The Growatt HELIOS 3600 and the Dabbsson DBS3500 are evenly matched, rated 3.9 and 3.9. The Growatt HELIOS 3600 leads on value. The Dabbsson DBS3500 wins on charging speed and solar input. The Growatt HELIOS 3600 costs $400.02 less ($1,198.98 vs $1,599).
A 3.7 kWh home backup station for buyers who want 240V from one unit and the option to grow toward whole-home backup. At the Amazon price it is one of the cheaper ways to get that much LiFePO4 capacity.
Amazon $1,198.98For homeowners building a whole-circuit backup system who want 3.4 kWh now, fast solar charging and a path to 240V. It is too heavy to treat as a camping unit.
Amazon $2,558.55 Dabbsson $1,599Prices 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.
Each factor is scored 0-100 against the same fixed reference points for every home backup portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | Growatt HELIOS 3600 | Dabbsson DBS3500 |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Value 25% | 96 $0.33 per rated Wh | 74 $0.47 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% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 100 Semi-solid-state LiFePO4, 4,500 cycles, 5-year warranty |
| AC output 15% | 37 3,600 W continuous AC | 37 3,600 W continuous AC |
| Charging speed 10% | 32 0-100% on AC in 3 h | 63 0-100% on AC in 2 h |
| Portability 10% | 67 82 Wh per kg (99 lb (45 kg)) | 70 84 Wh per kg (90.5 lb (41 kg)) |
| Solar input 5% | 46 2,000 W max solar input | 65 2,400 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 100 W USB-C, app | 100 UPS (15 ms), expandable, 100 W USB-C, app |
| Growatt HELIOS 3600 | Dabbsson DBS3500 | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,686 Wh | 3,430 Wh |
| Chemistry | LiFePO4 | Semi-solid-state LiFePO4 |
| Cycle life | 4,000 4000+ cycles; end-of-life capacity not stated | 4,500 to 80% |
| Expandable | Yes | Yes, up to 14,070 Wh |
| Output | ||
| AC output | 3,600 W | 3,600 W (7,200 W surge) |
| Boost mode (resistive loads) | 4,500 W | - |
| AC outlets | 6 total | 5 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| 240V 20A outlet (NEMA 6-20R) | 1 | - |
| AC waveform | - | Pure sine wave |
| USB-C ports | 4 (up to 100 W each) | 3 (up to 100 W each) |
| USB-A ports | 2 | 3 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 2 |
| UPS / pass-through | Yes (20 ms switchover) | Yes (15 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Full AC charge time | 3 h (About 3 h from 120V at 1800W, or 1.5 h from 240V at 3600W (manufacturer)) | 2 h (manufacturer comparison table: 0-80% in 1.78 h on AC; 0-100% in 1.91 h on 2400W solar) |
| Max solar input | 2,000 W | 2,400 W |
| Solar input voltage | 12-60V | 12-150V, 25A max (AC + solar combined up to 3400W) |
| Car charging | 96 W | 96 W |
| Build | ||
| Weight | 99 lb (45 kg) | 90.5 lb (41 kg) |
| Dimensions | 20.4 x 12.3 x 16.5 in | 20.9 x 12 x 15.4 in |
| App | myGro app (Wi-Fi and Bluetooth) | Dabbsson app |
| Warranty | 5 years | 5 years |
| Released | 2024-09 | 2024-04 |
