Anker SOLIX F3800 Plus

Name: Anker SOLIX F3800 Plus
Brand: Anker
Price: 2499 USD
Availability: InStock

~$2,499approx. list price

Check price on Amazon

We may earn a commission. Price and availability on Amazon’s site may differ.

800 WLights, phones, router, a CPAP
2,200 WFridge, freezer and the essentials
4,000 WFurnace blower, sump pump or a window AC
7,500 WWell pump or a small central AC
18,000 WWhole home with central air

6,000 W running, 9,000 W surge — sustains the furnace blower, sump pump or a window AC tier and everything below it.

Best forDIYers who want generator-inlet whole-home backup and possible EV top-ups without an installed system.

The enthusiast favorite for DIY whole-home backup, and the unit DIY owners build around. 6000W split-phase with both a NEMA 14-50 and L14-30 on the face means it plugs straight into a generator inlet - no adapters - and can trickle-charge an EV. The Plus revision added 3,200W solar input and gas-generator charging input, fixing the original F3800's 60V solar ceiling. Anker's permanent price cut to $2,499 (from $4,799 launch) made it the per-kWh bargain of the big-battery class. Home Power Panel installs need an electrician and permit, and one owner who skipped the paperwork had the utility swap the meter for backfeeding.

From the spec sheet

Specifications

Battery capacity: 3,840 Wh
Expandable to: 53,760 Wh
Continuous output: 6,000 W
Surge output: 9,000 W
Runtime: Fridge (~150W): ~22 hrs on base unit

Type: Power Station
Fuel: Battery (LiFePO4)
Outlets: 6x AC incl. 240V NEMA 14-50 & L14-30, 3x USB-C, 2x USB-A, 12V car
Transfer-switch ready: Yes
Weight: 132 lbs
Warranty: 5-year
Model: F3800 Plus

240V NEMA 14-50 built in·Expandable to 53.8kWh·Permanent price cut to $2,499

At a glance

Strengths

+6000W/240V split-phase from one unit - plugs into standard generator inlets
+NEMA 14-50 enables emergency EV charging, a genuinely unique trick
+Expands to 26.9kWh per unit, 53.8kWh paired
+3,200W solar input recharges the base unit in under 2 sun-hours
+Gas generator input for indefinite off-grid runtime
+$2,499 permanent pricing is the best $/kWh among 240V portables

At a glance

Drawbacks

−Known ferrite-bead buzz under load; firmware patch reduced but didn't eliminate it
−Fans are loud during fast charging - garage placement recommended
−132 lbs; wheels are small and struggle off pavement
−Home Power Panel adds ~$1,500+ plus electrician for panel integration

Summarised from owner discussions and forums

Owner insights

Owners treat the F3800 Plus as home infrastructure rather than a camping battery. One ran a whole house through a manual transfer input for a five-day outage, another runs a pair behind the Home Power Panel shifting cheap overnight power into the day, one powers an RV with it, one plans to run a shed workshop from it, and one trickle-charges EVs from solar. Several owners have built well past the base 3.8kWh.

Solar is where it separates from its predecessor: two 165V inputs let owners run strings of residential or carport panels directly, and one owner pulled about 2,800W from seven carport panels. The trade-off is Anker's proprietary connector, which needs adapters for MC4 panels and is hard to replace in the field. With Anker's expansion packs pricey, some owners wire 12V or 48V LiFePO4 batteries into the solar ports. Home Power Panel installs bring permits and electricians into the picture, and an owner who skipped the paperwork had the utility change the meter, citing backfeeding. At 132 lb, it is moved rarely.

DIYers wanting 240V generator-inlet backup and solar without a permitted installed system are its core buyers. Shoppers have weighed it against the EcoFlow DELTA Pro Ultra, the Pecron E3600LFP and the Tesla Powerwall 3. One owner of an F3800 and Home Power Panel moved to an EG4 FlexBoss18 on the wiring already run, and another moved their F3800 Plus to an RV after outgrowing its solar input and put an Anker E10 on the house's existing generator inlet.

What owners like

+6,000W split-phase 240V from one unit - an owner rode out a five-day outage on a single F3800 Plus through a 30A manual transfer input, running the whole house including a 1HP well pump
+Two 11-165V solar inputs at up to 3,200W total, about 1,600W per port, so strings of full-size residential panels can feed it directly; after a storm took the grid down for over a week, an owner rewired seven carport panels into it and pulled about 2,800W
+The Plus fixed the original F3800's 60V, 2,400W solar ceiling, which one buyer called his biggest hangup with the first version
+Paired units scale into real home backup: two F3800 Plus behind the Home Power Panel or Anker's 50A power hub feeding a transfer switch, used both for outages and for shifting cheap overnight power into the day
+DIY-friendly: owners feed 48V server-rack and 12V LiFePO4 banks through the solar ports as cheap storage, with one hybrid two-unit build at 47.3kWh
+Charges from an EV with V2L: during that five-day outage the owner kept two units going by recharging the idle one from an Ioniq 5 at 1,700W
+NEMA 14-50 and L14-30 on the face; an owner trickle-charges a Nissan Leaf and a Tesla from it on daytime solar, adding about 10kWh a day, without pulling permits or hiring an electrician
+Easier for a household than gas: in a hurricane-season comparison, one view calls it more grab-and-use for normal people, with no fuel rotation, maintenance or CO risk to think about

Common complaints

−Proprietary high-voltage solar connector instead of XT60 or bare MC4: third-party panels need an adapter, a broken OEM cable cannot be replaced at a hardware store, and an owner building a battery cable had the plug 3D printed
−Anker's own expansion packs are expensive, which is why owners wire in DIY batteries instead; one RV owner on the F3800 Plus still has to run a generator daily through multi-day cloud
−Home Power Panel installs bring in electricians and permits: an owner's unpermitted dual-unit setup with roof solar got its meter swapped by the utility, which said it had been backfeeding, and they now advise against installing one without following the rules
−The 240V generator charging cable passes power through on a single unit only, not on two units joined by the dual power hub; an owner fed a chargeverter into the solar ports instead
−Air conditioning drains 3.8kWh fast and hurricanes bring cloudy days, so the advice to a hurricane-season shopper leaned toward a gas generator, alone or alongside the battery

Questions owners ask

Home Power Panel or a manual transfer switch?

A manual transfer switch is far cheaper and works: a single unit carried an owner's entire house for five days, well pump included, through a 30A manual transfer input with heavy loads like the oven switched off. The Home Power Panel takes over in about 20 milliseconds, which one household with medical equipment called the main selling point. By one estimate it adds thousands once labor and permits are counted, another owner's install came in under $2,000, and a manual interlock cost one owner about $300 of electrician time.

What solar panels should I use with the F3800 Plus?

Each of the two ports takes up to 165V and about 17A, roughly 1,600W, so owners run panels in series: one plans four panels of about 37V open-circuit per port to land near 150V, and another runs two 49V modules in series. Leave headroom for open-circuit voltage rising in cold weather. Anker uses its own high-voltage connector, so MC4 panels need an adapter cable.

Can I add cheaper batteries than Anker's expansion packs?

Some owners do, by charging a 12V or 48V LiFePO4 bank separately and feeding it into the solar input ports; one runs 12V 300Ah batteries in series into a port at a steady 434W. The expansion-port hack cable is no longer sold, so an owner is building their own with 8 AWG wire and a 3D-printed connector. It is entirely DIY, and one RV owner worries about the warranty.

F3800 Plus or a gas generator for hurricane season?

The advice to one shopper leaned toward having a generator. One person finds the F3800 Plus more grab-and-use than gas, but another notes air conditioning can empty batteries fast and a third says hurricanes bring days of cloud. One suggested setup pairs them: the battery covers the idle stretches and the generator runs only when it can work hard, which its proponent says roughly triples fuel endurance.

Can the F3800 Plus charge an electric car?

Yes. One owner charges a Nissan Leaf and a Tesla from it at 5-10A of Level 2 charging, but with only 3.8kWh stored they focus on the 3,200W solar input instead, sending whatever their workshop does not use into a car for about 10kWh a day. They can fully charge the 24kWh Leaf in one clear summer day.

Head to head