Goal Zero Tank PRO 4000

Name: Tank Pro 4000
Brand: Goal Zero
Price: 1999.95 USD
Availability: InStock

3,994 Wh of LiFePO4, 80.3 lb, for the Yeti PRO 4000. $1,999.95 at Goal Zero, checked Oct 14, 2026: $0.50 for each watt-hour it adds. With the 4 Goal Zero allows, the Yeti PRO 4000 holds 19,970 Wh in all.

Adds

3,994Wh

Price

$1,999.95

Per Wh added

$0.50

Each watt-hour it adds costs less than the Yeti PRO 4000's own ($1.00 on the Yeti PRO 4000), so it is the cheaper way to more stored energy than a second station, which adds outlets and output instead.

From Goal Zero's published figures and our own arithmetic; we have not tested it ourselves.

See it at Goal Zero Extra batteries for every station

Which stations take it

The most one station takes is Goal Zero's figure; a dash where its page gives none. Prices are both makers' prices added up, before cables.

Goal Zero Tank PRO 4000 on each station
Station	Most per station	With one	With the most	Station and one battery
Goal Zero Yeti PRO 40003,994 Wh on its own	4	7,988 Wh	19,970 Wh	$5,999.9

Specs

Goal Zero Tank PRO 4000: Goal Zero's figures
Capacity	3,994 Wh
Cells	LiFePO4
Weight	80.3 lb (36.4 kg)
Cable, in the maker's words	"Tank to Yeti Pro Chaining Cable"

Where these figures come from

Goal Zero product page: "Battery Pack Capacity: 3994 Wh (51.2 V, 78 Ah)" · "Weight: 80.3 lbs. (36.4 kg)" · "Cell Chemistry: LiFePO₄"
On the Yeti PRO 4000: Goal Zero's page, "Get even more power by adding up to 4 Tank PRO 4000 expansion batteries for up to 20 kWh of power."
Price and stock: Goal Zero's US store, checked Oct 14, 2026.