At a glance

Full specs ↓

Capacity: 256 Wh
Usable energy: 230 Wh
AC output: 200 W
Surge: 400 W
Chemistry: LiFePO4
Cycle life: 3000 cycles
Max solar: 100 W
Weight: 8.2 lb

Best for

Phones & laptops CPAP Weekend camping

Estimated usable capacity Estimate

196 Wh at the outlet · ~77% of the 256 Wh rating

An estimate, not a measurement: we derate the 256 Wh rating for a safe depth-of-discharge and ~15% inverter loss (DC→AC). We haven't bench-tested this unit yet, so treat it as a solid approximation.

Anker

Anker 521 PowerHouse

Name: Anker 521 PowerHouse
Brand: Anker
Availability: InStock

★ 4.5 / 5

The Anker 521 PowerHouse is a 256Wh LiFePO4 portable power station delivering 200W continuous (400W surge). Rated for ~3000 cycles and up to 100W of solar input.

from $186 $0.813/Wh

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Where to buy 2 retailers

Amazon Lowest

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$186

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Anker

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$199

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Prices refresh daily and may change — confirm on the retailer's site.

Full specifications

Battery capacity	256 Wh
Usable capacity	230 Wh
AC output	200 W
Surge output	400 W
Chemistry	LiFePO4
Cycle life	3000 cycles
Max solar input	100 W
Expandable	No
Weight	8.2 lb
Warranty	5 yrs
Ports	2x AC \| 1x USB-C \| 2x USB-A \| 1x car