OUPES Mega 3 vs Bluetti Elite 300
Specs verified 2026-07-28 Methodology
Spec scoreboard: Mega 3 wins 7 of 12 · Elite 300 wins 2 of 12 (green = winner per row)
| Spec | OUPES Mega 3 | Bluetti Elite 300 |
|---|---|---|
| MSRP | $1,149 | $1,199 |
| Capacity | 3,072 Wh | 3,014 Wh |
| Max expandable | 15.4 kWh | 3.0 kWh |
| Continuous output | 3,600 W | 2,400 W |
| Surge | 7,000 W | 4,800 W |
| 240V output | No | No |
| Cycle life | 3,500 | 6,000 |
| AC recharge (0-100%) | 120 min | 120 min |
| Max solar input | 2,100 W | 1,200 W |
| Weight | 83.3 lb | 57.98 lb |
| Warranty | 5 years | 5 years |
| $ per kWh | $374 | $398 |
Runtime head-to-head
Computed from rated capacity at 85% inverter efficiency — the numbers marketing pages don't show side by side.
| Scenario | Mega 3 | Elite 300 |
|---|---|---|
| Refrigerator (150W, 35% duty) | 2.1 days | 2.0 days |
| CPAP overnight (60W) | 43.5 hrs | 42.7 hrs |
| Sump pump in storm (800W, 20% duty) | 16.3 hrs | 16.0 hrs |
| Home essentials (~330W bundle) | 15.8 hrs | 15.5 hrs |
Strengths & trade-offs
OUPES Mega 3
- 3,072Wh at $374/kWh — among the cheapest real storage we track
- TT-30R RV port and expansion to 15.36kWh put it in whole-home territory
- 2,100W solar input recharges it fast off a real array
- Independent testing tripped it above 3,600W despite a 7,000W peak claim
- OUPES advertises a 1-hour AC recharge; measured was just over two hours
- 83 lb with hard plastic wheels that scuff floors, and an advertised peak-shaving mode missing from the app
Bluetti Elite 300
- 3,014Wh — the most capacity per dollar in our Bluetti lineup ($398/kWh)
- 6,000-cycle LFP battery, 19% smaller footprint than rivals
- TT-30R RV port; 80% charge in 70 minutes
- 2,400W continuous is lower than the Elite 200 V2's 2,600W
- 4,800W 'lifting' is resistive-loads-only — not a motor-start figure
- ~58 lb; still a two-hand carry
Neither might be your size
Most buyers over- or under-size by 2x. Thirty seconds in the calculator ends the guessing.
Size my actual load →Frequently asked questions
Which is better, the OUPES Mega 3 or the Bluetti Elite 300?
On raw spec wins it's OUPES Mega 3 (7 to 2) across our 12 tracked specs - but the right pick depends on your load. Pick the OUPES for cheap expandable storage, the Bluetti for specs you can size against confidently.
How long will the Mega 3 and Elite 300 run a refrigerator?
At 150W and a 35% duty cycle: the OUPES Mega 3 runs about 2.1 days, the Bluetti Elite 300 about 2.0 days (85% inverter efficiency).
Is the price difference worth it?
The Mega 3 costs $374/kWh of storage vs $398/kWh for the Elite 300 at MSRP. Both discount frequently - check current prices before deciding, and size your actual load with our calculator first.