Head to head
OUPES Mega 2 vs OUPES Mega 3
OUPES · Power Station
OUPES Mega 2
~$729
2,500 W / 5,400 W surge · up to fridge, freezer and the essentials
OUPES · Power Station
OUPES Mega 3
~$1,199
3,600 W / 7,000 W surge · up to fridge, freezer and the essentials
Quick takeThe OUPES Mega 2 lists about $470 lower; the OUPES Mega 3 puts out more sustained power (3,600 W).
| Spec | OUPES Mega 2 | OUPES Mega 3 |
|---|---|---|
| Approx. price | ~$729 | ~$1,199 |
| Type | Power Station | Power Station |
| Fuel | Battery (LiFePO4) | Battery (LiFePO4) |
| Running / output watts | 2,500 W | 3,600 W |
| Starting / surge watts | 5,400 W | 7,000 W |
| Battery capacity | 2,048 Wh | 3,072 Wh |
| Expandable to | 10,240 Wh | 15,360 Wh |
| Noise | — | — |
| Runtime | Fridge (~150W): ~11 hrs on base unit; ~55 hrs with four B2 packs | Fridge (~150W): ~16 hrs on base unit; ~80 hrs with six B2 packs |
| Outlets | 4x 120V 20A (5-20R), 1x TT-30R 120V 30A, 2x USB-C PD 100W, 4x USB-A 18W, 12V Anderson 30A, car 12V 10A, 2x DC5521 | 5x 120V 20A (5-20R), 1x TT-30R 120V 30A, 2x USB-C PD 100W, 4x USB-A QC 3.0, 12V Anderson 30A, car 12V 10A, 2x DC5521 |
| Fuel tank | — | — |
| Weight | 48.5 lbs | 83.3 lbs |
| Transfer-switch ready | No | No |
| Warranty | 5-year, 6 with free registration | 5-year, 6 with free registration |
Highlighted cell is the better figure for that row.
Owner pros and cons
OUPES Mega 2
- +TT-30R 30 A outlet takes an RV cord
- +5,400 W surge covers well pumps and refrigerators
- +Up to 3,700 W input with AC plus solar charges quickly
- +Seamless UPS under 20 ms
- −UPS changeover of under 20 ms is slower than EcoFlow's 10 ms
- −Noise level not published
- −48.5 lb is hefty for a camping unit
- −Small US service network and shorter outage track record than the big brands
- −TT-30R is 120 V; no L14-30 for a 240 V transfer switch
OUPES Mega 3
- +TT-30R 30 A outlet for an RV cord
- +7,000 W surge handles well-pump and compressor starts
- +Built-in wheel and handle make 83 lb manageable
- +Priced well below EcoFlow and Bluetti at similar capacity
- −UPS mode is capped at 2,200 W, below the 3,600 W normal output
- −83.3 lb needs a trolley or two people for stairs
- −Noise level is not published
- −Small US service network; less outage history than the big brands
- −TT-30R is 120 V; no 240 V transfer-switch outlet