OUPES Mega 1
#9 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 $446.49$446.49
The OUPES Mega 1 is the better portable power station overall, rated 4.3 to 3.1. The OUPES Mega 1 leads on value, battery life and features. The OUPES Mega 1 costs $453.50 less ($446.49 vs $899.99).
Generac GB1000
#39 in Mid-sizeFull review
For buyers who want a Generac-backed 1 kWh station that can run 1,600W appliances and parallel with a second unit; LiFePO4 rivals offer more cycles and faster charging for the money.
ecobee (Generac) $899.99$899.99
Prices were last checked October 27, 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 1 for value ($0.44 per rated Wh vs $0.83 per rated Wh), battery life (LiFePO4, 3,500 cycles, 5-year warranty vs Li-ion NMC, 800 cycles, 3-year warranty) and features (UPS (20 ms), expandable, 100 W USB-C, app vs no UPS, expansion or app).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every mid-size portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | OUPES Mega 1 | Generac GB1000 |
|---|---|---|
| Overall rating | 4.3/5 | 3.1/5 |
| Value 25% | 89 $0.44 per rated Wh | 36 $0.83 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 | 23 Li-ion NMC, 800 cycles, 3-year warranty |
| AC output 15% | 88 2,000 W continuous AC | 74 1,600 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)) | 68 83 Wh per kg (29 lb (13.2 kg)) |
| Solar input 5% | 74 800 W max solar input | 33 468 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 100 W USB-C, app | 0 no UPS, expansion or 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. |
Generac GB1000
No independent test published yet.
Specifications
| OUPES Mega 1 | Generac GB1000 | |
|---|---|---|
| Battery | ||
| Rated capacity | 1,024 Wh | 1,086 Wh |
| Tested usable capacity | 809 Wh (79%) | - |
| Chemistry | LiFePO4 | Li-ion NMC |
| Cycle life | 3,500 to 80% | 800 to 80% (0.5C charge, 1C discharge at 25 C) |
| Expandable | Yes, up to 5,120 Wh | No |
| Output | ||
| AC output | 2,000 W (4,500 W surge) | 1,600 W (3,200 W surge) |
| AC outlets | 4 total | 3 total |
| 120V 20A outlets (NEMA 5-20R) | 4 | - |
| 120V 2-prong outlets (NEMA 1-15R) | - | 3 |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 65 W each) |
| USB-A ports | 4 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 0 |
| UPS / pass-through | Yes (20 ms switchover) | No |
| Charging | ||
| AC charging | 1,400 W | 450 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 | 468 W |
| Solar input voltage | 12-78V (MPPT 18-75V, 14A) | 10-28V, 30A max (shared DC/solar input) |
| Car charging | 96 W | - |
| Build | ||
| Weight | 27.8 lb (12.6 kg) | 29 lb (13.2 kg) |
| Dimensions | 15.1 x 9.1 x 11.6 in | 14.1 x 10.2 x 12.0 in |
| App | OUPES app (Wi-Fi/Bluetooth) | - |
| Warranty | 5 years | 3 years |
| Released | 2025-07 | 2022-09 |