The Power Station Price Index

Method, in short

Cost per watt-hour by brand

Median rather than mean, because a single flagship distorts an average badly at these sample sizes. The spread column is the point most buying guides miss: the gap inside a brand can be wider than the gap between brands. BLUETTI’s 3.0× spread is wider than the 2.7× between the Pecron and Goal Zero medians, so “which brand” is a weaker question than “which model”.

The LiFePO4 transition

Power stations built on lithium iron phosphate are typically rated for 3,000 to 6,000 cycles, against 500 to 1,000 for the NMC chemistry it replaced, and LiFePO4 tolerates sitting at full charge, at the cost of some energy per kilogram. With 92% of the models here on LiFePO4, the argument is effectively over, which makes the remaining holdouts the interesting part of this table rather than the leaders. See our explainer for what the difference means in use.

The EcoFlow row was corrected in October 2026. Our 20 August data counted six of its 15 units as non-LiFePO4, but for five of them our data held no chemistry at all. EcoFlow’s own spec pages settle all six. The RIVER 3 is LiFePO4, rated 3,000 cycles to 80% capacity, and the DELTA Pro and DELTA Pro Ultra are LFP, both rated 3,500 cycles to 80%. The other three are lithium-ion: the original RIVER (500 cycles to 80%), the original DELTA (800 cycles to 80%) and the RIVER mini (NCM, 500 cycles).

Set against the 3,000 cycles EcoFlow quotes for the RIVER 2 and RIVER 3, that is the chemistry change in one brand’s own numbers. EcoFlow’s cycle median, blank before, is 3,000, from eight published ratings. Its five DELTA 3 models in the index quote a lifespan of about 10 years instead of a cycle count, so they are not in that median, and neither are its two 5 kWh batteries, which should not be in the index at all (see known issues).

Does buying bigger cost less per watt-hour?

Up to a point, and then it reverses. Cost per watt-hour falls steeply out of the smallest class — $0.89/Wh is the price of making something light and small — bottoms out at $0.44/Wh in the 1,200–2,600Wh class, only about 10% below the $0.49 of the classes either side, then climbs to $0.63/Wh at 5,000Wh and up, a class of only six units. The largest units carry expandability, transfer switching and higher-current electronics that the middle of the market does not, and you pay for that whether or not you use it.

So the sizing advice that follows from this is narrower than the usual “buy bigger than you think”. Buy up to the 1,200–2,600Wh class if you can use it, because that is where the median cost per watt-hour is lowest. Past it, only buy what the job needs.

What this means if you are buying

• Compare on cost per watt-hour, not on headline price. Divide the price by the capacity in Wh; it takes five seconds and reorders most shortlists.
• Brand loyalty is worth less than it looks. With a 3× internal spread at BLUETTI, the model matters as much as the badge.
• Treat anything that is not LiFePO4 at this point as needing a specific reason — usually weight.
• The lowest median cost per watt-hour sits in the 1,200–2,600Wh class, though only about 10% below the classes either side. The large premiums are under 600Wh, where you pay for portability, and at 5,000Wh and up. Size into that band if the job allows.

Answer five questions and we will score the power stations we track against your own load, or compare every model side by side.

Method and limitations

Prices are manufacturer list prices captured from each brand’s own listings, not street prices, and not adjusted for the discounting that runs through this category almost continuously — so read these as relative positions rather than as what you will pay this week. Capacities and chemistries are the manufacturers’ own published figures and are not independently measured; where a manufacturer publishes nothing, the unit is excluded from that measure rather than estimated. Cycle counts are quoted to differing standards between brands, usually to 80% of original capacity but not always, so the cycle column is the weakest in the study, and some of its medians rest on very few ratings: two for ALLPOWERS and three for Goal Zero. The study covers the brands sold widely in the United States and is not a census of the world market.

The figures are recalculated as prices and models change, and the date at the top is when the prices used here were collected.

Known issues in the 20 August data

Updated 15 October 2026. Every price on this page is still from the 20 August 2026 capture. Two problems were fixed in October. The EcoFlow chemistry count is explained under the LiFePO4 table. BLUETTI’s priciest row, $1.859/Wh, was a two-pack of the Elite 10 Mini priced for two units against one unit’s capacity. BLUETTI rates the Elite 10 Mini at 128 Wh, so the pair holds 256 Wh and works out at $0.93/Wh, the same as one unit. BLUETTI’s priciest unit is then the 900 Wh Pioneer Na at $0.999/Wh, and its spread is 3.0×, not 5.5×. Its brand median and the class medians do not change.

Three brands still include rows that break the method. They have not been recalculated yet:

• Goal Zero. Its cheapest row, $0.501/Wh, is the Tank PRO 4000, which Goal Zero sells as an expansion battery for the Yeti PRO, so our own rule should have excluded it. Its priciest, $1.502/Wh, is the Yeti PRO 8000 counted at 3,994 Wh; Goal Zero rates it at 7,988 Wh, a Yeti PRO 4000 plus a Tank PRO 4000, which is $0.751/Wh. With both fixed, Goal Zero’s median stays at $1.00 but its range narrows to $0.69–$1.18 (1.7×). The index would drop to 90 units (88 in the brand tables), the 2,600–5,000Wh class would lose two units and the 5,000Wh-and-up class would gain one.
• EcoFlow. Its cheapest row, $0.350/Wh, is EcoFlow’s 5kWh LFP Battery, which EcoFlow sells for upgrading its power stations. A second battery, the Power Kits 5kWh LFP Battery, sold for building an EcoFlow Power Kit, is also counted. Four other EcoFlow rows are solar-generator listings with panels in the price: DELTA with a 220W panel, DELTA Pro with a 400W panel, and the DELTA 3 Classic and DELTA 3 Max Plus kits. The batteries pull EcoFlow’s cheapest figure down and the panels push those four rows up, so treat its $0.800 median and 3.5× spread as approximate.
• Jackery. Its priciest row, $1.969/Wh, is the Solar Generator 300, which Jackery sells as the Jackery 300 with a SolarSaga 100W panel, so its 4.7× spread overstates the gap between the stations alone.

Until the next full price capture, the tables above keep the 20 August set of units, so every price still traces to that capture.