OUPES Mega 2 Pro
#7 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 is the better portable power station overall, rated 4.1 to 2.6. The OUPES Mega 2 Pro leads on value, battery life and AC output. The Generac GB2000 wins on portability. The OUPES Mega 2 Pro costs $1,100 less ($699 vs $1,799).
Generac GB2000
#32 in LargeFull review
For Generac owners who want a 2 kWh battery that can parallel with a second unit; most buyers get more capacity, faster charging and longer battery life for less from LiFePO4 rivals.
Toolnut $1,799$1,799
Prices were last checked October 29, 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 value ($0.34 per rated Wh vs $0.85 per rated Wh), battery life (LiFePO4, 4,000 cycles, 5-year warranty vs Li-ion NMC, 1,000 cycles, 3-year warranty) and AC output (2,500 W continuous AC vs 1,600 W continuous AC).
- Choose the Generac GB2000 for portability (108 Wh per kg (43 lb (19.5 kg)) vs 93 Wh per kg (48.8 lb (22.1 kg))).
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 | Generac GB2000 |
|---|---|---|
| Overall rating | 4.1/5 | 2.6/5 |
| Value 25% | 94 $0.34 per rated Wh | 15 $0.85 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 | 24 Li-ion NMC, 1,000 cycles, 3-year warranty |
| AC output 15% | 58 2,500 W continuous AC | 7 1,600 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)) | 100 108 Wh per kg (43 lb (19.5 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 8 468 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 140 W USB-C, app | 0 no UPS, expansion or app |
Specifications
| OUPES Mega 2 Pro | Generac GB2000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,106 Wh |
| Chemistry | LiFePO4 | Li-ion NMC |
| Cycle life | 4,000 4000+ cycles to 80% | 1,000 to 80% (0.5C charge, 1C discharge at 25 C) |
| Expandable | Yes, up to 10,240 Wh | No |
| Output | ||
| AC output | 2,500 W | 1,600 W (3,200 W surge) |
| Boost mode (resistive loads) | 3,600 W | - |
| AC outlets | 5 total | 3 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | - |
| 120V 2-prong outlets (NEMA 1-15R) | - | 3 |
| RV 30A outlet (TT-30R) | 1 | - |
| USB-C ports | 2 (up to 140 W each) | 2 (up to 65 W each) |
| USB-A ports | 2 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | 0 |
| UPS / pass-through | Yes (20 ms switchover) | No |
| Charging | ||
| AC charging | 1,800 W | 450 W |
| Max solar input | 1,000 W | 468 W |
| Solar input voltage | 12-80V (MPPT 18-80V, 30A) | 10-28V, 30A max (shared DC/solar input) |
| Car charging | 96 W | - |
| Build | ||
| Weight | 48.8 lb (22.1 kg) | 43 lb (19.5 kg) |
| Dimensions | 18.8 x 11.6 x 11.6 in | 16.8 x 10.4 x 15.1 in |
| App | OUPES app (Wi-Fi/Bluetooth) | - |
| Warranty | 5 years | 3 years |
| Released | 2026-06 | 2022-09 |