For buyers who want the most output for the money and will use it occasionally. Anyone planning daily cycling or full-power home backup should choose a LiFePO4 unit.
Amazon $559The ALLPOWERS S2000 Pro rates 4.1 among mid-size portable power stations; the Anker SOLIX F1500 rates 3.5 among large ones. The ALLPOWERS S2000 Pro costs $40.99 less ($559 vs $599.99).

For campers and RV owners who want a lot of LiFePO4 capacity for the money and can live with slower charging and extra weight.
Amazon $599.99 Anker SOLIX $599.99Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different size classes (mid-size and large), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | ALLPOWERS S2000 Pro | Anker SOLIX F1500 |
|---|---|---|
| Overall rating | 4.1/5 | 3.5/5 |
| Value 25% | 95 $0.39 per rated Wh | 86 $0.39 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 14 73% of rated capacity delivered (1 test) |
| Battery life 15% | 47 NMC (ternary lithium), 2,500 cycles, 5-year warranty | 91 LiFePO4, 3,000 cycles, 5-year warranty |
| AC output 15% | 100 2,400 W continuous AC | 21 1,800 W continuous AC |
| Charging speed 10% | 50 full AC charge time not published (neutral score used) | 68 0-100% on AC in 1 h 50 min |
| Portability 10% | 100 112 Wh per kg (28.7 lb (13 kg)) | 59 78 Wh per kg (43.7 lb (19.8 kg)) |
| Solar input 5% | 63 1,000 W max solar input | 28 600 W max solar input |
| Features 5% | 75 UPS (15 ms), 100 W USB-C, app | 75 UPS (20 ms), 100 W USB-C, app |
Independent capacity tests
ALLPOWERS S2000 Pro
No independent test published yet.
Anker SOLIX F1500
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 73% | 1,585W load ran 42 minutes against a theoretical 58; high load lowers efficiency. Measured AC recharge about 1 h 50 min. |
Specifications
| ALLPOWERS S2000 Pro | Anker SOLIX F1500 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,451 Wh | 1,536 Wh |
| Tested usable capacity | - | 1,121 Wh (73%) |
| Chemistry | NMC (ternary lithium) | LiFePO4 |
| Cycle life | 2,500 to 80% | 3,000 to 80% |
| Expandable | No | No |
| Output | ||
| AC output | 2,400 W (4,000 W surge) | 1,800 W (2,400 W surge) |
| AC outlets | 4 total | 6 total |
| 120V 15A outlets (NEMA 5-15R) | 4 | 3 |
| 120V 2-prong outlets (NEMA 1-15R) | - | 3 |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 4 | 4 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | - |
| UPS / pass-through | Yes (15 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 1,500 W | 1,000 W |
| Full AC charge time | - | 1 h 50 min (measured by The Solar Lab at 1,000W; Anker does not publish a full AC charge time) |
| Max solar input | 1,000 W | 600 W |
| Solar input voltage | 12-150V, 13A | 11-60V |
| Car charging | - | 120 W |
| Build | ||
| Weight | 28.7 lb (13 kg) | 43.7 lb (19.8 kg) |
| Dimensions | 14.76 x 9.64 x 9.84 in | 18.2 x 11.3 x 9.3 in |
| App | ALLPOWERS app (Bluetooth) | Anker app |
| Warranty | 5 years | 5 years |
| Released | 2024-01 | 2023-11 |