Our Verdict
Anker SOLIX C300 Wins
It offers 288Wh capacity vs 256Wh, 3 AC outlets vs 2, and 140W two-way fast charging. Choose Anker 521 for slightly less weight at 8.16 lbs for comparable AC output.
Spec Comparison
12 specs compared
| Specification |  |  |
|---|---|---|
| Price | $130 | $215 |
| Rating | 4.4(3.0k) | 4.6(1.7k) |
| Capacity Wh | 256W | 288W |
| Chemistry | LiFePO4 | LiFePO4 |
| AC Output Watts | 300W | 300W |
| Dc Ports | 1 | 1 |
| AC Outlets | 2 | 3 |
| Weight | 8.16 lbs | 9.02 lbs |
| USB A Ports | 2 | 1 |
| USB C Ports | 1 | 3 |
| Peak Output Watts | 600W | 600W |
| Cycle Life | — | 3000 |
| Charge Time Hours | — | 0.83 hrs |
| Solar Input Watts | — | 100W |
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Pros & Cons
Quick overview of strengths and weaknesses
Anker Anker 521
- LiFePO4 battery provides 10-year lifespan
- Peak 600W output handles high-draw appliances
- 60W USB-C PD port recharges laptops quickly
- Six outputs: 2 AC, 1 USB-C PD, 2 USB-A, 1 DC
- 8.16 lbs unit weight impacts portability
- 256Wh capacity limits high-draw use cases
- Solar charging requires separate panel purchase
Anker Portable Power
- 288Wh capacity, 300W AC output (600W surge).
- 140W two-way USB-C port enables rapid charging.
- 8 output ports: 3 AC, 3 USB-C, 1 USB-A, 1 car.
- LiFePO4 battery rated for 3,000 charge cycles.
- Solar panel for recharging is not included.
- Not compatible with all Anker solar panel models.
- Only one of three USB-C ports offers 140W output.
Frequently Asked Questions
Common questions about this comparison
Which is better for outdoor camping?
The Anker SOLIX C300 is generally better for camping due to its higher 288Wh capacity, three AC outlets, and 140W two-way fast charging, allowing more devices to be powered and quicker recharges.
What's the main difference in capacity?
The Anker SOLIX C300 has a slightly higher capacity at 288Wh compared to the Anker 521's 256Wh. Both use a durable LiFePO4 battery chemistry, providing excellent longevity for repeated use.
Which power station charges faster?
The Anker SOLIX C300 charges significantly faster, reaching 80% capacity in 50 minutes via AC. It also features a powerful 140W two-way USB-C port, whereas the Anker 521's USB-C PD output is 60W.
How do the output ports compare?
The Anker SOLIX C300 offers more versatility with 8 output ports, including 3 AC outlets and 3 USB-C ports (one 140W). The Anker 521 has 6 outputs: 2 AC, 1 USB-C (60W), 2 USB-A, and 1 DC port.
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