Camping & Overlanding
Car camping, weekend trips and vehicle-based travel
EcoFlow · Mid-size
EcoFlow RIVER 2 Max
512 Wh of storage, 500 W of continuous AC output, listed at $249. That works out to $0.49 per watt-hour and 38.2 watt-hours per pound.
512 Wh500 W AC13.4 lbLiFePO43,000 cycles
What this unit is for
An energy-technology company first and an outdoor brand second: the pitch is a smart, expandable energy ecosystem rather than a single box.
Best suited to: Buyers who want one system to grow from camping into home backup. Less suited to: Buyers who want the lowest cost per watt-hour and will never use an app.
Fridge for a day, camping for a weekend.
Specifications
13 of 19 fields are published by EcoFlow for this model. The rest are shown as “—” and are excluded from rankings rather than estimated.
| Capacity | 512 Wh |
|---|---|
| AC output (continuous) | 500 W |
| AC surge | 1 kW |
| Power lifting / boost | 1 kW |
| Battery chemistry | LiFePO4 |
| Rated cycles | 3,000 |
| Weight | 13.4 lb |
| AC recharge to full | 1 h |
| Max solar input | 220 W |
| AC outlets | — |
| USB-C ports | — |
| USB-A ports | — |
| 12V car port | — |
| UPS switchover | 30 ms |
| Max expandable capacity | — |
| Warranty | 60 months |
| Noise level | 62 dB |
| Ingress protection | — |
| Operating temp (low) | 14 °F |
| List price | $249 |
Where these numbers come from. Every figure on this page is taken from EcoFlow’s own product listing and is stored with the vendor’s exact wording, reproduced below. We do not estimate missing specs — a field the vendor does not publish is shown as “—” and excluded from rankings. Source: us.ecoflow.com/products/river-2-max-portable-power-station.
Vendor wording for each figure (13)
capacityWh: “Capacity => 512Wh”acOutputW: “AC Output => 120V 50Hz/60Hz, 500W (Surge 1000W)”acSurgeW: “(Surge 1000W)”powerLiftingW: “Crank it up to 1000W with X-Boost mode”chemistry: “LiFePO4 Battery Chemistry”cycleLife: “80%+ capacity after 3000 cycles”weight: “Approximately 13.4lbs”rechargeAcMinutes: “Charge 0-100% in only 60 mins”solarInputW: “11-50V, 13A, 220W Max”upsSwitchoverMs: “30ms switch-over mode”warrantyMonths: “5-year Warranty”noiseDb: “RIVER 2 Max may make a noise up to 62db”operatingTempF: “14°F to 113°F/-10°C to 45°C”
Where it ranks
All rankings →Position among all 76 models we track, in each dimension this unit publishes the inputs for.
| Dimension | Rank | Value |
|---|---|---|
| Best value (Wh per dollar) | #22 of 73 | $0.49 |
| Most portable (Wh per pound) | #34 of 74 | 38.2 Wh/lb |
| Most inverter headroom | #61 of 75 | 98 W/100Wh |
| Fastest AC recharge | #19 of 36 | 512 W |
| Highest solar input | #41 of 55 | 220 W |
| Longest service life | #47 of 65 | 1536 kWh |
| Most output per dollar | #38 of 72 | 2.01 W/$ |
| Best for home backup | #59 of 75 | 48/100 |
| Longest warranty | #12 of 75 | 60 mo |
| Quietest under load | #26 of 27 | 62 dB |
Who buys this brand, and why
Full EcoFlow profile →Who it is for
- Research-driven buyers who compare spec tables before they buy
- Van-lifers and RV owners building a system that can grow
- Homeowners who want a real backup plan, not just a camping box
- Creators and remote workers who need a UPS-grade desk setup
What they will pay extra for
- Fast charging over raw capacity
- A system that expands instead of being replaced
- App quality and firmware updates
- Breadth of accessories so every future need has a first-party answer
Honest drawbacks
- The ecosystem is the product — accessories are priced accordingly
- App dependency for features buyers may expect on the device
- Line-up churn means similar names differ a lot between generations
- Support experience is a recurring complaint in independent coverage
Fits these buying scenarios
Short Home Outages
Keeping the fridge, Wi-Fi and phones alive for hours
Mobile Work & Creators
Remote work, film and photo production away from mains
Elsewhere in the EcoFlow range
All EcoFlow models →
Closest rivals by capacity
Other brands’ models nearest in capacity — the units a buyer is most likely to be comparing against this one.
