The Dabbsson DBS1400 Pro rates 4.3 among mid-size portable power stations; the VTOMAN FlashSpeed 1500 rates 3.6 among large ones. The VTOMAN FlashSpeed 1500 costs $90 less ($589 vs $679).
For RV owners and home-backup buyers who want high output and fast recharging from a mid-size unit that can grow with extra batteries. It is heavy for 1.4 kWh, so it suits staying put more than carrying around.
Amazon Dabbsson $679A 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 $589Prices 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.
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 | Dabbsson DBS1400 Pro | VTOMAN FlashSpeed 1500 |
|---|---|---|
| Overall rating | 4.3/5 | 3.6/5 |
| Value 25% | 81 $0.49 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% | 100 Semi-solid-state LiFePO4, 4,500 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% | 79 0-100% on AC in 1 h 30 min | 95 0-100% on AC in 1 h |
| Portability 10% | 41 67 Wh per kg (45 lb (20.5 kg)) | 68 82 Wh per kg (41.4 lb (18.8 kg)) |
| Solar input 5% | 85 1,200 W max solar input | 13 400 W max solar input |
| Features 5% | 100 UPS (15 ms), expandable, 100 W USB-C, app | 80 UPS (20 ms), expandable, 100 W USB-C |
No independent test published yet.
| 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. |
| Dabbsson DBS1400 Pro | VTOMAN FlashSpeed 1500 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,382 Wh | 1,548 Wh |
| Tested usable capacity | - | 1,210 Wh (78%) |
| Chemistry | Semi-solid-state LiFePO4 | LiFePO4 |
| Cycle life | 4,500 to 80% | 3,000 to 80% |
| Expandable | Yes, up to 5,682 Wh | Yes, up to 3,096 Wh |
| Output | ||
| AC output | 2,400 W (4,800 W surge) | 1,500 W (3,000 W surge) |
| Boost mode (resistive loads) | 3,600 W | - |
| AC outlets | 4 total | 3 total |
| 120V 15A outlets (NEMA 5-15R) | - | 3 |
| 120V 20A outlets (NEMA 5-20R) | 3 | - |
| RV 30A outlet (TT-30R) | 1 | - |
| AC waveform | Pure sine wave | - |
| USB-C ports | 3 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 3 | 4 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 2 |
| UPS / pass-through | Yes (15 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,500 W |
| Full AC charge time | 1 h 30 min (manufacturer: 0-80% in 32 min with AC + solar combined (2400W); AC-only time not published) | 1 h |
| Max solar input | 1,200 W | 400 W |
| Solar input voltage | 12-60V, 25A max (AC 1800W + solar 600W, 2400W max combined) | 30-60V (Anderson) |
| Car charging | 96 W | 200 W |
| Build | ||
| Weight | 45 lb (20.5 kg) | 41.4 lb (18.8 kg) |
| Dimensions | 17 x 10 x 11.9 in | 15.5 x 11 x 10.6 in |
| App | Dabbsson app | - |
| Warranty | 5 years | 2 years |
| Released | 2024-10 | 2023-08 |
