OUPES Mega 1 + B2 review
OUPES Mega 1 with B2 Extra Battery (3,072Wh)
By Tom Calder
OUPES's Mega 1 (1,024 Wh, 2,000 W, 4,500 W surge) with a 2,048 Wh B2 battery: 3,072 Wh split into a 27.8 lb station and a 41.8 lb battery, so no single piece is too heavy to lift.
- Best for
- 3 kWh in two pieces you can carry
- Skip it if
- You need more than 2,000 W at once
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- 3,072 Wh in two liftable pieces
- 4,500 W surge
- Basic 5-year warranty
Worth knowing
- 2,000 W output
- 120V only
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Who shouldn't buy this
Don't buy it if you need more than 2,000 W at once.
Key specs
| Capacity | 3,072 Wh |
| AC output | 2,000 W |
| Surge | 4,500 W |
| Weight | 69.6 lb |
| Battery | LiFePO4 |
| Cycles | — |
| Wall recharge | — |
| Solar in | — |
| AC volts | — |
| Expands | — |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Big output with solar and generator inputs for a long outage
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for A US household that wants a plug-in battery that can also feed essential circuits through a transfer switch
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Best for 3kWh of 120V backup on wheels