ALLPOWERS S2000 Pro
#18 in Mid-sizeFull review
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 $559$559
The ALLPOWERS S2000 Pro rates 4.1 among mid-size portable power stations; the VTOMAN FlashSpeed 1500 rates 3.6 among large ones. The ALLPOWERS S2000 Pro costs $30 less ($559 vs $589).
VTOMAN FlashSpeed 1500
#27 in LargeFull review
A 1.5kWh LiFePO4 station with fast AC charging at a low price, good for home backup and RV use if you mostly recharge from the wall.
VTOMAN $589$589
Prices 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 | VTOMAN FlashSpeed 1500 |
|---|---|---|
| Overall rating | 4.1/5 | 3.6/5 |
| Value 25% | 95 $0.39 per rated Wh | 88 $0.38 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 37 78% of rated capacity delivered (1 test) |
| Battery life 15% | 47 NMC (ternary lithium), 2,500 cycles, 5-year warranty | 76 LiFePO4, 3,000 cycles, 2-year warranty |
| AC output 15% | 100 2,400 W continuous AC | 0 1,500 W continuous AC |
| Charging speed 10% | 50 full AC charge time not published (neutral score used) | 95 0-100% on AC in 1 h |
| Portability 10% | 100 112 Wh per kg (28.7 lb (13 kg)) | 68 82 Wh per kg (41.4 lb (18.8 kg)) |
| Solar input 5% | 63 1,000 W max solar input | 13 400 W max solar input |
| Features 5% | 75 UPS (15 ms), 100 W USB-C, app | 80 UPS (20 ms), expandable, 100 W USB-C |
Independent capacity tests
ALLPOWERS S2000 Pro
No independent test published yet.
VTOMAN FlashSpeed 1500
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| Techno-Science | 1,210 Wh | 78% | About 1,210Wh delivered into a ~1,040W hair-dryer load on the 230V EU version; recharge drew about 1,560Wh in roughly an hour. |
Specifications
| ALLPOWERS S2000 Pro | VTOMAN FlashSpeed 1500 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,451 Wh | 1,548 Wh |
| Tested usable capacity | - | 1,210 Wh (78%) |
| Chemistry | NMC (ternary lithium) | LiFePO4 |
| Cycle life | 2,500 to 80% | 3,000 to 80% |
| Expandable | No | Yes, up to 3,096 Wh |
| Output | ||
| AC output | 2,400 W (4,000 W surge) | 1,500 W (3,000 W surge) |
| AC outlets | 4 total | 3 total |
| 120V 15A outlets (NEMA 5-15R) | 4 | 3 |
| AC waveform | 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 | 2 |
| UPS / pass-through | Yes (15 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 1,500 W | 1,500 W |
| Full AC charge time | - | 1 h |
| Max solar input | 1,000 W | 400 W |
| Solar input voltage | 12-150V, 13A | 30-60V (Anderson) |
| Car charging | - | 200 W |
| Build | ||
| Weight | 28.7 lb (13 kg) | 41.4 lb (18.8 kg) |
| Dimensions | 14.76 x 9.64 x 9.84 in | 15.5 x 11 x 10.6 in |
| App | ALLPOWERS app (Bluetooth) | - |
| Warranty | 5 years | 2 years |
| Released | 2024-01 | 2023-08 |