Wattstanding
Anker SOLIX BP3800 Expansion Battery (A1790111-85)

Product image: Anker SOLIX

Expansion battery · Anker SOLIX

Anker SOLIX BP3800 Expansion Battery (A1790111-85)

Anker SOLIX · 3,840 Wh add-on

The short answer

The Anker SOLIX BP3800 Expansion Battery (A1790111-85) adds 3,840 Wh of storage. The listing says it is for F3800 and F3800 Plus. Anker SOLIX lists it at $1,800, about $469 per kWh.

Capacity
3,840 Wh
For
F3800 and F3800 Plus
Price seen
$1,800

Good fit if

  • You already own the compatible base unit and need longer runtime
  • You prefer adding storage to adding a second station

Look elsewhere if

  • You do not own the compatible base unit
  • You need more output watts — an expansion battery adds energy, not power
$1,799.99Anker SOLIX listed price (base model) · seen 30 Sep 2026
View at Anker SOLIX

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

What it adds

An expansion battery adds watt-hours to a compatible power station without adding output: the base unit's inverter still limits how many watts you can run, but you can run them for longer.

Total capacity with this battery
Base unitBase capacityWith this batteryAC output (unchanged)
Anker SOLIX F3800 Portable Power Station - 3840Wh (A1790111)3,840 Wh7,680 Wh6,000 W
Anker SOLIX F3800 Plus Portable Power Station (A1790112)3,840 Wh7,680 Wh6,000 W
Wattstanding calculationWattstanding calculation — total capacity = base capacity + expansion capacity. Output watts stay at the base unit's rating.

Fit check before you buy

An expansion battery only works with the units its maker lists.

✓ Required? Check firsti Good to know
  • ✓Compatible base unitF3800 and F3800 Plus
  • ?Connection cableSome expansion batteries need a specific cable or adapter that may be sold separately.
  • iWeightWeight was not stated in the sources we read.

Specifications

Each figure is labelled with where it comes from. Numbered references link to the source list below.

Manufacturer storeRetailer listingWattstanding calculationNot verified

Published specifications

Battery capacity3,840 Wh[S1]Manufacturer store
Listed for use withF3800 and F3800 Plus[S1]Manufacturer store
Cycle life5 cycles[S1]Manufacturer store
WarrantyWHAT IS IN THE BOX: Anker SOLIX BP3800 Expansion Battery; Battery-to-H[S1]Manufacturer store

Wattstanding calculations

Price per kWh$469Wattstanding calculation

Limitations to weigh

  • Specifications are the maker's or seller's; Wattstanding has not tested this product.
  • Compatibility is the seller's statement; confirm it for your exact base unit and version.
  • Prices change; confirm the price and what is included.

Alternatives worth comparing

EcoFlow DELTA Pro 3 Smart Extra Battery4,096 Wh; $14 more
FOSSiBOT FB3840 Expansion Battery - 3840Wh LFP (For FOSSiBOT F3600 Pro) (EUFB3840)3,840 Wh; $301 less
Jackery Battery Pack 3600 Plus3,584 Wh; $451 less
BLUETTI B500K for AC300/AC200L5,120 Wh; same price

Where to buy

Our link opens this exact product page. Prices and stock change; check before you order.

$1,799.99Anker SOLIX listed price (base model) · seen 30 Sep 2026
View at Anker SOLIX

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

Questions buyers ask

Will the Anker SOLIX BP3800 Expansion Battery (A1790111-85) work with my power station?
The listing says it is for F3800 and F3800 Plus. Confirm your exact model and version with the seller.
Where can I buy the Anker SOLIX BP3800 Expansion Battery (A1790111-85)?
1 seller list it: Anker SOLIX.

Sources and verification

  1. Anker SOLIX — Anker SOLIX BP3800 Expansion Battery - 3840Wh LFP (For F3800 and F3800 Plus) — product page and specifications Retrieved 30 Sep 2026

Wattstanding has not tested this product hands-on. This reference is compiled from the sources above; our calculations are labelled and show their working. Electrical work belongs to a licensed electrician. Last verified 30 Sep 2026. How we work