Anker SOLIX C300 vs BLUETTI AC50B
Technical comparison · Ultraportable
Two ultraportables with distant output: the Anker SOLIX C300 at 300 W and 4.13 kg, the BLUETTI AC50B at 700 W and 6.7 kg, going by manufacturer-declared figures. The warranty is the same, 5 years, so it comes down to how much weight you will carry for more power.
| Parameter | ||
|---|---|---|
| In brief | ||
| Nominal capacity | 0.288 kWh | 0.448 kWh |
| Continuous output | 300 W | 700 W |
| Peak output | 600 W | 1000 W |
| Cell chemistry | LFP (lithium iron phosphate) | LFP (lithium iron phosphate) |
| Cost per kWh | 937.47 €/kWh | 912.95 €/kWh |
| List price | 269.99 € | 409 € |
| Weight | 4.13 kg | 6.7 kg |
| Outlets | ||
| AC outlets | — | Yes |
| How long it lasts | ||
| Battery life cycles | 1825 cicli | 1825 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 | 5 anni |
| The numbers | ||
| Cost of stored energy | 0.514 €/kWh | 0.5 €/kWh |
| Energy density | 69.7 Wh/kg | 66.9 Wh/kg |
| Power-to-capacity ratio | 1.04 C | 1.56 C |
| Identity | ||
| Use tier | F1 — Outlet-sized (up to 1 kWh) | F1 — Outlet-sized (up to 1 kWh) |
| Category specs | ||
| Expandable | No | Yes |
| Fastest USB-C | 140 W | 65 W |
| Maximum charge power | 0.33 kW | 0.58 kW |
| 0–80% charge time | 50 min | 45 min |
| Maximum solar input | 100 W | 200 W |
| Backup power | UPS | UPS |
| Switchover time | 10 ms | 20 ms |
| Mounting | Portable | Portable |
| Minimum temperature | -20 °C | -20 °C |
| Maximum temperature | 40 °C | 40 °C |
| Noise level | 25 dB | — |
| App required for setup | — | No |
The differences that matter
- Continuous output, 300 W vs 700 W → a resistive appliance between 300 and 700 W runs only on the second.
- Capacity, 288 Wh vs 448 Wh → at a 100 W load, about 2.9 hours against 4.5.
- Maximum charge power, 330 W vs 580 W → the second fills up faster from the wall.
- Weight, 4.13 kg vs 6.7 kg → the first is 2.5 kg lighter to carry every time you move it.
Which one to choose
Choose Anker SOLIX C300 if…
you carry the battery by hand every day and charge a laptop at 140 W over USB-C: 4.13 kg, 288 Wh and 25 dB of noise. You accept a 300 W limit, a 100 W solar input and no way to expand.
Choose BLUETTI AC50B if…
you need to power devices up to 700 W or refill quickly, with a maximum charge power of 580 W, a 200 W solar input and possible expansion: 448 Wh. You accept 6.7 kg and a 65 W USB-C port.
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.