OUPES Mega 2 Pro
#8 in LargeFull review
A 2kWh LiFePO4 station with an RV outlet and large expansion for home backup and RV owners on a budget.
OUPES $699$699
The OUPES Mega 2 Pro and the Dabbsson DBS2100 Pro are evenly matched, rated 4.1 and 4.1. The OUPES Mega 2 Pro leads on portability. The Dabbsson DBS2100 Pro wins on solar input. The OUPES Mega 2 Pro costs $100 less ($699 vs $799).
Dabbsson DBS2100 Pro
#11 in LargeFull review
For home-backup and RV buyers who want 2 kWh, high output and room to add batteries at a low price per watt-hour. Expect average efficiency at heavy loads.
Amazon $799 Dabbsson $799$799
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.
Which should you buy?
- Choose the OUPES Mega 2 Pro for portability (93 Wh per kg (48.8 lb (22.1 kg)) vs 88 Wh per kg (54 lb (24.5 kg))).
- Choose the Dabbsson DBS2100 Pro for solar input (1,200 W max solar input vs 1,000 W max solar input).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | OUPES Mega 2 Pro | Dabbsson DBS2100 Pro |
|---|---|---|
| Overall rating | 4.1/5 | 4.1/5 |
| Value 25% | 94 $0.34 per rated Wh | 89 $0.37 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 55 82% of rated capacity delivered (1 test) |
| 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% | 58 2,500 W continuous AC | 54 2,400 W continuous AC |
| Charging speed 10% | 50 full AC charge time not published (neutral score used) | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 87 93 Wh per kg (48.8 lb (22.1 kg)) | 78 88 Wh per kg (54 lb (24.5 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 48 1,200 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 140 W USB-C, app | 100 UPS (15 ms), expandable, 100 W USB-C, app |
Independent capacity tests
OUPES Mega 2 Pro
No independent test published yet.
Dabbsson DBS2100 Pro
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 82% | Continuous 2,150W load from full; an earlier run shut down at 30% from overheating. AC recharge measured at about 1 h 15 min to 80%, nearly 2 h to full. |
Specifications
| OUPES Mega 2 Pro | Dabbsson DBS2100 Pro | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,150 Wh |
| Tested usable capacity | - | 1,763 Wh (82%) |
| Chemistry | LiFePO4 | Semi-solid-state LiFePO4 |
| Cycle life | 4,000 4000+ cycles to 80% | 4,500 to 80% |
| Expandable | Yes, up to 10,240 Wh | Yes, up to 6,450 Wh |
| Output | ||
| AC output | 2,500 W | 2,400 W (4,800 W surge) |
| Boost mode (resistive loads) | 3,600 W | 3,600 W |
| AC outlets | 5 total | 4 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 3 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| AC waveform | - | Pure sine wave |
| USB-C ports | 2 (up to 140 W each) | 3 (up to 100 W each) |
| USB-A ports | 2 | 3 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | 2 |
| UPS / pass-through | Yes (20 ms switchover) | Yes (15 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Max solar input | 1,000 W | 1,200 W |
| Solar input voltage | 12-80V (MPPT 18-80V, 30A) | 12-60V, 25A max |
| Car charging | 96 W | 96 W |
| Build | ||
| Weight | 48.8 lb (22.1 kg) | 54 lb (24.5 kg) |
| Dimensions | 18.8 x 11.6 x 11.6 in | 17 x 10 x 11.9 in |
| App | OUPES app (Wi-Fi/Bluetooth) | Dabbsson app |
| Warranty | 5 years | 5 years |
| Released | 2026-06 | 2024-10 |