OUPES Mega 1
#13 in Mid-sizeFull review
A strong 1kWh home-backup station with a big inverter and room to expand, often sold well below list price on Amazon.
Amazon $549$549
The OUPES Mega 1 rates 4.2 among mid-size portable power stations; the OUPES Mega 2 Pro rates 4.1 among large ones. The OUPES Mega 1 costs $150 less ($549 vs $699).
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
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.
Scores side by side
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 | OUPES Mega 1 | OUPES Mega 2 Pro |
|---|---|---|
| Overall rating | 4.2/5 | 4.1/5 |
| Value 25% | 75 $0.54 per rated Wh | 94 $0.34 per rated Wh |
| Tested capacity 15% | 41 79% of rated capacity delivered (1 test) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 96 LiFePO4, 3,500 cycles, 5-year warranty | 100 LiFePO4, 4,000 cycles, 5-year warranty |
| AC output 15% | 88 2,000 W continuous AC | 58 2,500 W continuous AC |
| Charging speed 10% | 96 0-100% on AC in 58 min | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 66 81 Wh per kg (27.8 lb (12.6 kg)) | 87 93 Wh per kg (48.8 lb (22.1 kg)) |
| Solar input 5% | 74 800 W max solar input | 40 1,000 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 100 W USB-C, app | 100 UPS (20 ms), expandable, 140 W USB-C, app |
Independent capacity tests
OUPES Mega 1
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 79% | 1,779W appliance load ran for 27 minutes. |
OUPES Mega 2 Pro
No independent test published yet.
Specifications
| OUPES Mega 1 | OUPES Mega 2 Pro | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,024 Wh | 2,048 Wh |
| Tested usable capacity | 809 Wh (79%) | - |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 3,500 to 80% | 4,000 4000+ cycles to 80% |
| Expandable | Yes, up to 5,120 Wh | Yes, up to 10,240 Wh |
| Output | ||
| AC output | 2,000 W (4,500 W surge) | 2,500 W |
| Boost mode (resistive loads) | - | 3,600 W |
| AC outlets | 4 total | 5 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 4 |
| RV 30A outlet (TT-30R) | - | 1 |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 140 W each) |
| USB-A ports | 4 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | Yes (20 ms switchover) | Yes (20 ms switchover) |
| Charging | ||
| AC charging | 1,400 W | 1,800 W |
| Full AC charge time | 58 min (OUPES: full in 36 min with AC plus solar (2200W). The Amazon listing says 36 min to 80%. AC-only time not published) | - |
| Max solar input | 800 W | 1,000 W |
| Solar input voltage | 12-78V (MPPT 18-75V, 14A) | 12-80V (MPPT 18-80V, 30A) |
| Car charging | 96 W | 96 W |
| Build | ||
| Weight | 27.8 lb (12.6 kg) | 48.8 lb (22.1 kg) |
| Dimensions | 15.1 x 9.1 x 11.6 in | 18.8 x 11.6 x 11.6 in |
| App | OUPES app (Wi-Fi/Bluetooth) | OUPES app (Wi-Fi/Bluetooth) |
| Warranty | 5 years | 5 years |
| Released | 2025-07 | 2026-06 |