Anker SOLIX C800 vs Anker SOLIX C300
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 $420 less. Whether that gap is worth closing depends on what you need to run.
- Anker SOLIX C800 holds 167% more energy (768Wh vs 288Wh), so it runs the same load proportionally longer.
- Anker SOLIX C800 has 1000W more surge headroom (1600W vs 600W) — that decides whether a fridge, pump or AC compressor will actually start.
- Anker SOLIX C300 is 16.3 lb lighter (8.6 lb vs 24.9 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.
The C1000's smaller sibling. Same fast-charging DNA at a lower price, but the 768Wh capacity puts it firmly in weekend-trip territory.
Best for: Campers and van-lifers powering electronics, lights and a mini fridge — not home backup.
Where it falls short:
- 300W solar input is low — slow to top off off-grid
- 1600W surge rules out most motor-driven appliances
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
| Spec | Anker SOLIX C800 | Anker SOLIX C300 |
|---|---|---|
| Price | $599 | $179 |
| Capacity | 768 Wh | 288 Wh |
| Continuous output | 1200 W | 300 W |
| Surge output | 1600 W | 600 W |
| Battery | LiFePO4 | LiFePO4 |
| Rated cycles | 3,000 | 3,000 |
| Weight (lighter wins) | 24.9 lb | 8.6 lb |
| Max solar | 300 W | 100 W |
| Recharge time (faster wins) | 58 min | 1h |
Runtime head-to-head
| Appliance | Anker SOLIX C800 | Anker SOLIX C300 |
|---|---|---|
| Refrigerator | 10.9 hrs | ❌ |
| Mini fridge | 20.7 hrs | 7.8 hrs |
| Chest freezer | 8.2 hrs | ❌ |
| CPAP machine | 16.3 hrs | 6.1 hrs |
| Sump pump | ❌ | ❌ |