BatteryRank scores the EcoFlow RIVER 3 Plus higher overall — 66 vs 64, though the other unit leads on trust.
- Best for Home backup: EcoFlow RIVER 3 Plus
- Best for Camping & RV: Anker SOLIX C300
How they score
Computed from sourced data with a published, price-independent formula. Scores are relative to each model's size class.
Capacity truth
The watt-hours on the box aren't what reaches your devices. Same scale, both units.
The marketing number — total cell capacity.
~269 Wh usable via USB at 60W (Trusted Reviews) · 7% below the label
The marketing number — total cell capacity.
What reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
Key specs, side by side
| Spec | Anker SOLIX C300 | EcoFlow RIVER 3 Plus |
|---|---|---|
| Usable capacity | 288 Wh | 286 Wh |
| Continuous power output | 300 W | 600 W |
| Surge power output | 600 W | 1,200 W |
| Max solar input | 100 W | 220 W |
| AC charge time (0–100%) | — | 60 min |
| Weight | 4.1 kg | 4.72 kg |
| Rated cycle life | 3,000 cycles | 3,000 cycles |
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Hover any figure for its source.
Price & fair-price verdict
Each verdict compares today's price against that model's own tracked history — never MSRP theater.
Where these rank
- Anker SOLIX C300 #5 of 8 in Quietest Power Stations
- EcoFlow RIVER 3 Plus #3 Small / carry in Best Portable Power Stations