OUPES Mega 2 Pro
#6 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 rates 4.1 among large portable power stations; the OUPES Mega 3 rates 4.0 among home backup ones. The OUPES Mega 2 Pro costs $500 less ($699 vs $1,199).
OUPES Mega 3
#5 in Home backupFull review
A big home-backup station with a 3600W inverter, RV outlet and massive solar input, for households that want to run large appliances through outages.
OUPES $1,199$1,199
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.
Scores side by side
These two sit in different size classes (large and home backup), 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 | OUPES Mega 2 Pro | OUPES Mega 3 |
|---|---|---|
| Overall rating | 4.1/5 | 4.0/5 |
| Value 25% | 94 $0.34 per rated Wh | 86 $0.39 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 73 86% of rated capacity delivered (1 test) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 96 LiFePO4, 3,500 cycles, 5-year warranty |
| AC output 15% | 58 2,500 W continuous AC | 37 3,600 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)) | 66 81 Wh per kg (83.3 lb (37.8 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 63 2,100 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 140 W USB-C, app | 100 UPS (20 ms), expandable, 100 W USB-C, app |
Independent capacity tests
OUPES Mega 2 Pro
No independent test published yet.
OUPES Mega 3
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 86% | 2,968W appliance load ran for 53.5 minutes. The article states 3,720Wh capacity in one place; the runtime math matches the rated 3,072Wh. |
Specifications
| OUPES Mega 2 Pro | OUPES Mega 3 | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 3,072 Wh |
| Tested usable capacity | - | 2,642 Wh (86%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 4000+ cycles to 80% | 3,500 to 80% |
| Expandable | Yes, up to 10,240 Wh | Yes, up to 15,360 Wh |
| Output | ||
| AC output | 2,500 W | 3,600 W (7,000 W surge) |
| Boost mode (resistive loads) | 3,600 W | - |
| AC outlets | 5 total | 6 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 5 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| USB-C ports | 2 (up to 140 W each) | 2 (up to 100 W each) |
| USB-A ports | 2 | 4 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 0 | 2 |
| UPS / pass-through | Yes (20 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Max solar input | 1,000 W | 2,100 W |
| Solar input voltage | 12-80V (MPPT 18-80V, 30A) | 12-148V (MPPT 18-140V, 15A) |
| Build | ||
| Weight | 48.8 lb (22.1 kg) | 83.3 lb (37.8 kg) |
| Dimensions | 18.8 x 11.6 x 11.6 in | 25.2 x 11.9 x 17.2 in |
| App | OUPES app (Wi-Fi/Bluetooth) | OUPES app (Wi-Fi/Bluetooth) |
| Warranty | 5 years | 5 years |