OUPES B2 review

Name: OUPES B2 Expansion Battery (2,048Wh)
Brand: OUPES

OUPES B2 Expansion Battery (2,048Wh)

By Tom Calder

Photo: Amazon

Our verdict · Researched

3.8 / 5

2,048Wh with its own solar input, for OUPES's Mega stations; two take a Mega 1 to 5,120Wh.

Best for: Expanding an OUPES Mega 1, 2 or 3
Skip it if: Your station isn't an OUPES Mega

Amazon price

$799.00

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.

In stock

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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

2,048Wh
Its own 2,100W solar input

Worth knowing

41.8 lb
OUPES stations only

ⓘ As an Amazon Associate, PreparedStates earns from qualifying purchases. We may earn a commission when you buy through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and can change at any time.

Who shouldn't buy this

Don't buy it if your station isn't an OUPES Mega.

Key specs

Capacity	2,048 Wh
Fits	OUPES Mega 1, 2, 3
Weight	41.8 lb
Cycles	3,500
Battery	LiFePO4

How this review works

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.

How we review →Full methodology →