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Anker SOLIX C300X
#6 of 7 in small · #42 of 56 overall · all Anker SOLIX models
3.1
Three AC outlets and a 140W USB-C port in a sub-10 lb unit.
288 Whcapacity
300 Wcontinuous output
LiFePO43,000 cycles
9.3 lbweight
$219street price, being verified
Runs a 500 W load about 0.5 h$760 per kWh of capacityFull AC recharge in about 1.2 hUPS switchover 20 ms
Ratings
Includes independent measurements from OutdoorGearLab, The Solar Lab.
Each rating places this unit among the others on a 0.5–5 scale, within its size class for the measures that scale with size and across the whole catalog for the rest. Weighted together they give the overall 3.1. Formula and weights.
Specifications
- Capacity
- 288 Wh
- Max expanded
- 288 Wh
- AC output
- 300 W continuous
- Surge
- 600 W
- Chemistry
- LiFePO4
- Cycle rating
- 3,000
- Weight
- 9.3 lb
- AC recharge
- 280 W
- Solar input
- 100 W
- UPS switchover
- 20 ms
- AC outlets
- 3
- USB-C PD max
- 140 W
- 240V output
- No
- App
- Yes
- Price per kWh
- $760
- Released
- 2024
Independent measurements
| Metric | Value | Source |
|---|---|---|
| Runtime efficiency Runtime-based: 300W load ran about 50 min from full vs ~57 min expected from rated 288 Wh | 87 % | The Solar Lab |
| AC recharge time 0-100% on a wall outlet (1 h 8 min); input power not reported | 68 min | The Solar Lab |
| Sustained output 300W load held ~50 min to empty; slightly higher loads ran but unit was not happy (no figures) | 300 W | The Solar Lab |
| Usable capacity, % of rated Page titled Anker Solix C300 but describes the 3-AC-outlet 288 Wh unit (i.e. the C300X AC model); light-bar load bank through AC outlets; 230 Wh delivered of 288 rated | 80 % | OutdoorGearLab 2026-07 |
| AC recharge time 0-100% with the supplied AC cord; table rounds to 1.1 h at 274 Wh/h average; same model caveat as capacity row | 63 min | OutdoorGearLab 2026-07 |
How it compares with its neighbors
| # | Model | Wh | AC W | Chem. | Cycles | lb | AC in W | Solar W | $/kWh | Score |
|---|---|---|---|---|---|---|---|---|---|---|
| 3 | EcoFlow River 3 | 245 | 300 | LiFePO4 | 3,000 | 7.3 | 300 | 110 | 771 | 3.5 |
| 4 | Jackery Explorer 300 Plus | 288 | 300 | LiFePO4 | 3,000 | 8.3 | 150 | 100 | 691 | 3.4 |
| 5 | EcoFlow River 3 Plus | 286 | 600 | LiFePO4 | 3,000 | 10.3 | 400 | 220 | 941 | 3.3 |
| 6 | Anker SOLIX C300X | 288 | 300 | LiFePO4 | 3,000 | 9.3 | 280 | 100 | 760 | 3.1 |
| 7 | EcoFlow River 2 | 256 | 300 | LiFePO4 | 3,000 | 7.7 | 360 | 110 | 777 | 3.1 |