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 EcoFlow DELTA 2 Max are evenly matched, rated 4.1 and 4.1. The OUPES Mega 2 Pro leads on value and battery life. The OUPES Mega 2 Pro costs $350 less ($699 vs $1,049).
EcoFlow DELTA 2 Max
#9 in LargeFull review
A proven 2kWh LiFePO4 station for home backup and RV trips with plenty of outlets. It costs less than the DELTA 3 Max Plus but has slower switchover and less output.
Amazon $1,049$1,049
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 value ($0.34 per rated Wh vs $0.51 per rated Wh) and battery life (LiFePO4, 4,000 cycles, 5-year warranty vs LiFePO4, 3,000 cycles, 5-year warranty).
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 | EcoFlow DELTA 2 Max |
|---|---|---|
| Overall rating | 4.1/5 | 4.1/5 |
| Value 25% | 94 $0.34 per rated Wh | 67 $0.51 per rated Wh |
| Tested capacity 15% | 50 not yet independently tested (neutral score used) | 81 88% of rated capacity delivered (1 test) |
| Battery life 15% | 100 LiFePO4, 4,000 cycles, 5-year warranty | 91 LiFePO4, 3,000 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) | 84 0-100% on AC in 1 h 20 min |
| Portability 10% | 87 93 Wh per kg (48.8 lb (22.1 kg)) | 80 89 Wh per kg (50 lb (23 kg)) |
| Solar input 5% | 40 1,000 W max solar input | 40 1,000 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 140 W USB-C, app | 100 UPS (30 ms), expandable, 100 W USB-C, app |
Independent capacity tests
OUPES Mega 2 Pro
No independent test published yet.
EcoFlow DELTA 2 Max
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| StorageReview | 1,800 Wh | 88% | AC discharge at a 350W load. Recharge took 2,370 Wh from the wall. |
Specifications
| OUPES Mega 2 Pro | EcoFlow DELTA 2 Max | |
|---|---|---|
| Battery | ||
| Rated capacity | 2,048 Wh | 2,048 Wh |
| Tested usable capacity | - | 1,800 Wh (88%) |
| Chemistry | LiFePO4 | LiFePO4 |
| Cycle life | 4,000 4000+ cycles to 80% | 3,000 to 80% |
| Expandable | Yes, up to 10,240 Wh | Yes, up to 6,144 Wh |
| Output | ||
| AC output | 2,500 W | 2,400 W (4,800 W surge) |
| Boost mode (resistive loads) | 3,600 W | 3,400 W |
| AC outlets | 5 total | 6 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | 6 |
| RV 30A outlet (TT-30R) | 1 | - |
| AC waveform | - | Pure sine wave |
| 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 (30 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Full AC charge time | - | 1 h 20 min (0-80% in 1.1 h on AC alone; 43 min with AC and solar together) |
| Max solar input | 1,000 W | 1,000 W |
| Solar input voltage | 12-80V (MPPT 18-80V, 30A) | 11-60V, 15A (2 inputs, 500W each) |
| Car charging | 96 W | 96 W |
| Build | ||
| Weight | 48.8 lb (22.1 kg) | 50 lb (23 kg) |
| Dimensions | 18.8 x 11.6 x 11.6 in | 19.6 x 9.5 x 12 in |
| App | OUPES app (Wi-Fi/Bluetooth) | EcoFlow app (Wi-Fi and Bluetooth) |
| Warranty | 5 years | 5 years |
| Released | 2026-06 | 2023-05 |