Anker SOLIX C300 vs Anker 757 PowerHouse
Side-by-side on the specs that decide it — surge, capacity, runtime and price.
Both models' specs verified against manufacturer listings · Last updated
The short answer
Anker SOLIX C300 costs $820 less. Whether that gap is worth closing depends on what you need to run.
- Anker 757 PowerHouse holds 327% more energy (1229Wh vs 288Wh), so it runs the same load proportionally longer.
- Anker 757 PowerHouse has 1800W more surge headroom (2400W vs 600W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker SOLIX C300 is 35.3 lb lighter (8.6 lb vs 43.9 lb).
Neither of these will start a sump pump or well pump — both surge below the ~3,400W those motors need. If home backup with pumps is your use case, look at higher-surge models instead of either of these.
Anker's smallest. 288Wh at $179 with three USB-C ports — aimed squarely at people charging modern devices, not running appliances.
Best for: Content creators and travelers with a bag full of USB-C gear.
Where it falls short:
- 300W output is device-only territory
- 100W solar input
Anker's older flagship, now a discount play. Solid and durable, but heavy for its capacity and outclassed on charge speed by the newer C-series.
Best for: Buyers who find it discounted below the newer Anker C1000.
Where it falls short:
- 43.9 lb for 1.2kWh is heavy
- 300W solar input is low
- Outclassed by the newer C1000
| Spec | Anker SOLIX C300 | Anker 757 PowerHouse |
|---|---|---|
| Price | $179 | $999 |
| Capacity | 288 Wh | 1229 Wh |
| Continuous output | 300 W | 1500 W |
| Surge output | 600 W | 2400 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 8.6 lb | 43.9 lb |
| Max solar | 100 W | 300 W |
| Recharge time (faster wins) | 1h | 1h 30m |
Runtime head-to-head
| Appliance | Anker SOLIX C300 | Anker 757 PowerHouse |
|---|---|---|
| Refrigerator | ❌ | 17.4 hrs |
| Mini fridge | 7.8 hrs | 33.2 hrs |
| Chest freezer | ❌ | 13.1 hrs |
| CPAP machine | 6.1 hrs | 26.1 hrs |
| Sump pump | ❌ | ❌ |