With your power plan
Add your devices to see an estimate for this model.
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Where it makes sense
Build your device list first and compare the result with the separate energy and power limits.
The main trade-off
Carry less, but check whether the lower energy allowance covers your whole plan.
Know the limits
- Nameplate energy is not measured usable energy.
- This is RIVER 3 EFR705, not RIVER 3 (230), Plus or Max.
- The 550 W combined-output title on Amazon does not mean 550 W continuous AC.
- No particular UPS interruption tolerance or motor start is confirmed here.
Startup is a separate check. A 600 W peak/boost label is not a verified motor-start envelope. X-Boost is excluded from normal AC output.
How long for a steady load?
Estimate one constant AC load from the rated battery energy. This is a mathematical scenario, not a measured runtime or a startup check.
Use a constant load of at least 0.01 W, not a cycling appliance’s maximum watts.
Enter a load to calculate an estimate.
Default illustrative assumptions: 90% usable charge range, 85% conversion efficiency, 3 W output-equivalent idle draw. A saved plan supplies your own assumptions instead.
Formula: rated Wh × charge range × efficiency ÷ (load W + idle W). Excludes recharging, expansion batteries, temperature effects and age. Always check continuous output and relevant startup requirements separately.
Connections and shared limits
- 2 × 120 V AC outlets; 300 W total continuous
- 1 × USB-C output, up to 100 W
- 2 × USB-A outputs, up to 12 W each / 24 W total
- 1 × 12.6 V car-style output, up to 10 A / 126 W
Match your actual plugs, cable ratings, voltage and device instructions. The finder’s AC estimate does not assess USB-C charging negotiation or DC-path efficiency.
- Battery chemistry
- LiFePO₄ (LFP)
- Dimensions, with axis order
- 25.5 × 21.2 × 11.3 cm (W × D × H; approximate manufacturer dimensions)
Solar charging: the input limits
Up to 110 W · 11–30 V · 8 A maximum
The manual specifies 11–30 V, 8 A, 110 W and requires panel output below 30 V. A solar-to-XT60i cable and panel are separate.
These are manufacturer input ceilings. They do not predict solar harvest, charge time, connector compatibility or panel suitability in your conditions. Solar energy is not credited in the finder.
What we verified
We checked the model identity and the specifications below against manufacturer documents. We have not bought, physically tested, photographed or measured this model.
- EcoFlow RIVER 3 official user manual — Specifications, US/BR rows
- EFR705; US 120 V / 60 Hz, 300 W AC; 245 Wh; LFP; approximately 3.5 kg; dimensions and input/output limits.
Specifications can change. Match the model code and US electrical version on the current manufacturer page and product label before buying. Read our research and calculation method.
Amazon listing identity check
Amazon identifies EFR705, RIVER 3, 245 Wh, 120 V and 300 W AC; included items are one station, AC cable and guide. The 550 W title is combined output, not continuous AC. No solar panel is included. A live neutral-page check on November 13, 2026 confirmed the 245 Wh / 120 V / 300 W base unit.
Inspect the listing identity source
This identifies the researched listing, not current stock, seller, price or a guarantee against later variant changes. Check the selected model and included items at the retailer.