Anker SOLIX C300 vs EcoFlow RIVER 3
Technical comparison · Ultraportable
The two share 300 W continuous, a 600 W peak and a similar weight; what changes is the warranty, 5 years for the Anker SOLIX C300 and 2 for the EcoFlow RIVER 3, and the noise, going by manufacturer-declared figures. Anyone keeping one for years will look mostly at the first difference.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 0.288 kWh | 0.245 kWh |
| Continuous output | 300 W | 300 W |
| Peak output | 600 W | 600 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 937.47 €/kWh | 1057.14 €/kWh |
| List price | 269.99 € | 259 € |
| Weight | 4.13 kg | 3.5 kg |
| Dimensions (W×D×H) | — | 25.5 × 21.2 × 11.3 cm |
| Outlets | ||
| AC outlets | — | Yes |
| How long it lasts | ||
| Battery life cycles | 1825 cicli | 730 cicli |
| The limit that runs out first | anni di garanzia | anni di garanzia |
| Rated cycles | 3000 cicli | 3000 cicli |
| Capacity at end of cycle life | 80 % | 80 % |
| Warranty | 5 anni | 2 anni |
| The numbers | ||
| Cost of stored energy | 0.514 €/kWh | 1.448 €/kWh |
| Energy density | 69.7 Wh/kg | 70 Wh/kg |
| Power-to-capacity ratio | 1.04 C | 1.22 C |
| Identity | ||
| Use tier | F1 — Outlet-sized (up to 1 kWh) | F1 — Outlet-sized (up to 1 kWh) |
| Price | ||
| Price | — | ~200–450 € |
| Category specs | ||
| Expandable | No | — |
| Fastest USB-C | 140 W | 100 W |
| Maximum charge power | 0.33 kW | 0.305 kW |
| 0–80% charge time | 50 min | — |
| Maximum solar input | 100 W | 110 W |
| Backup power | UPS | UPS |
| Switchover time | 10 ms | 10 ms |
| Mounting | Portable | Portable |
| Minimum temperature | -20 °C | — |
| Maximum temperature | 40 °C | — |
| Noise level | 25 dB | 30 dB |
The differences that matter
- Warranty, 5 years vs 2 → after two years the second is uncovered; the first still has three.
- USB-C, 140 W vs 100 W → a demanding laptop charges at full speed only from the first.
- Noise, 25 dB vs 30 dB → in a quiet room the first is even more discreet.
- Weight, 4.13 kg vs 3.5 kg → about 600 g more to carry with the first.
Which one to choose
Choose Anker SOLIX C300 if…
you use it daily to charge a laptop over USB-C at 140 W and want it quiet, at 25 dB beside the bed or desk: 288 Wh and a 5-year warranty. You accept 4.13 kg, a 100 W solar input and no way to expand it.
Choose EcoFlow RIVER 3 if…
you want the lightest one, 3.5 kg, with 245 Wh and a 110 W solar input. You accept a 2-year warranty, a USB-C port that stops at 100 W and 30 dB of noise.
Where to buy
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The purchase links are the same as on the two product pages and don't influence the verdict. The product pages have the complete data.