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EcoFlow RIVER 2 Max 500 Review
499Wh of storage, 500W continuous output, LiFePO4 cells. Listed at $309 at EcoFlow.
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The EcoFlow RIVER 2 Max 500 is a portable under 600wh unit holding 499Wh. At $0.62 per watt-hour it is priced below the median for the band, which makes it one of the cheaper ways to buy this much capacity. It uses LiFePO4 cells, so it is built to be kept rather than replaced.
Price and stock are shown on Amazon. We may earn a commission, which never changes what the figures say.
Arithmetic on the maker’s published specification; we have not tested this unit. Method and the full comparison are in our power station price index.
What the EcoFlow RIVER 2 Max 500 will run, and for how long
Runtimes below are calculated from the 499Wh rated capacity, derated to 85% for AC loads and 92% for USB and 12V loads to cover inverter and conversion losses. They are arithmetic, not lab measurements, but they are the same arithmetic applied to every unit we track, so the comparison holds. Anything drawing more than the 500W continuous rating is left off the list because this unit cannot carry it, though the 1,000W surge rating covers brief startup spikes from motors and compressors.
| Load | Estimated runtime |
|---|---|
| Phone charge (12Wh) | 38 charges |
| Wi-Fi router (10W) | 42 hr |
| LED work light (10W) | 46 hr |
| CPAP, humidifier off (40W) | 10 hr 36 min |
| Laptop (60W) | 7 hr 4 min |
| 12V portable fridge (45W avg) | 9 hr 26 min |
| 55-inch TV (90W) | 4 hr 43 min |
Real figures land below these. A fridge cycles rather than drawing continuously, and cold weather costs a lithium pack usable capacity, so treat the table as the ceiling rather than the expectation.
EcoFlow RIVER 2 Max 500 specifications
Manufacturer figures, gathered so you can read them against everything else we track rather than against the marketing page they came from.
| Capacity | 499Wh |
| Continuous AC output | 500W |
| Surge / peak | 1,000W |
| Cell chemistry | LiFePO4 |
| Weight | 13.4 lb |
| Price at EcoFlow | $309 |
| Cost per watt-hour | $0.62 |
How the EcoFlow RIVER 2 Max 500 compares
The closest units we track from other manufacturers in the same band, matched on capacity rather than on price.
| EcoFlow RIVER 2 Max 500 | Goal Zero Yeti 500 | BLUETTI AC50P | |
|---|---|---|---|
| Capacity | 499Wh | 499Wh | 504Wh |
| Output | 500W | 182W | 700W |
| Cycle life | — | 4,000 cycles | 3,000 cycles |
| Weight | 13 lb | 16 lb | 15 lb |
| Price | $309 | $499.95 | $339 |
| Cost per watt-hour | $0.62 | $1 | $0.67 |
Where the EcoFlow RIVER 2 Max 500 sits in its band
We track 36 units in the portable under 600wh band with both a price and a published capacity. They run from $118 to $599.95, and from 128Wh to 576Wh. On cost per watt-hour the EcoFlow RIVER 2 Max 500 ranks 5 of 36, where 1 is the cheapest capacity in the band. That puts it in the cheapest third, which is the single strongest thing on its spec sheet. Ranking on cost per watt-hour deliberately ignores build quality, port selection and warranty, so read it as one input rather than as the answer.
Alternatives to the EcoFlow RIVER 2 Max 500
Units we track in the same band that are close enough to be genuine substitutes, matched on capacity. Each links to its own review.
- Goal Zero Yeti 500 review — 499Wh, 182W output, listed at $499.95, $1 per watt-hour, dearer capacity than the EcoFlow RIVER 2 Max 500.
- BLUETTI AC50P review — 504Wh, 700W output, listed at $339, $0.67 per watt-hour, dearer capacity than the EcoFlow RIVER 2 Max 500.
- Anker SOLIX 535 PowerHouse review — 512Wh, 500W output, listed at $209, $0.41 per watt-hour, cheaper capacity than the EcoFlow RIVER 2 Max 500.
- OUPES Exodus 600 Plus review — 512Wh, 600W output, listed at $349, $0.68 per watt-hour, dearer capacity than the EcoFlow RIVER 2 Max 500.
Who the EcoFlow RIVER 2 Max 500 suits
It is a sensible buy for weekend camping, a CPAP overnight, phones and laptops, and keeping a router alive through a short outage. It is the wrong tool for anything with a heating element, and any attempt to run a fridge for more than a day.
EcoFlow RIVER 2 Max 500 questions
How long will the EcoFlow RIVER 2 Max 500 run a fridge?
A full-size fridge averages about 50W once you account for the compressor cycling on and off. From 499Wh, derated to 85% for inverter losses, that is roughly 8 hr 29 min on a full charge. A 12V portable fridge draws less and will run considerably longer.
Can the EcoFlow RIVER 2 Max 500 be charged by solar?
EcoFlow does not publish a maximum solar input for this model. Rather than estimate one, we leave it out. Check the manual that ships with the unit before buying panels for it.
Is the EcoFlow RIVER 2 Max 500 worth it?
At $309 it works out at $0.62 per watt-hour. It costs less per watt-hour than the median unit in its band, which is the strongest argument in its favour. Read the comparison table above against the two closest rivals before deciding.
What is not published
EcoFlow does not state the rated cycle life, the maximum solar input, the warranty term for this model. We list figures rather than estimate them, so those rows stay empty until the manufacturer publishes them. If you need one of them to make the decision, ask EcoFlow directly and hold them to the answer.
How we assess these
Every figure on this page comes from the manufacturer, and every derived number, cost per watt-hour and estimated runtime, is calculated the same way for all 437 products we track. That is what makes the comparison meaningful: we are not scoring units against a private impression of them, we are putting published figures side by side and doing the arithmetic in public. Where a manufacturer stays quiet, we say so rather than filling the gap.