OUPES
OUPES Mega 2
Ranked #10 of 46 power stations we track.
A 2,048Wh LiFePO4 power station with a 2,500W inverter and a TT-30R RV outlet, expandable to 10.24kWh, aimed at home backup and RV users.
Amphourly is reader-supported. When you buy through links on this page we may earn an affiliate commission, at no extra cost to you. Rankings come from our published scoring method, not from who pays. How we make money
Strengths
- 2,500W continuous / 5,400W surge pure sine wave inverter
- Expands to 10.24kWh with up to four B2 batteries
- 2,100W max solar input; up to 3,700W combined AC + solar input
- TT-30R 30A outlet alongside four NEMA 5-20R sockets
Watch out for
- 48.5 lb before adding expansion batteries
- UPS switchover rated under 20 ms, slower than some 10 ms units
- Fast AC charging is 1,600W; full-charge time is only quoted for combined AC + solar
Score breakdown
How the OUPES Mega 2 scores: 8.3/10Methodology
- Battery chemistry16% weightLiFePO4
- Rated cycle life12% weight3,500
- AC output12% weight2,500 W
- Energy density12% weight42.23 Wh/lb
- AC recharge time12% weightNot published
- Solar recharge rate8% weight1.03 W per Wh
- Expandable8% weightYes
- UPS switchover8% weight20 ms
- Warranty8% weight5 yr
- App control4% weightwifi+bluetooth
Full specifications
| Brand | OUPES |
|---|---|
| Model | Mega 2 |
| Battery capacity (Wh) | 2,048 |
| Battery chemistry | LiFePO4 |
| Rated cycles to 80% | 3,500 |
| AC output, continuous (W) | 2,500 |
| AC output, surge (W) | 5,400 |
| AC outlets | 5 |
| Pure sine wave | Yes |
| USB-C ports | 2 |
| USB-C max per port (W) | 100 |
| USB-A ports | 4 |
| 12V car outlet | Yes |
| AC charging input, max (W) | 1,600 |
| Solar input, max (W) | 2,100 |
| Solar input, min voltage (V) | 12 |
| Solar input, max open-circuit voltage (V) | 148 |
| Solar input connector | Anderson |
| Expandable with extra batteries | Yes |
| Max expanded capacity (Wh) | 10,240 |
| UPS switchover (ms) | 20 |
| Weight (lb) | 48.5 |
| App connectivity | wifi+bluetooth |
| Warranty (years) | 5 |
Specs last checked 2026-10-23.
What will it run, and for how long?
| Appliance | Draw | Inverter | Runtime | Runtime as a share of 24 hours |
|---|---|---|---|---|
| ResMed AirSense 11 CPAP | 56 W | Runs | 31 h | |
| Wi-Fi router | 6.5 W | Runs | 11.2 days | |
| Smartphone charger | 10 W | Runs | 7.3 days | |
| Laptop computer | 50 W | Runs | 35 h | |
| LED bulb (60 W equivalent) | 9 W | Runs | 8.1 days | |
| Full-size refrigerator (ENERGY STAR) | 160 Wavg 51 W cycling | Runs | 34 h | |
| 12V portable fridge (Dometic CFX5 45) | 58 Wavg 7 W cycling | Runs | 10.4 days | |
| LED/LCD TV (about 45-inch) | 162 W | Runs | 11 h | |
| Window fan | 153 W | Runs | 11 h | |
| Drip coffee maker | 1,300 W | Runs | 1.3 h | |
| Microwave oven (1.25 cu ft) | 1,500 W | Runs | 1.2 h | |
| Submersible sump pump (1/2 HP) | 1,000 W3,000 W to start | Runs | 1.7 h |
Runtime = usable energy ÷ average draw. We count 85% of the rated 2,048 Wh as usable (1,741 Wh) to cover inverter and DC conversion losses. Fridges and freezers are averaged over their compressor cycle. An appliance runs only if its running watts fit the 2,500 W inverter and its start-up surge fits the 5,400 W surge rating. Wattages come from our appliance wattage table; try your own mix in the runtime calculator.
Which solar panels fit it?
- Solar input up to 2,100 W
- Voltage window 12–148 V
- Connector Anderson
Recharge time is from empty with one panel in full sun: 2,048 Wh ÷ the lower of75% of the panel's rating or the station's solar input limit. A panel rated above the input limit is safe as long as its Voc fits, because the station only draws what it can take. MC4 panels need a standard MC4 adapter cable, which many stations include. Wiring two panels in series doubles the Voc, so check the total against the voltage window. Try any pairing in the solar panel matcher.
7 panels that don't fit
- Jackery SolarSaga 200W Solar Panel: its 8mm DC plug doesn't fit the Anderson solar port
- EcoFlow 125W Bifacial Modular Solar Panel: its XT60 plug doesn't fit the Anderson solar port
- Goal Zero Nomad 400: its brand-specific plug doesn't fit the Anderson solar port
- Goal Zero Nomad 200: its brand-specific plug doesn't fit the Anderson solar port
- Goal Zero Nomad 100: its 8mm DC plug doesn't fit the Anderson solar port
- Goal Zero Boulder 100 Briefcase: its 8mm DC plug doesn't fit the Anderson solar port
- Goal Zero Boulder 200 Briefcase: its brand-specific plug doesn't fit the Anderson solar port
How it compares
| Spec | OUPES Mega 2 | OUPES Mega 1 | Growatt HELIOS 3600 |
|---|---|---|---|
| Score | 8.3 | 8.4 | 8.2 |
| Battery chemistry | LiFePO4 | LiFePO4 | LiFePO4 |
| Rated cycle life | 3,500 | 3,500 | — |
| AC output | 2,500 W | 2,000 W | 3,600 W |
| Energy density | 42.23 Wh/lb | 36.83 Wh/lb | 37.23 Wh/lb |
| AC recharge time | — | 58 min | 90 min |
| Solar recharge rate | 1.03 W per Wh | 0.78 W per Wh | 0.54 W per Wh |
| Expandable | Yes | Yes | Yes |
| UPS switchover | 20 ms | 20 ms | 20 ms |
| Warranty | 5 yr | 5 yr | 5 yr |
| App control | wifi+bluetooth | wifi+bluetooth | wifi+bluetooth |