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When a figure or a statement on The Watt Guide turns out to be wrong, we fix the page and add a dated note at its foot saying what changed. This log collects those notes in one place. Found something we have missed? Tell us. How our figures are put together is explained in our editorial standards.
- Appliance Wattage Chart: CPAP row changed from 40 W to 30 W humidifier off / 70 W on; 1,200 W microwave row now 1,650–1,850 W, with a labeled inverter-model example; electric dryer now shows 6,750 W starting watts instead of a dash.
- BLUETTI vs Jackery: The Line-Ups Compared in Numbers: Elite 100 V2 surge is 3,600 W, not 2,700 W; BLUETTI Lifting Power figures were listed as surge.
- BLUETTI vs OUPES: Which Line-Up Fits Your Size?: OUPES line-up starts at 288 Wh, not 1,024 Wh; Elite 100 V2 surge is 3,600 W, not 2,700 W; Apex 300 7,680 W and Elite 200 V2 3,900 W are lifting power, not surge.
- BTU to Watts Calculator: Window AC efficiency updated from an outdated EER 8-12 band to the federal minimum CEER, with the AC watt and amp figures recomputed.
- Batteries in Series vs Parallel: Battle Born and LiTime allow up to four drop-in LiFePO4 batteries in series; removed the unsupported claim that most makers will not warranty series wiring.
- Can a Portable Power Station Run a Gas Furnace?: Sizing table output for an ECM furnace overnight corrected from 1,500W to 1,800W; indoor fuel-heater advice given CO and local-rules caveats.
- EcoFlow DELTA Pro 3: Specs, Runtimes and Who It SuitsCheck price on Amazon: The page said the unit cannot be wired into a house. EcoFlow lists a transfer switch, an inlet box and Smart Home Panel 2 for it.
- EcoFlow DELTA Pro: Specs, Runtimes and Who It SuitsCheck price on Amazon: Fridge average 60W not 50W, runtimes recomputed (about 30 hours, not a day and a half); compressor start about 1,500W; Jackery warranty 5 years when bought from jackery.com.
- EcoFlow vs Anker SOLIX: Value Against Reach, Size by Size: DELTA Pro Ultra is not a 6,000 Wh single unit (6,144 Wh per battery); C2000 Gen 2 and F3000 are rated 4,000 cycles, not 3,000; C2000 Gen 2 weighs 41.7 lb; fridge start surge about 1,500 W.
- EcoFlow vs Jackery: Power Station Line-Ups Compared: DELTA 3 Max output is 2,400 W (3,000 W is the Max Plus), DELTA 3 Plus is 1,800 W with 4,000 cycles, DELTA 3 Classic surge is 3,600 W, Max Plus warranty is 3+2 years, and Explorer 1500 Ultra is 1,800 W rated with a 3,600 W peak.
- Electric Bike Batteries Explained: NMC e-bike battery cycle rating corrected from 500-800 to 500-1,000 full charge cycles; removed an unsourced claim that third-party batteries start most e-bike fires.
- Electric Scooters for Kids: Age, Speed and Safety: Removed the unsourced claims that states set minimum ages from the mid-teens to 18 and that most states require helmets for minors.
- Folding Electric Trike: What the Hinge Buys and What It Costs: The TK2 is no longer described as the lightest and cheapest folding trike. The comparison now covers all seven folding models.
- How Many Amps Does a Dishwasher Use?: Per-cycle energy corrected from 1.0-1.5 kWh (above the federal cap) to the rated caps of about 1.4 kWh (federal, standard size) and 1.1 kWh (ENERGY STAR); cycle-average draw corrected from 4-8 A to about 4-6 A on an ENERGY STAR model.
- How Many Amps Does a Microwave Use?: 1,200W microwave row widened to 1,400–1,850W (inverter models at the low end; plan on 1,800W) from Panasonic and GE specs; unsourced 60–70% efficiency claim replaced with nameplate ratios; 1,800W stations no longer said to clear 1,670W with margin.
- How Many Amps Does a Mini Fridge Use?: Standfirst startup surge changed from 3-5x running to up to about 800 W, matching the body and site-wide figure.
- How Many Amps Does a Refrigerator Use?: AC70 and Elite 30 V2 fridge-start claims corrected; outdated list prices removed.
- How Many Watts Does a Gas Furnace Use?: Hot surface igniter draw corrected from 100 W to 300-600 W; BLUETTI AC70 worked example corrected (its 1,500 W surge cannot start a 600-800 W PSC blower); surge-to-continuous ratio corrected from roughly double to 1.5-2x.
- How Many Watts Does a Portable Air Conditioner Use?: Single-hose portables were said to draw more watts and dual-hose units no infiltration; corrected to less cooling per watt.
- How Many Watts Does a Refrigerator Use?: Food discard rule: 2 hours or more above 40°F, or 1 hour above 90°F.
- How Many Watts and Amps Does an Air Conditioner Use?: Electricity rate 17 to 18 cents (EIA) with recomputed yearly and 8-hour costs; 3 ton 8-hour cost $2-$4 to $3-$4; central cost row relabelled 3-5 ton; outdated window-unit EER claim replaced with DOE minimum CEER.
- How to Calculate Watts (With Worked Examples): Back-feed warning corrected: the hazard is connecting a generator to house wiring without a transfer switch, not a generator inlet.
- Jackery Explorer 300 vs 300 Plus: 300 Plus no longer the cheaper unit: it is discontinued and the Explorer 300 now lists at $289.
- Jackery Explorer 5000 Plus: Specs, Runtimes and LimitsCheck price on Amazon: FAQ implied the Smart Transfer Switch was the only panel route; Jackery also sells a 50A manual transfer switch.
- Jackery vs Anker SOLIX: Compared Size by Size: Anker's C200 DC and C300 DC carry 3-year warranties, not 5; Jackery's 3-year models get 5 years at jackery.com; 5000 Plus 5 years only when bought direct.
- Mobility Scooter Batteries: Types, Lifespan and Range: Sealed lead-acid scooter batteries fly only under FAA conditions rather than being exempt; lithium swaps need the scooter maker's approval.
- NEMA 14-50 Outlet: Wiring, Breaker Size, Cost and Uses: Install cost now Tesla's published $750 to $1,500 estimate instead of an unsourced $300 to $800; range per hour now sourced to Tesla and EPA figures.
- Segway Electric Scooters: Every Current Model Explained: Motor ratings in the E, F and Max rows of the series table; the range FAQ's claim that headline ranges exclude eco mode; the unsourced 20 mph state-cap claim in the legal FAQ.
- The Best Folding Electric Bikes: Corrected the Ranger S 2.0 price to $999, the Velotric weight gap, and Rad's warranty and service claim after its Chapter 11 sale.
- The Power Station Price Index: EcoFlow's LiFePO4 share is 80%, not 60% (index 92%, 82 of 89); BLUETTI's cost-per-Wh spread is 3.0 times, not 5.5, after an Elite 10 Mini two-pack had been counted at one unit's 128 Wh.
- VA to Watts Calculator: Single-phase generators are rated at power factor 1.0 (kVA equals watts), not the 0.8 the page applied to all generators.
- What E-Bike Should I Buy?: Class 1 trail access qualified: national forests treat all e-bike classes as motor vehicles.
- What Is Plug-In Solar?: Germany's plug-in count raised from roughly a million to about 1.5 million; the no-electrician claim qualified for Maine above 420W; Virginia's January 1, 2027 start date added.
- What Size Power Station Do I Need?: Recommended capacity now adds the guide's own 30% headroom (about 2,000-3,300Wh, not 1,500-2,500Wh); per CDC, fridge food is safe for 4 hours, not through a 4-8 hour outage; a single 5,040Wh portable unit does exist.
- 3-Wheel Electric Bikes: Types, Costs and Every Adult Model: Charging cost now uses the 18-cent EIA rate (about 21 cents a charge, not 23), and the title no longer claims every adult model.
- Are Electric Trikes Street Legal? The Federal Definition, the Classes and Local Rules: Makers list overall width, not rear-axle width.
- Bluetti Apex 300: Specs, Runtimes and Who It SuitsCheck price at BLUETTI: Corrected the claim that EcoFlow refills faster from a wall socket, the runtimes and the 24-hour outage example (now using BLUETTI's formula with 20W self-consumption), the Starlink weekend estimate (about 1.2 days, not two), the Elite 200 V2's 'similar capacity' (it has three-quarters) and the capacity (2,764.8Wh).
- Do I Need a Permit for Plug-In Solar?: Utility-approval advice limited to states without a plug-in law in force; German balcony-solar count tied to Bundesnetzagentur registrations.
- EcoFlow Delta 2 vs Delta 3: Page said EcoFlow no longer publishes DELTA 2 specs; it still does, and the unverified second-URL 404 claim was removed.
- Generac Generator Cost: Unit, Installation and Total Price: Generac unit prices corrected to Generac's list prices (22 kW $6,119, not $3,500-$5,500) with installed totals recomputed; maintenance schedule corrected to the owner's manual; DELTA Pro Ultra list price corrected to $5,799.
- Home Battery Backup: Jackery warranty terms corrected to Jackery's published policy: 5 years on the Explorer 5000 Plus series, a 3-year or 2-year base on other models.
- How Many Watts Does a Heat Pump Use?: Apex 300 list price corrected from $1,899 to $1,699; claim that cold-climate units hold a COP above 2 at 5°F replaced with ENERGY STAR's 1.75 floor and spec-sheet COPs.
- How Much Electricity Does a Solar Panel Actually Generate?: Winter output figures fit only northern states; now split by region per PVWatts, and the 400W summer range is now 1.6-2.2kWh.
- Manual Transfer Switch: How It Works, Cost and Sizing: BLUETTI 100A switch was framed as a near-whole-panel generator switch but is an EP800/EP900 battery accessory; unsourced per-tier install costs removed and cost figures credited to Angi (July 2026).
- Specialized Turbo Levo: Generations, Specs and Prices: Levo 4 motor ratings (810 W/105 Nm; S-Works 850 W/111 Nm), unverified Class 3 app mode removed, lineup is five bikes not two, Levo 4 model year, Horst chainstay change 11mm not 9mm, 77-degree seat angle, Comp frames are carbon not alloy, unsourced 90-minute extender claim, geometry adjustment is not tool-free.
- Velotric Electric Bikes: 2026 Lineup Compared: Model count from six to 14; the claim that every model has Class 1/2/3 (Triker is 1/2, T1 ST Plus is 1/3); Fold 1 Plus price from $1,574 to $1,499; Lectric XP4 750 price from $1,311 to $1,299; the highest-peak-power and hub-torque claims; Tempo motor and Fold 1 Plus battery comparisons; battery warranty from 'at least 75%' to Velotric's 'up to 75%'; removed the unverified Fold 1 Lite.
- 3000 Watt Solar Generator: What It Runs and Which Units Fit: Fridge power figures and well-pump figures, to match the figures used across the site.
- 5000 Watt Solar Generator: 5,000W or 5,000Wh?: Well-pump figures, to match the figures used across the site.
- Ah to kWh Calculator: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Amp Hours to Watt Hours Calculator: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Appliance Wattage Chart: Fridge power figures and well-pump figures, to match the figures used across the site.
- Appliance Wattage Chart: A 1,500W space heater's 12.5A draw is now described as over a 15A circuit's 12A continuous limit, not as that circuit's ceiling.
- Are Electric Bikes Worth It?: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- BLUETTI AC180 vs AC180P vs AC180T: Microwave power draw and CPAP power draw, to match the figures used across the site.
- BLUETTI AC50P: Specs, Runtimes and What Replaced ItCheck price at BLUETTI: Fridge power figures, CPAP power draw and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- BLUETTI Elite 200 V2: Specs, Runtimes and Who It SuitsCheck price at BLUETTI: Fridge power figures, microwave power draw, CPAP power draw, well-pump figures and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Bluetti Apex 300: Specs, Runtimes and Who It Suits: Fridge power figures, microwave power draw, CPAP power draw and motor start-up surge, to match the figures used across the site.
- Bluetti vs EcoFlow: AC200L no longer recommended (BLUETTI's US store lists it as discontinued); unsourced brand-wide cost-per-Wh, app and resale claims replaced with dated per-model figures.
- Can Renters Install Solar?: Fridge power figures, to match the figures used across the site.
- Can a Solar Generator Power a House?: Microwave power draw and CPAP power draw, to match the figures used across the site.
- Can a Solar Generator Power a House?: Central AC and well pump rows now note that battery systems rated for the motor start can run them.
- EcoFlow DELTA Pro 3: Specs, Runtimes and Who It Suits: Fridge power figures, microwave power draw, CPAP power draw, well-pump figures and motor start-up surge, to match the figures used across the site.
- EcoFlow DELTA Pro: Specs, Runtimes and Who It Suits: Fridge power figures, microwave power draw, CPAP power draw and well-pump figures, to match the figures used across the site.
- EcoFlow Delta 2 vs Delta 3: CPAP power draw, to match the figures used across the site.
- EcoFlow Delta 3 vs Delta 3 Classic: CPAP power draw, to match the figures used across the site.
- EcoFlow Delta 3 vs Delta 3 Plus: CPAP power draw, to match the figures used across the site.
- EcoFlow RIVER 3 Plus: Specs, Runtimes and Who It SuitsCheck price on Amazon: Fridge power figures, microwave power draw, CPAP power draw and well-pump figures, to match the figures used across the site.
- EcoFlow River 2 vs River 3: CPAP power draw, to match the figures used across the site.
- EcoFlow River 2: Specs, Runtimes and Who It Suits: Fridge power figures and CPAP power draw, to match the figures used across the site.
- EcoFlow vs Anker SOLIX: Value Against Reach, Size by Size: Fridge power figures and CPAP power draw, to match the figures used across the site.
- EcoFlow vs Jackery: Power Station Line-Ups Compared: Fridge power figures and CPAP power draw, to match the figures used across the site.
- Electric Mopeds: Speed, Range, Cost and Licensing: The electricity rate (now about 18 cents per kWh, EIA 2026), to match the figures used across the site.
- Home: Fridge power figures and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Home Battery Backup: Fridge power figures, CPAP power draw and well-pump figures, to match the figures used across the site.
- How Many Amps Does a Dishwasher Use?: The NEC section cited for the 50% limit on fastened-in-place equipment is now labeled as the 2020-and-earlier numbering, because the 2023 edition reassigned 210.23(A) to 10-amp circuits (as of October 2026).
- How Many Amps Does a Microwave Use?: Fridge power figures, microwave power draw and motor start-up surge, to match the figures used across the site.
- How Many Amps Does a Mini Fridge Use?: Fridge power figures, to match the figures used across the site.
- How Many Amps Does a Refrigerator Use?: Fridge power figures and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- How Many Amps Does a Space Heater Use?: Fridge power figures, to match the figures used across the site.
- How Many Watts Does a CPAP Machine Use?: CPAP power draw, motor start-up surge, the electricity rate (now about 18 cents per kWh, EIA 2026) and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- How Many Watts Does a CPAP Machine Use?: CPAP peak draw corrected from an unsourced 80-110W to ResMed's listed 73.2W (AirSense 11) and 104W (AirSense 10); unsourced 65-90W power-brick claim replaced with ResMed's 65W and 90W supplies.
- How Many Watts Does a Gas Furnace Use?: Motor start-up surge, to match the figures used across the site.
- How Many Watts Does a Refrigerator Use?: Fridge power figures, the electricity rate (now about 18 cents per kWh, EIA 2026) and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- How Much Electricity Does a Dehumidifier Use?: The electricity rate (now about 18 cents per kWh, EIA 2026), to match the figures used across the site.
- How Much Propane Does a Generator Use?: US electricity rate updated to 18 cents/kWh (EIA 2026), so charging cost is now $0.20-0.21 per kWh stored; EcoFlow DELTA 3 Max price corrected from $799 to $879.
- How to Calculate Amp-Hours: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- How to Calculate Watts (With Worked Examples): Fridge power figures, well-pump figures, motor start-up surge and dryer wattage, to match the figures used across the site.
- How to Lower Your Electric Bill: The electricity rate (now about 18 cents per kWh, EIA 2026), to match the figures used across the site.
- How to Size a Solar System: The name of the federal lab behind PVWatts, renamed the National Laboratory of the Rockies in December 2025.
- Jackery Explorer 300 vs 300 Plus: CPAP power draw, to match the figures used across the site.
- Jackery Explorer 5000 Plus: Specs, Runtimes and Limits: CPAP power draw, to match the figures used across the site.
- Jackery vs Goal Zero: CPAP power draw, to match the figures used across the site.
- LiFePO4 Batteries for Solar Storage: Sizing and Cost: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- LiFePO4 Portable Power Stations: What the Chemistry Changes: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- LiFePO4 vs Lithium-Ion: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Manual Transfer Switch: How It Works, Cost and Sizing: Well-pump figures, to match the figures used across the site.
- On-Grid vs Off-Grid Solar: Costs and Which to Choose: The EIA average household electricity figure (about 10,400 kWh a year, 2024 data) and the solar array sizing worked from it.
- Portable Generator Maintenance Schedule: Maintenance intervals corrected to the makers' published schedules (break-in oil change, spark plug and air filter replacement, valve check, oil about every 100 hours rather than 50); Champion's first oil change is 5 hours; BLUETTI AC180 list price corrected to $499.
- Power Station Not Working? Work Through This First: Fridge power figures, to match the figures used across the site.
- Power Station vs Gas Generator: Well-pump figures, to match the figures used across the site.
- Power Station vs Gas Generator: The CPSC count of yearly carbon monoxide deaths linked to portable generators.
- Segway Electric Scooters: Every Current Model Explained: The electricity rate (now about 18 cents per kWh, EIA 2026), to match the figures used across the site.
- Smart Electrical Panels: Cost and Whether They Pay Off: The NEC edition that added the energy-management-system rule for sizing a service (2023, section 220.70), not 2020.
- The Best Electric Mountain Bikes: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Velotric Electric Bikes: 2026 Lineup Compared: Whether Velotric's 750W models meet the federal low-speed e-bike definition, which requires a motor of less than 750W.
- Watt Hours to Amp Hours Calculator: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Watts to kWh Calculator: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- Wh to mAh Calculator: The FAA limit of two spare 100-160Wh batteries per passenger.
- What E-Bike Should I Buy?: Battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- What Size Power Station Do I Need?: Fridge power figures, microwave power draw, CPAP power draw and battery depth-of-discharge or cycle-life figures, to match the figures used across the site.
- What Will a 3,500-Watt Generator Run?: Fridge power figures and motor start-up surge, to match the figures used across the site.
- 3-Wheel Electric Bikes: Types, Costs and Every Adult Model: The price range and median now count the seven adult trikes with a price shown on this page, whose median is $1,500.
- 3000 Watt Solar Generator: What It Runs and Which Units Fit: The Pecron E3600LFP's solar input (2,400 W, not 150 W), the OUPES Mega 3's warranty (5 years, not 1) and solar input (2,100 W), and the microwave's draw from the outlet in the load and runtime figures.
- 5000 Watt Solar Generator: 5,000W or 5,000Wh?: The Anker SOLIX F3800 Plus's solar input (3,200 W, more than the F3800) and weight (136.7 lb), and the EcoFlow DELTA Pro Ultra's published output (7,200 W at 120/240 V) and battery size (6,144 Wh per module).
- 72V Electric Bike Battery: Power and Legal Limits: Price per Wh across the three packs, which charger Aegis offers with each pack (5A for 20Ah and 30Ah, 10A for 40Ah) and the charging times that follow, range estimates by speed, series cell counts for 48V and 52V packs, and what New York City's battery law covers (sale, lease and rental, not use).
- Amp Hours to Watt Hours Calculator: What an amp-hour rating means, since lead-acid batteries are usually rated at the 20-hour rate and deliver less at high currents, while LiFePO4 delivers close to its rating within its battery management system's limit.
- Amps to Watts Calculator: How much a 600-watt array loses on a 30-amp, 12-volt charge controller (up to about 28% of its rated peak at midday, and much less across a whole day, not a third of the array).
- Appliance Wattage Chart: Microwave input watts, which output rating covers running and starting loads, how motor start-up surges can coincide, the station sizes for the fridge and sump-pump examples, and the 240-volt output and electrician-installed connection a 240-volt well pump needs.
- Are Electric Bikes Worth It?: The payback now uses the running cost a replaced car trip saves (about 15 to 30 cents a mile) rather than the full cost of owning a car, the AAA ownership figure is its 2025 estimate of $11,577 a year, and the RadWagon 5 entry fixes a garbled model name, drops an undated price and notes the 2026 sale of Rad Power Bikes' assets to Life Electric Vehicles Holdings.
- Are Electric Trikes Street Legal? The Federal Definition, the Classes and Local Rules: The trike table now lists all eight adult trikes, including three Emojo models that list a 20 mph top speed, the Class 1 and Class 2 assist limit.
- BLUETTI AC180 vs AC180P vs AC180T: The four AC180 listings are two current models, the AC180T and a solar-panel bundle, and the AC180T's extra weight and price come from its two hot-swappable 716.8 Wh battery packs, with output limited to 1,200 W on one pack.
- BLUETTI AC50P: Specs, Runtimes and What Replaced It: The AC output of the Jackery Explorer 500 (500 W continuous and 1,000 W surge, not 110 W) and of the Goal Zero Yeti 700 (600 W continuous and 1,000 W surge, not 182 W with no surge rating) in the comparison table and text.
- BLUETTI Elite 200 V2: Specs, Runtimes and Who It Suits: An earlier version said the Jackery Explorer 2000 v2's solar and AC input figures were not published; Jackery lists up to 400 W of solar input, a 4,400 W surge peak and an AC charging input of up to 15 A, now shown in the comparison table.
- BLUETTI vs Jackery: The Line-Ups Compared in Numbers: The Jackery HomePower 3000's output (3,600 W continuous and 7,200 W surge, not 2,400 W), Jackery's warranty (three years plus two free years when registered or bought direct), and Jackery surge, cycle and solar figures that were wrongly shown as unpublished.
- BLUETTI vs OUPES: Which Line-Up Fits Your Size?: OUPES's warranty on its Mega models (five years, plus a sixth with registration, not one year) and the Mega solar input, AC charging and weight figures that were wrongly shown as unpublished.
- BTU to Watts Calculator: How far thermal watts overstate an air conditioner's draw, the heat limits of 15 A and 20 A circuits and of plug-in heaters, the heat pump formula, and the heater runtime example.
- Batteries in Series vs Parallel: An aged battery has higher, not lower, internal resistance, and batteries must be fully charged or voltage-matched before they are connected in parallel.
- Best Power Station for Starlink: How much a solar array returns on two to three winter sun hours, which is about 40 to 60 percent of what it returns on five.
- Bluetti Apex 300: Specs, Runtimes and Who It Suits: The fridge and furnace-blower runtimes, the 24-hour outage example (that load needs roughly 5,000Wh against about 2,350Wh usable, so a full day needs an expansion battery), and the buying advice, which wrongly called this the pick for maximum stored energy per dollar.
- Bluetti vs Anker SOLIX: Compared on the Numbers: Anker's line-up under 1,600 Wh also includes the AC-equipped SOLIX C300, the C800 and the C1000 Gen 2, so the page no longer says Bluetti offers more choice at that size.
- Bluetti vs EcoFlow: The claim that EcoFlow charges much faster than Bluetti (matched models take similar wattage from the wall), which brands sell expansion batteries, the Elite 200 V2's capacity and strengths, Anker SOLIX's balcony battery and Jackery's capacity per dollar.
- Budget Electric Scooters: What $300, $500 and $800 Buy: The comparison of the Hiboy S2 Pro and VE1 Pro, which come from the same maker and are $93 apart.
- Can Renters Install Solar?: The capacity of the Jackery Explorer 300 Plus, and where community solar is available.
- Can a Portable Power Station Run a Gas Furnace?: When a bonding plug is safe to use and which transfer switch a bonded-neutral unit needs, the daily energy of the ignitor and inducer, how much a lower thermostat setting saves, the runtime on a 2,000Wh battery and the capacity needed for a full day, and the capacities of the largest suggested units.
- Can a Solar Generator Power a House?: A refrigerator's running draw versus its 24-hour average, and the energy a fridge, furnace and lights need over a full heating-season day.
- Charging an E-Bike From a Power Station: Filling a 672Wh e-bike pack takes about 950Wh of rated station capacity once inverter loss is counted, so a 1,000Wh-class station, not an 800Wh one.
- Commuter Electric Scooters: What Matters for a Daily Ride: An earlier version put Hawaii's residential electricity rate above 50 cents per kWh; EIA's preliminary July 2026 figures run from about 12.7 cents in Louisiana to 48 cents in Hawaii.
- Do I Need a Permit for Plug-In Solar?: The status of state plug-in solar laws; by October 2026 ten states, not Utah alone, had passed one.
- Dual Fuel Generators: How They Work and Whether You Need One: Why a generator makes less power on propane (the vapor displaces intake air; energy per gallon affects runtime and running cost, not peak output), why propane costs more per kWh in the worked example, and whether fuels can be switched while the engine runs, which depends on the model.
- EcoFlow DELTA Pro 3: Specs, Runtimes and Who It Suits: An earlier version said EcoFlow does not publish the DELTA Pro 3's warranty, solar input, AC input and weight; EcoFlow lists a 5-year warranty, 2,600 W of solar input, about 113.5 lb and 120 V and 240 V outputs, the DELTA Pro's published figures are now in the comparison table, and the note on how this page makes money now names the Amazon and Awin links.
- EcoFlow DELTA Pro: Specs, Runtimes and Who It Suits: An earlier version said the DELTA Pro's surge rating, cell chemistry, cycle rating, solar input and weight were not published; EcoFlow lists 7,200W surge, LFP cells, 3,500 cycles to 80% capacity, 1,600W of solar input and about 99 lb, and the DELTA Pro 3's 5-year warranty is now shown too.
- EcoFlow Delta 2 vs Delta 3: The DELTA 3 Max specifications (2,400 W rated, 4,800 W surge, 1,800 W AC charging and 500 W solar; the 3,000 W figure belongs to the DELTA 3 Max Plus) and the microwave runtime, which now uses the microwave's input power rather than its cooking power.
- EcoFlow Delta 3 vs Delta 3 Classic: The 1,000 W microwave runtime, which now uses the roughly 1,400-1,700 W the microwave draws from the outlet rather than its cooking rating, giving about 35 minutes instead of 52.
- EcoFlow Delta 3 vs Delta 3 Plus: Car charging is about 100 W from a 12 V socket, with 800 W only through the separately sold Alternator Charger; EcoFlow's published 56-minute AC charge time; and the microwave runtime, which now uses the oven's input draw rather than its cooking power.
- EcoFlow RIVER 3 Plus: Specs, Runtimes and Who It Suits: EcoFlow's published surge, solar input, wall charging, cycle, warranty, weight and extra-battery figures, which an earlier version listed as unpublished; the DELTA 3 Plus's rated output (1,800 W) and surge (3,600 W); the OUPES Mega 1 warranty (5 years, not 1); and which links on the page earn a commission.
- EcoFlow River 2: Specs, Runtimes and Who It Suits: The CPAP runtime with the humidifier off, which is about seven hours through the AC outlet and short of an eight-hour night, and the battery size needed for a full night with a heated humidifier, which is about 850 Wh rather than 700 Wh.
- EcoFlow vs Anker SOLIX: Value Against Reach, Size by Size: Anker's models between 288 and 1,056 Wh and its other AC models under 700 Wh, the EcoFlow DELTA Pro Ultra's 7,200 W output, EcoFlow's solar input figures, Anker's expansion to about 26.9 kWh, the DELTA 3 Max's ratings (2,400 W rather than 3,000 W, with a 4,800 W surge), the F3800 Plus weight, and EcoFlow figures that were missing from our data rather than unpublished.
- EcoFlow vs Jackery: Power Station Line-Ups Compared: The AC output of Jackery's HomePower 3000 and 3600 Plus (3,600 W, not 2,400 W), Jackery's 3-plus-2-year warranty, the DELTA Pro Ultra's output and expansion, EcoFlow's solar input on its large units, which spec gaps are in our data rather than in EcoFlow's specifications, and the verdicts that depended on them.
- Electric Bike Batteries Explained: New York City's UL certification law covers selling, leasing and renting e-bikes and batteries, not charging them indoors, and battery voltage is a design choice rather than a quality tier.
- Electric Mopeds: Speed, Range, Cost and Licensing: The federal and state definitions that separate an e-bike from a moped, Delaware's moped definition and its titling and registration rule, and Super73's bikes, which are sold as e-bikes rather than mopeds.
- Electric Scooters for Kids: Age, Speed and Safety: Minimum ages for riding an electric scooter on public roads vary by state rather than being 16 almost everywhere, California requires a driver's license or instruction permit rather than a minimum age of 16, and UL 2272 covers e-scooters and hoverboards while UL 2849 covers e-bikes.
- Electric Trike vs Electric Bike: What the Numbers Decide: An earlier version said Lectric publishes no weight for the XP Trike2 or the XPress2 Commuter; Lectric's pages give about 86 lb and 63 to 68 lb with the battery, which moves the trike weight median to 93 lb and the trike-to-bike gap to about 18 lb, and the XP Trike2's published width, payload and rider limit are now included.
- Fat Tire Electric Trikes: What the Wide Tires Buy and Cost: Five adult trikes publish a weight, not four, including the Lectric XP Trike2 at about 86 lb with its battery, and the XP Trike2 runs on 20 x 2.5 in tires, so it is not a fat-tire model.
- Folding Electric Trike: What the Hinge Buys and What It Costs: The Lectric XP Trike2 also folds, so the page now counts two folding adult trikes and gives Lectric's published weight, folded size, payload and UL certifications for it.
- Generac Generator Cost: Unit, Installation and Total Price: The high-end total of the cost lines, the 10-year maintenance cost, and the electrical permit and inspection that a home battery connected to the panel normally needs.
- Home Battery Backup: The average draw of the essential loads, how long a 2,000Wh battery runs a fridge, the size of the largest portable power stations, Bluetti's expansion-battery range, and how much a 400W solar array replaces each day, against both the essentials and a space heater.
- How Many Amps Does a Dishwasher Use?: The electrical-code basis for a dishwasher's own circuit (a wash cycle is not a continuous load), its GFCI requirement, the average current over a full cycle, and the affiliate disclosure, which now names the Amazon link.
- How Many Amps Does a Microwave Use?: The electrical-code rule that limits how much current one microwave may draw on a 15 A or 20 A circuit, and how inverter microwaves draw power at lower settings.
- How Many Amps Does a Mini Fridge Use?: The estimated mini-fridge runtimes for each power station, the thermoelectric comparison, the point that a station's surge rating decides whether it can start the compressor, and the affiliate disclosure, which now names the Amazon links.
- How Many Amps Does a Refrigerator Use?: The startup-surge range, what the nameplate rating covers, what usually trips a refrigerator circuit, and the GFCI requirement for kitchen refrigerator outlets.
- How Many Amps Does a Space Heater Use?: The headroom on a 20 A circuit, when a space heater trips a breaker, and the advice to plug a heater straight into its own wall outlet rather than an extension cord or power strip.
- How Many Amps Does a TV Use?: How the Department of Energy's test arrives at a TV's rated wattage, why plasma sets were discontinued, and the power station runtimes for a 150 W OLED set.
- How Many Amps Does a Washing Machine Use?: The draw of a washer's internal sanitize heater (LG lists 1,000 W on its US 120-volt models; an earlier version said 1,800 W and over 15 amps) and the code rule for the 20-amp laundry circuit.
- How Many Amps Is 1,500 Watts?: The EcoFlow DELTA Pro's capacity and runtime, the number of kettle boils per charge, and what happens when a 1,500 W heater runs for hours on a 15-amp circuit.
- How Many Watts Does a CPAP Machine Use?: The watt-hours a CPAP uses per night, the nightly running cost and which table rows the text refers to; an affiliate disclosure was also added.
- How Many Watts Does a Gas Furnace Use?: The electrical-code rule that gives a furnace its own circuit (NEC 422.12), which blower motors surge at startup and by how much, how to tell a PSC blower from an ECM by build date, the PECRON E1500LFP's continuous and peak ratings, and the affiliate disclosure, which now names Amazon.
- How Many Watts Does a Heat Pump Use?: How inverter mini-splits start and how multi-zone systems draw power, the code rule for sizing a heat pump circuit (nameplate MCA and MOCP under NEC Article 440), the EcoFlow DELTA 3 Max's 2,400W output, which portable power stations can reach whole-home heat pump loads, and the affiliate disclosure, which now names Amazon.
- How Many Watts Does a Portable Air Conditioner Use?: The advice on soft-start kits, which are rarely fitted to portable units, and the explanation of why single-hose units cost more to run.
- How Many Watts Does a Refrigerator Use?: The daily and yearly energy use of mini fridges and 7 cu ft chest freezers, and the battery capacity needed to run a fridge for two days.
- How Many Watts Does a TV Use?: The wattage range for a 55-inch LED TV, the yearly energy use of 55- and 65-inch TVs, and the comparison between an always-on cable DVR and the TV it feeds.
- How Many Watts and Amps Does a Dryer Use?: A gas dryer's electricity use per load and per year and its yearly electricity cost, the savings from air-drying in summer, and the runtime cells for power stations whose inverters are too small to run a dryer.
- How Many Watts and Amps Does an Air Conditioner Use?: The circuit rule for plug-in window and wall air conditioners (NEC 440.62), which limits a unit that shares its circuit with lights or outlets to half the circuit rating.
- How Much Electricity Does a Dehumidifier Use?: How desiccant and compressor dehumidifiers compare in watts and in cold basements, and the advice on sharing a circuit with a sump pump.
- How Much Electricity Does a Solar Panel Actually Generate?: The share of its rated output a solar panel produces under heavy overcast and under haze or broken cloud.
- How Much Gas Does a Generator Use?: The fuel-use figures for a 2,000-watt inverter generator in the table.
- How Much Propane Does a Generator Use?: Generator efficiency and the propane fuel cost per kWh, the change in propane use between half and full load, the cost per kWh of charging a power station and of its purchase price, how a 2 kWh power station compares with a 20 lb tank, propane tank pressures by temperature, and the amount of propane in an exchange tank.
- How to Calculate Amp-Hours: The 12-volt current for a 65 W laptop charged through an inverter (6.4 A, not 5.4 A), and the power-station suggestion, which now allows for conversion losses, the 12-volt port limit and the Apex 300's lack of built-in 12-volt outputs.
- How to Calculate Watt-Hours: The laptop battery example, which now uses a realistic 6,000 mAh pack at 11.55 volts (69 Wh) instead of an impossible 60,000 mAh one.
- How to Calculate Watts (With Worked Examples): The 240-volt dryer comparison and the power-factor advice for sizing equipment from a VA rating.
- How to Lower Your Electric Bill: Heating and cooling make up roughly a third of a typical home's electricity (about half only when gas and other fuels are counted), not half of the bill, and turning a water heater down saves about 3-5% of water heating cost per 10 degrees Fahrenheit, not 4-9%.
- How to Size a Solar System: The 12-volt fridge row, which now shows 45 W running and about 17-25 W average to match its 400-600 Wh a day.
- Jackery Explorer 300 vs 300 Plus: The Explorer 300's battery chemistry, weight and cycle life, the Explorer 300 Plus's surge rating and cycle life, and the verdict that relied on them.
- Jackery Explorer 5000 Plus: Specs, Runtimes and Limits: Both 240V outlets are limited to 30A (an EV charger must be set to 24A or less, and a dryer or range needs a rated adapter and a draw within 30A), starting a 3-ton central air compressor depends on its nameplate LRA being under about 60A, cooling is a long-running compressor load, and the essentials runtime is about 26 hours on one unit.
- Jackery vs Anker SOLIX: Compared Size by Size: The AC output and surge ratings of the Jackery HomePower 3000 and HomePower 3600 Plus (3,600 W, 7,200 W surge) and the home-backup picks that relied on them, the Explorer 300 Plus surge and cycle ratings, the Explorer 1000 v2 and Anker 521 surge ratings, the original Explorer 1000 capacity, output and battery chemistry, Jackery's share of LiFePO4 models, and the affiliate disclosure.
- Jackery vs Goal Zero: The battery chemistry of Jackery's range, whose older Explorer models used NMC lithium-ion cells, and the Explorer 300 naming note, which now separates the original NMC Explorer 300 from the LiFePO4 Explorer 300 v2 and 300 Plus and from the Solar Generator 300 bundle.
- Jetson Scooter Models and Specs: Which One Fits: The Ryder Pro's implied energy use per mile is nearly double the Knight's, which makes it roughly half as efficient, not twice as efficient.
- LiFePO4 Batteries for Solar Storage: Sizing and Cost: The lifetime throughput and cost per kWh cycled for both batteries, which now apply the 80% depth of discharge behind their cycle ratings.
- Manual Transfer Switch: How It Works, Cost and Sizing: The order for switching back to utility power (circuits to LINE, generator off, then cord disconnected), and the main-breaker step, which belongs to generator interlock kits rather than transfer switches.
- Mobility Scooter Batteries: Types, Lifespan and Range: The FAA and IATA rules for flying with a lithium mobility-scooter battery, covering built-in, removable and spare batteries, and the battery setup of compact travel scooters.
- NEMA 14-50 Outlet: Wiring, Breaker Size, Cost and Uses: The NEC edition and section behind the GFCI rule for garage outlets, the GFCI requirement for EV-charging receptacles under NEC 625.54, the NEC sections for continuous loads, and how far 6 AWG copper can run before voltage drop passes 3 percent.
- Nakto Electric Bikes: Models, Specs and Prices: The price range of Nakto's fat-tire, cargo and trike models, and how Nakto's cost per watt-hour compares with the other bikes in the comparison table.
- On-Grid vs Off-Grid Solar: Costs and Which to Choose: The cost of a half-mile utility line extension, and where a plug-in solar kit can skip the utility's interconnection process.
- Plug-In Solar vs Rooftop Solar: Plug-in solar costs less per watt than rooftop solar, not more; its drawbacks are lower yield per watt and no credit for exported power.
- Portable Generator Maintenance Schedule: The shutdown steps that keep fuel out of the carburetor, how oil-change intervals vary by maker and model, and the storage charging a power station still needs; we also added a carbon-monoxide warning for running a generator.
- Power Station vs Gas Generator: The fuel use of a typical 2,000-watt inverter generator per hour, per night and over three days.
- Segway Electric Scooters: Every Current Model Explained: Ninebot acquired Segway Inc. in 2015, not the reverse; the e-bike three-class system is state law, not federal; and the P series is a heavy long-range commuter line, not an ultra-portable one.
- Smart Electrical Panels: Cost and Whether They Pay Off: The backup runtime example now works from daily energy use, so the fridge, sump pump, lights and router list lasts roughly 1.5 to 3 days on a 10 kWh battery, not 7.6 hours.
- Solar Battery Size Calculator: 100Ah lithium (LiFePO4) batteries are 12.8V nominal, so the van example and the 100Ah answer now give about 1,280 Wh per battery, and the 100% depth-of-discharge row now says LiFePO4 can reach it but leaves no reserve.
- Solar Panel Angle Calculator: The tilt angles are a rule of thumb (latitude times 0.76 plus 3.1 degrees, fitted for about 25 to 50 degrees latitude), not exact geometry, and a tilting bracket on a flat-mounted RV array recovers about a tenth of its yearly output, less than a third panel would add.
- Specialized Turbo Levo: Generations, Specs and Prices: When the Turbo Levo SL became a separate frame, the Turbo Levo 4's chainstay length, and the Turbo Levo prices, which now follow Specialized's US list prices as of 9 October 2026 and no longer say the SL is the cheaper line.
- The Best Commuter E-Bikes: By this page's own method a hilly 30-mile round trip needs about 800 to 1,000Wh, not 750Wh, and the Lectric XP4 750's 840Wh keeps the one-third reserve only at 20Wh per mile.
- The Best Electric Cruiser Bikes: The cruiser riding position, where many models set the pedals forward of the saddle, and an unsupported claim that step-through frames weigh two to four pounds more.
- The Best Electric Mountain Bikes: The Santa Cruz Heckler SL 70 is about 39lb lighter than the 83lb Magicycle Deer, and only about 7 to 9lb of that gap is its smaller battery.
- The Best Folding Electric Bikes: The 60 to 75 lb weight range applies to fat-tire folders with large batteries (light folders weigh roughly 35 to 50 lb), and the batteries here are about four times the 160 Wh airline limit, not up to ten times.
- The Power Station Price Index: How much cheaper the 1,200-2,600Wh class is than its neighbors, how the 91-unit and 89-unit counts reconcile, the LiFePO4 share of the models in the brand tables, the reason for the $0.08/Wh cut-off, and a description of the figures as list-price arithmetic rather than measurements.
- Two Bluetti Elite 100 V2 vs One Elite 200 V2: BLUETTI does publish a UPS switchover time for the Elite 200 V2 (15 ms, against 10 ms for the Elite 100 V2).
- VA to Watts Calculator: 0.8 is the power-factor convention for generators and kVA-rated inverters, while desktop UPS units are usually 0.6-0.67, and a 1,500VA UPS is rated anywhere from about 900W to 1,500W depending on the model.
- Velotric Electric Bikes: 2026 Lineup Compared: The GoMad cargo bike switches between Class 1, 2 and 3 like the rest of Velotric's lineup, per Velotric's spec sheet; an earlier version said it had no Class 1 mode.
- Volts to Watts Calculator: A 30A charge controller on 12V given 600W of panel clips only the midday peak above about 430W rather than wasting a third of the harvest, and a 30A RV pedestal breaker trips above 30A (3,600W), not at the 2,880W continuous-load design limit.
- Watt Hours to Amp Hours Calculator: How lead-acid batteries are rated (usually at the 20-hour rate, with no battery management system), and the controller example, where a 400 W array on a 12 V bank pushes about 29 A, so a 30 A MPPT controller is adequate.
- Watts to BTU Calculator: Why the BTU/h figure is larger than the wattage, how to work out a heat pump's heat output from its electrical draw (watts times COP times 3.412), and the hair dryer row (1,875 W, 6,398 BTU/h).
- Watts to Volts Calculator: An earlier version said to size cable and fuses from a measured reading; they are sized from the maximum current (the nameplate or an inverter's maximum input) with the 125% continuous-load factor, following the manual and local code.
- Watts to kWh Calculator: A 1,500W heater empties a 2 kWh battery in about 70 minutes once inverter losses are counted, not 80.
- Wh to mAh Calculator: A few compact power stations, such as the 99.2Wh Jackery Explorer 100 Plus, are built under 100Wh and fly under power-bank carry-on rules, and a 30Wh pack takes about three 18650 cells, not two.
- What Does a Home Battery Actually Cost?: What the SAIDI, SAIFI and CAIDI utility reliability figures measure.
- What E-Bike Should I Buy?: The affiliate note now names the page's one Amazon link, the lightest e-bikes weigh under 30 lb, and the 20-30 Wh per mile figure applies to sustained Class 3 pedal-assist speeds.
- What Is Plug-In Solar?: The circuit-safety explanation (an output cap does not stop the wiring from carrying grid current plus the kit's current), the payback range, the state plug-in solar laws enacted since Utah's, with a dated table, the UL 3700 certification status and the anti-islanding shutdown time.
- What Size Power Station Do I Need?: The winter energy needed with a gas furnace blower, the Bluetti Apex 300's capacity, the output figure for the job-site row, what utility medical baseline programs provide, and the inverter rating a fridge needs on its own.
- What Will a 3,500-Watt Generator Run?: Which rating the 3,500 W figure refers to on different generator types, whether a window air conditioner can start on its own, which second compressor loads can fit, the EcoFlow DELTA 3 Max's AC output, and the affiliate disclosure.
- kW to Amps Calculator: 12-volt inverters of about 5 kilowatts are sold, though they are rare and need very heavy cable.
- kWh to Ah Calculator: 48 volts is the standard for DIY and off-grid rack batteries, while many installer-fitted home batteries use high-voltage stacks.
- mAh to Wh Calculator: A few power stations are built under 100 watt-hours and can fly under the same carry-on rules as a power bank.