EcoFlow RIVER 2 Max 500
#2 in SmallFull review
A 500Wh LiFePO4 station for camping, CPAP and short power outages. A good middle step between the small RIVER models and the DELTA line.
Amazon $308.99 EcoFlow $329$308.99
4.0/5
A cheap, light LiFePO4 station for phones, laptops, lights and a router during outages. Pick something bigger if you need more than one AC plug or more than 300W.
- 256 WhCapacity
- 300 WAC output
- 7.9 lbWeight
- LiFePO4Battery
- 1 hFull charge
- $0.48Price / Wh
Check price at Amazon$122.55
Price checked October 20, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Under 8 lb, easy to carry to a campsite or keep in a car
- LiFePO4 battery rated for 4,000+ cycles
- Runs as a UPS for a router or modem during short outages
- Very low price per watt-hour
Cons
- Only one AC outlet
- 300W limit rules out kettles, hair dryers and most tools
- A reviewer measured a 16 ms UPS switchover and owners report the AC output switching itself off at light loads
- No independent capacity test of the US 120V model
How it scores
The rating comes from 8 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Battery | |
|---|---|
| Rated capacity | 256 Wh |
| Chemistry | LiFePO4 |
| Cycle life | 4,000 4,000+ cycles (manufacturer; end-of-life capacity not stated on the US page) |
| Expandable | No |
| Output | |
| AC output | 300 W (600 W surge) |
| AC outlets | 1 total |
| 120V 15A outlets (NEMA 5-15R) | 1 |
| AC waveform | Pure sine wave |
| USB-C ports | 1 (100 W) |
| USB-A ports | 2 |
| 12 V car outlet | Yes |
| UPS / pass-through | Yes (20 ms switchover) |
| Charging | |
| AC charging | 300 W |
| Full AC charge time | 1 h (manufacturer spec table; the Amazon listing says as little as 2 hours) |
| Max solar input | 110 W |
| Solar input voltage | 11-30V, 8A (XT60) |
| Car charging | 110 W |
| Build | |
| Weight | 7.9 lb (3.6 kg) |
| Dimensions | 10.2 x 8.2 x 4.9 in |
| App | ALLPOWERS app (Wi-Fi/Bluetooth) |
| Warranty | 5 years |
Alternatives in this size
PECRON E300LFP
#3 in SmallFull review
A small, inexpensive LiFePO4 station for charging phones, laptops and camera gear, or running a CPAP for a night. Pick something bigger if you need to run kitchen appliances.
Amazon $179 Pecron $179$179
BLUETTI Elite 30 V2
#4 in SmallFull review
For campers and remote workers who want a light LiFePO4 unit for laptops, lights and small devices, with a long warranty.
Amazon $279.99 BLUETTI $289.99$279.99
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