OUPES Mega 3
#5 in Home backupFull review
A big home-backup station with a 3600W inverter, RV outlet and massive solar input, for households that want to run large appliances through outages.
OUPES $1,199$1,199
The OUPES Mega 3 is the better portable power station overall, rated 4.0 to 3.9. The OUPES Mega 3 leads on AC output, solar input and features. The Dabbsson 3000L wins on portability and value. The Dabbsson 3000L costs $200 less ($999 vs $1,199).
Dabbsson 3000L
#9 in Home backupFull review
For RV owners and home-backup buyers who want 3 kWh and 3000W at a low price in a fixed-size unit. Buyers who may want to add batteries or 240V later should look at expandable models.
Amazon $1,069 Dabbsson $999$999
Prices were last checked October 20, 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 3 for AC output (3,600 W continuous AC vs 3,000 W continuous AC), solar input (2,100 W max solar input vs 1,200 W max solar input) and features (UPS (20 ms), expandable, 100 W USB-C, app vs UPS (15 ms), 100 W USB-C, app).
- Choose the Dabbsson 3000L for portability (119 Wh per kg (56.8 lb (25.8 kg)) vs 81 Wh per kg (83.3 lb (37.8 kg))) and value ($0.33 per rated Wh vs $0.39 per rated Wh).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every home backup portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | OUPES Mega 3 | Dabbsson 3000L |
|---|---|---|
| Overall rating | 4.0/5 | 3.9/5 |
| Value 25% | 86 $0.39 per rated Wh | 96 $0.33 per rated Wh |
| Tested capacity 15% | 73 86% 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 Semi-solid-state LiFePO4, 4,000 cycles, 5-year warranty |
| AC output 15% | 37 3,600 W continuous AC | 20 3,000 W continuous AC |
| Charging speed 10% | 50 full AC charge time not published (neutral score used) | 50 full AC charge time not published (neutral score used) |
| Portability 10% | 66 81 Wh per kg (83.3 lb (37.8 kg)) | 100 119 Wh per kg (56.8 lb (25.8 kg)) |
| Solar input 5% | 63 2,100 W max solar input | 28 1,200 W max solar input |
| Features 5% | 100 UPS (20 ms), expandable, 100 W USB-C, app | 75 UPS (15 ms), 100 W USB-C, app |
Independent capacity tests
OUPES Mega 3
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| The Solar Lab | - | 86% | 2,968W appliance load ran for 53.5 minutes. The article states 3,720Wh capacity in one place; the runtime math matches the rated 3,072Wh. |
Dabbsson 3000L
No independent test published yet.
Specifications
| OUPES Mega 3 | Dabbsson 3000L | |
|---|---|---|
| Battery | ||
| Rated capacity | 3,072 Wh | 3,072 Wh |
| Tested usable capacity | 2,642 Wh (86%) | - |
| Chemistry | LiFePO4 | Semi-solid-state LiFePO4 |
| Cycle life | 3,500 to 80% | 4,000 to 80% |
| Expandable | Yes, up to 15,360 Wh | No |
| Output | ||
| AC output | 3,600 W (7,000 W surge) | 3,000 W (6,000 W surge) |
| Boost mode (resistive loads) | - | 3,600 W |
| AC outlets | 6 total | 7 total |
| 120V 20A outlets (NEMA 5-20R) | 5 | 3 |
| 120V 2-prong outlets (NEMA 1-15R) | - | 3 |
| RV 30A outlet (TT-30R) | 1 | 1 |
| AC waveform | - | Pure sine wave |
| USB-C ports | 2 (up to 100 W each) | 2 (up to 100 W each) |
| USB-A ports | 4 | 2 |
| 12 V car outlet | Yes | Yes |
| DC5521 ports | 2 | 1 |
| UPS / pass-through | Yes (20 ms switchover) | Yes (15 ms switchover) |
| Charging | ||
| AC charging | 1,800 W | 1,800 W |
| Max solar input | 2,100 W | 1,200 W |
| Solar input voltage | 12-148V (MPPT 18-140V, 15A) | 12-60V, 25A max (AC + solar combined up to 1800W) |
| Build | ||
| Weight | 83.3 lb (37.8 kg) | 56.8 lb (25.8 kg) |
| Dimensions | 25.2 x 11.9 x 17.2 in | 19.1 x 11.5 x 9.5 in |
| App | OUPES app (Wi-Fi/Bluetooth) | Dabbsson app |
| Warranty | 5 years | 5 years |