EcoFlow RIVER 2
- AC delivered · est.
218 Wh. Show source
estimated sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗2026-07-27- output
300 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- surge
600 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- weight
3.5 kg. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗
Balanced
#8 of 14
in the Ultraportable / carry class
Lifted by Charging & solar and Durability & longevity; held back by capacity & expansion.
Check current availability and pricing at the retailer.
Check price on AmazonSee alternatives to the EcoFlow RIVER 2 →At a glance
EcoFlow RIVER 2 is a ultraportable / carry model best suited to camper. It supplies 300 W of continuous AC output. BatteryRank scores it 50 out of 100 within its size class.
Our verdict on the EcoFlow RIVER 2
The smallest AC-capable unit in the EcoFlow line and one of the smallest we track: 256 Wh behind a 300 W inverter, in a 3.5 kg body. Like every unit at this scale the inverter, not the battery, sets the boundary — a load fits under 300 W or it does not run. Two AC sockets share that budget. The 110 W solar ceiling is genuinely low, which limits it as an off-grid companion more than the pack size does.
- You want the lightest thing that still has real mains sockets3.5 kg with 2 AC outlets puts pure sine wave power in a daypack, which a USB power bank of any size cannot do.
- You are keeping small electronics alive rather than appliancesLaptops, cameras, routers and phones all sit well under the 300 W ceiling, and 256 Wh covers several days of intermittent use for that class of load.
- Anything you own draws more than 300 WThis is a hard limit, not a runtime question — a 1,000 W kettle or a 700 W microwave is more than triple the continuous rating and simply will not start. The Elite 100 V2 offers 1,800 W continuous and 1,024 Wh.
- You need to start something with a brief spikeA 600 W surge ceiling gives only 300 W of headroom, which is not enough for most compressor or pump starts even where the running draw would fit. The Mega 1 reaches 4,500 W of surge against 600 W here.
The honest limit: EcoFlow positions the RIVER line around solar portability, and at 3.5 kg the portability half is unarguable. The solar half is weaker than the framing suggests: a 110 W input ceiling is the lowest we hold, so even a small folding panel will be throttled by the unit rather than by the weather. Off-grid replenishment is slow by design here.
What our data can’t tell you: We hold no UPS switchover time, no wall-recharge figure, no noise reading and no usable-capacity value for this model. The absent recharge time is the practical gap: on a 256 Wh pack the refill should be quick, but quick is an assumption rather than something our sourced data establishes.
BatteryRank Engineering Team · Last reviewed · Method
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
256 Wh. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗2026-07-27The marketing number — total cell capacity.
218 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 3.0 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.5 nights | 56 W · |
| Refrigerator (full-size) | about 3.5 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 12 hours | 18 W · |
| Laptop (65W charger) | about 6.7 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 10 full charges | 20 W · |
Who it fits
Mechanical matches against this model's own sourced specs — never invented sentiment, never a guess on a spec we don't have.
3.5 kg with 110 W solar input → carry-in, solar-rechargeable
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
est.Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
42% dataOwner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
est.Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
62% dataLightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Rated cycle life
3,000 cycles. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- Rated capacity
256 Wh. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- Cycle-life threshold
80 %. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
300 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- Surge power output
600 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- AC outlets
2 outlets. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- USB-A ports
2 ports. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- USB-C ports
1 ports. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- USB-C max output
60 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- 12V car ports
1 ports. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- DC barrel ports
0 ports. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
How many car-socket (cigarette-lighter) style 12V outputs are built in — what CPAPs and car fridges plug into for the most efficient overnight running.
How many round barrel-style DC outputs are built in, used by routers, some lights, and older electronics.
Charging & solar
- AC recharge speed
360 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗- Max solar input
110 W. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗
How fast the unit recharges from a wall outlet — higher means shorter waits between uses.
The most solar panel wattage the unit can accept — undersized panels just mean slower charging, not damage, but oversizing this is wasted money.
Size & portability
- Weight
3.5 kg. Show source
claimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
What else to consider instead of the EcoFlow RIVER 2
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the EcoFlow RIVER 2 at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- Goal Zero Yeti 300score 71 · same size class
- Why you would switch
- The Goal Zero Yeti 300 delivers 16% more usable AC energy (252 Wh vs 218 Wh).
- What you give up
- The EcoFlow RIVER 2 is 44% lighter (3.5 kg vs 6.2 kg).
- EcoFlow RIVER 3 Plusscore 65 · same size class
- Why you would switch
- The EcoFlow RIVER 3 Plus delivers 11% more usable AC energy (243 Wh vs 218 Wh).
- What you give up
- The EcoFlow RIVER 2 is 26% lighter (3.5 kg vs 4.72 kg).
- Bluetti Elite 30 V2score 63 · same size class
- Why you would switch
- The Bluetti Elite 30 V2 delivers 12% more usable AC energy (245 Wh vs 218 Wh).
- What you give up
- The EcoFlow RIVER 2 is 19% lighter (3.5 kg vs 4.3 kg).
- Anker SOLIX C300score 62 · same size class
- Why you would switch
- The Anker SOLIX C300 delivers 23% more usable AC energy (269 Wh vs 218 Wh).
- What you give up
- The EcoFlow RIVER 2 is 15% lighter (3.5 kg vs 4.1 kg).
- EcoFlow RIVER 3score 55 · same size class
- Why you would switch
- Nothing in the sourced data separates it from the EcoFlow RIVER 2 by a margin worth acting on.
- What you give up
- The EcoFlow RIVER 2 reaches a full AC charge in 43 minutes against 60.
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the EcoFlow RIVER 2 weigh?
- 3.5 kg (7.7 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the EcoFlow RIVER 2?
- 245 × 215 × 145 mm (9.6 × 8.5 × 5.7 in), length × width × height, manufacturer-claimed.
- How much capacity does the EcoFlow RIVER 2 deliver through an AC outlet?
- About 218 Wh of the rated 256 Wh reaches an AC outlet from a full charge — an estimate after our published 15% inverter-loss constant (marked est. on this page).
- How many watts can the EcoFlow RIVER 2 output?
- 300 W continuous AC output and 600 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- How much solar input can the EcoFlow RIVER 2 accept?
- 110 W maximum solar input, manufacturer-claimed. Actual harvest depends on panel compatibility, sun, orientation, temperature, and conversion losses.
- What is the cycle-life rating of the EcoFlow RIVER 2?
- 3,000 cycles to 80% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.