Expansion battery entity · 3.84 kWh LiFePO4 expansion · Current
Anker SOLIX BP3800 Expansion Battery
3,840 Wh LiFePO4 expansion battery for the Anker SOLIX F3800 (and F3800 Plus), 33 kg. Adds capacity to the host, with no outlets of its own and no direct charging. Up to six chain per host. 5-year warranty. Anker's own page conflicts on hosts, so the compatibility here is the rendered F3800 / F3800 Plus claim with the 'Only F3800' string preserved in notes.
Machine summary · expansion_battery · anker-solix-bp3800
- brand
- Anker SOLIX
- model_name
- BP3800
- release_status
- current
- chemistry
- lifepo4
- capacity_wh
- 3840
- compatible_host_models
- Anker SOLIX F3800, Anker SOLIX F3800 Plus
- has_own_outlets
- false
- weight_kg
- 33
- confidence_level
- high
- source_last_checked
- 2026-08-15
- json_export
- /expansion-batteries/anker-solix-bp3800.json
Overview
The Anker SOLIX BP3800 is a 3,840 Wh LiFePO4 expansion battery (75 Ah at 51.2 V nominal) in a 33 kg case, built to enlarge Anker's SOLIX F3800 power station. It has no outlets of its own and charges only through the host; up to six units chain per host. Anker's own materials conflict on which hosts it fits: the rendered FAQ and the page's JSON-LD say F3800 and F3800 Plus, another block on the same page says Only F3800, and the user guide names no host at all. This record follows the rendered claim, corroborated by the official F3800 Plus bundle SKU, and lists both the F3800 and F3800 Plus, while preserving the conflicting Only F3800 string in the record notes. The BP3800's own specifications come from its user guide, not from the F3800 station compare-table on the same page, which has no BP3800 column and describes the station. Warranty is 5 years. Cycle life is not published as a depth-of-discharge rating for this unit.
Variant note: BP3800 expansion battery (A1790111-85) for the SOLIX F3800 line. The A1790111 prefix without -85 is the F3800 station; do not conflate the station's compare-table specs with this unit.
Data note: SKU A1790111-85. COMPATIBILITY CONFLICT preserved (decision recorded): Anker's own product page conflicts on hosts. The rendered FAQ and the page's JSON-LD say 'F3800 and F3800 Plus'; another block on the same page says 'Only F3800'; and the user guide names no host at all. This record follows the rendered claim (F3800 and F3800 Plus), corroborated by the official F3800 Plus bundle SKU, and the conflicting 'Only F3800' string is preserved here rather than silently dropped. CAPACITY-BLUR TRAP avoided: the page's compare-table is an F3800 station table with no BP3800 column, so its 3,840 Wh, cycle and temperature rows describe the STATION; every BP3800 value stored here (75 Ah, 51.2 V, 33 kg, dimensions, temps) came from the BP3800's own user guide. FILENAME NOTE: the hero uses the station prefix A1790111 (the expansion battery is the -85 SKU), so the filename is not identity; the image itself was opened and confirmed to be the single BP3800 unit. cycleLifeCycles is null: no DoD-qualified cycle rating is published for the unit itself.
Specifications
Host compatibility leads this table because it is what makes an expansion battery meaningful, and it is recorded verbatim from the manufacturer and never inferred. The capacity shown is this unit's own rated energy, not a combined host-plus-expansion system total. Any cycle-life figure carries the depth of discharge it is quoted at, and figures the manufacturer does not publish are left blank rather than estimated. Exact claims and links are in the provenance table.
| Attribute | Value |
|---|---|
| Official compatibility statement | Compatible with the Anker SOLIX F3800 and F3800 Plus |
| Host models named by the manufacturer | Anker SOLIX F3800, Anker SOLIX F3800 Plus |
| Expansion units the host supports | Up to 6 |
| Attribute | Value |
|---|---|
| Rated energy | 3,840 Wh |
| Rated capacity | 75 Ah |
| Nominal voltage | 51.2 V |
| Chemistry | LiFePO4 (lithium iron phosphate) |
| Attribute | Value |
|---|---|
| Outlets on the expansion unit itself | None. It adds capacity to the host and has no output ports of its own |
| Direct charging inputs | None direct: the BP3800 has no outlets or charging inputs of its own and charges only through its host station. |
| Attribute | Value |
|---|---|
| Rated cycle life | No cycle-life figure published |
| Cycle-life test conditions | No depth-of-discharge cycle rating is published for the BP3800 itself. The cycle figure on Anker's page belongs to the F3800 station compare-table, not to this expansion battery, so it is not carried over. |
| Attribute | Value |
|---|---|
| Charge temperature range | 0 °C to 40 °C (32 °F to 104 °F) |
| Discharge temperature range | -20 °C to 40 °C (-4 °F to 104 °F) |
| Attribute | Value |
|---|---|
| Weight | 33 kg (72.8 lb) |
| Dimensions (L × W × H) | 393 × 355 × 262 mm |
| Attribute | Value |
|---|---|
| Warranty | 5 years |
| Release status | Current |
| Market region | US |
Use cases
- Enlarging an Anker SOLIX F3800 or F3800 Plus for multi-day home backup or off-grid use
- F3800 systems that stack several batteries for large stored energy behind one inverter
Strengths and weaknesses
Strengths
- Large 3,840 Wh LiFePO4 capacity in a single stackable unit
- Up to six units chain per host for very large banks
- 5-year warranty
- Chemistry, capacity, weight and dimensions published from the BP3800's own guide
Weaknesses
- No outlets and no direct charging: it works only through a host station
- Anker's own page conflicts on hosts (F3800 and F3800 Plus in one place, Only F3800 in another)
- 33 kg: a heavy single-unit lift
- No depth-of-discharge cycle rating is published for the unit itself
Where to buy
| Merchant | Price | Checked | Availability | Link |
|---|---|---|---|---|
| Anker SOLIXprimaryManufacturer direct | Not tracked | — | — | View at Anker SOLIX |
Sources and provenance
Core specifications come from official manufacturer sources only, with the exact claim text preserved per field. Spec sheets and manuals outrank marketing copy. See the methodology for the full policy.
| Field | Normalized value | Raw claim | Source | Confidence |
|---|---|---|---|---|
chemistry | lifepo4 | LiFePO4 | Official support page — From the BP3800's own user guide. | high |
capacityWh | 3840 | 3840Wh | Official support page — This unit's own energy (75 Ah x 51.2 V). Taken from the BP3800 guide, NOT the F3800 station compare-table on the product page. | high |
capacityAh | 75 | 75Ah | Official support page | high |
nominalVoltageV | 51.2 | 51.2V | Official support page — 75 Ah x 51.2 V = 3840 Wh, exactly matching the stated capacity. | high |
weightKg | 33 | — | Official support page — Published weight 33 kg from the BP3800 guide; sourced via research handoff (2026-08-15). | high |
dimensionsMm | [393,355,262] | — | Official support page — 393 x 355 x 262 mm from the BP3800 guide; sourced via research handoff (2026-08-15). | high |
officialCompatibilityStatement | Compatible with the Anker SOLIX F3800 and F3800 Plus | F3800 and F3800 Plus | Official product page — The rendered FAQ and the page's JSON-LD state F3800 and F3800 Plus. A separate block on the same page says 'Only F3800'; that conflicting string is preserved in the record notes. This record follows the rendered claim, corroborated by the F3800 Plus bundle SKU. | high |
compatibleHostModels | ["Anker SOLIX F3800","Anker SOLIX F3800 Plus"] | F3800 and F3800 Plus | Official product page — Up to six units chain per host. Conflict with the 'Only F3800' block preserved in notes. | high |
warrantyYears | 5 | — | Official product page — 5-year warranty; sourced via research handoff (2026-08-15). | high |
chargeTempRangeC | [0,40] | — | Official support page — Charge 0 to 40 C, discharge -20 to 40 C, from the BP3800 guide; sourced via research handoff (2026-08-15). | high |