ALLPOWERS S2000 Pro
#15 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 ALLPOWERS $664$559
The ALLPOWERS S2000 Pro is the better portable power station overall, rated 4.1 to 4.1. The ALLPOWERS S2000 Pro leads on portability, value and solar input. The VTOMAN FlashSpeed 2400 wins on battery life. The ALLPOWERS S2000 Pro costs $140 less ($559 vs $699).
VTOMAN FlashSpeed 2400
#20 in Mid-sizeFull review
A high-output LiFePO4 station for running power-hungry appliances in short bursts and fast UPS backup. Buy a larger battery if runtime matters more than wattage.
Amazon $719.99 VTOMAN $699$699
Prices were last checked October 20, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the ALLPOWERS S2000 Pro for portability (112 Wh per kg (28.7 lb (13 kg)) vs 74 Wh per kg (41.9 lb (19 kg))), value ($0.39 per rated Wh vs $0.50 per rated Wh) and solar input (1,000 W max solar input vs 600 W max solar input).
- Choose the VTOMAN FlashSpeed 2400 for battery life (LiFePO4, 3,000 cycles, 2-year warranty vs NMC (ternary lithium), 2,500 cycles, 5-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | ALLPOWERS S2000 Pro | VTOMAN FlashSpeed 2400 |
|---|---|---|
| Overall rating | 4.1/5 | 4.1/5 |
| Value 25% | 95 $0.39 per rated Wh | 80 $0.50 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| 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 | 100 2,400 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)) | 53 74 Wh per kg (41.9 lb (19 kg)) |
| Solar input 5% | 63 1,000 W max solar input | 32 600 W max solar input |
| Features 5% | 75 UPS, 100 W USB-C, app | 55 UPS (10 ms), 100 W USB-C |
Specifications
| ALLPOWERS S2000 Pro | VTOMAN FlashSpeed 2400 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,451 Wh | 1,408 Wh |
| 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) | 2,400 W (3,200 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 | - | 2 |
| UPS / pass-through | Yes | Yes (10 ms switchover) |
| Charging | ||
| AC charging | 1,500 W | 1,500 W |
| Full AC charge time | - | 1 h (VTOMAN: 1 h; Amazon listing: 58 min) |
| Max solar input | 1,000 W | 600 W |
| Solar input voltage | 12-150V, 13A | 12-60V (Anderson) |
| Car charging | - | 200 W |
| Build | ||
| Weight | 28.7 lb (13 kg) | 41.9 lb (19 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 |