On this pageSpecs Single-unit 240V home backup (subpanel tie-in)Heavy 240V worksite & big-rig (50A) RV 120V essentials backup + standby reserve (CPAP, fridge, router)Mobile power you move constantly (30A RV, campsite, jobsite)Solar-first / off-grid recharge

Anker SOLIX F3000vsF3800 (2026)

The Anker SOLIX F3000 and F3800 are sibling units — both wheeled, expandable LiFePO4 stations with ~3kWh base packs, 2,400W solar ratings, and 5-year warranties, at the same price point. The decision isn’t bigger is better. These two Reviews draw a sharp line: buy the F3800 only if you specifically need native single-unit 240V output or the larger battery pack. Otherwise, the F3000 is the better-balanced portable — lighter, quieter, lower idle draw, faster to recharge, $400 cheaper, and better real-world solar input. The entire comparison forks on whether your loads require 240V or exceed 3,600W from one box.

Anker SOLIX F3000

$1,399

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Prices and availability change frequently

Anker SOLIX F3800

$1,799

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Prices and availability change frequently

Spec	Anker SOLIX F3000	Anker SOLIX F3800
Price	$1,399	$1,799
Price per Wh	$0.455/Wh	$0.468/Wh
Capacity	3,072 Wh LiFePO4	3,840 Wh LiFePO4
Continuous output	3,600 W (TT-30R / hub; 2,400 W on standard outlets)	6,000 W
Voltage	120V native (240V via hub + second unit)	120V/240V split-phase native
Surge output	7,200 W rated; 4,860 W SurgePad; ~5,300 W measured	Not published^*
Weight	91.5 lbs	132.3 lbs
AC recharge time	~2 hr standard; ~1 hr 20 min on 30A input	~2.5 hr
Solar input	2,400 W (1,600 W High-PV 11–165V + 800 W Low-PV 11–60V)	2,400 W (dual 60V ports)
UPS switchover	20 ms	Capable; time not published
Expandable max	24,000 Wh	26,880 Wh single-unit
Warranty	5 years	5 years

^*Where a spec is blank, we did not record that figure in our research — not that the feature is absent.

Single-unit 240V home backup (subpanel tie-in)

Who it’s for: The homeowner backing up 240V appliances — well pump, electric dryer, range, or a transfer-switch subpanel — without stacking two units and a hub. Mixed 120V essentials plus intermittent 240V draw, roughly 300–1,500W on the 240V port.
Why it wins: The 6,000W continuous 120V/240V output from one box is the entire reason this unit exists. Our review confirms owners ran 240V electric dryers and backed up whole houses minus HVAC, tying directly into transfer-switch panels via the built-in NEMA 14-50 and L14-30 ports. It’s the first single-device 240V solution in its class. With the Home Power Panel, switchover was so clean owners didn’t notice the grid had dropped.
Usable capacity: ~3,400–3,460 Wh per charge at mid-to-high mixed loads (our review measured ~90% energy out at full cycle). At lighter ~300W essentials draw, the ~50–57W idle taxes more, but owners still got roughly a day of essentials from the base unit; one ran fridge, freezer, fans, hotspot, lights, and intermittent TV for ~26 hours on the F3800 plus one BP3800 expansion.
The catch — recharge architecture flaw: Charging through the 120V AC input disables the 240V output and three of the six 120V outlets. You cannot run a generator to recharge while powering 240V loads — in a multi-day outage, a freezer or well pump on 240V stops every time the unit cycles to recharge. The documented workaround is feeding DC into the solar port from a 48V battery or an EG4 chargeverter. If hands-off generator-recharge-while-running is a must, the separate F3800 Plus added 240V pass-through charging to fix this — at a higher price.
The other catch — central AC: It runs only with a soft-start mod, and even then owners saw light flicker on compressor start. Reliable central AC needs two units — most single-unit owners just keep HVAC off the backup panel.

Heavy 240V worksite & big-rig (50A) RV

Who it’s for: The contractor running 240V tools off-grid, or the owner of a 50-amp RV wanting shore-power-grade output from a battery. High continuous draw with hard-starting motor loads, up to the inverter ceiling, on the 240V / NEMA 14-50 / L14-30 ports.
Why it wins: Our review documents the 6,000W output running MIG welders, air compressors, and car lifts, and the built-in NEMA 14-50 and L14-30 ports make it a genuine RV shore-power substitute on 50A service. This is the use case the dual-voltage single-box design was built for. The F3000’s 120V architecture caps a single unit at 3,600W and physically cannot deliver the 6,000W or the 240V a 50A rig or a welder wants without a second unit.
Usable capacity: ~3,400–3,460 Wh per charge at heavy 240V loads (our review measured ~90% out at full cycle). At these loads idle is proportionally negligible.
The catch — surge data gap: The F3800’s surge rating is absent from our source data. Anker doesn’t publish a number we can cite. The ranking here rests on demonstrated behavior in our review (welders, compressors, lifts ran) rather than a surge spec — so for loads with brutal inrush (large compressors, central AC), treat startup headroom as evidenced-but-unquantified and plan a margin or a second unit.
The other catch — same recharge flaw: The charge-while-outputting limitation applies on 50A service: it won’t pass through and recharge at the same time when charging via AC input.

120V essentials backup + standby reserve (CPAP, fridge, router)

Who it’s for: The household or prepper who wants quiet, clean backup for fridge, lights, Wi-Fi, and a CPAP through an outage — and who keeps the unit charged and waiting, sometimes for weeks, between events. No 240V in the picture. Low and intermittent load, ~40–400W, mostly AC, with long idle stretches.
Why it wins: Measured idle sits around 20–35W — versus the F3800’s ~50–57W (and our F3000 review pegs the F3800 higher still, ~80W). Direction is unanimous: the F3800 burns roughly 2–3× as much just being on. Our review names this explicitly as what makes powering a fridge through an outage hold up in practice, and measured empty AC standby at ~88 hours. The F3800’s bigger pack, at ~55W idle, drains to roughly ~70 hours on standby despite holding 25% more energy — the idle erases its capacity lead for the waiting-reserve buyer. Add that the F3000 is quieter (~35dB at moderate load, ~53dB at full output vs the F3800’s 50–60dB), $400 cheaper, charges faster (full charge in ~1 hr 20 min on the 30A cable), and carries a 20ms UPS switchover where the F3800’s switchover time is unpublished.
Usable capacity: At a CPAP-class ~40W or a light ~200W essentials draw, the F3000 delivers ~2,490 Wh (our review measured ~81% of rated capacity at 200W, where fixed idle taxes a low load), rising toward ~2,650–2,760 Wh as the load climbs. Owners running fridge plus lights plus Wi-Fi consistently report about a full day per charge.
Honest counterpoint: The F3800’s 3,840Wh pack is 25% larger, so for a heavier essentials load (multiple fridges, a sump pump, continuous draw well above idle) recharged between events, its bigger battery and 6kW headroom pull ahead — the idle penalty only dominates at genuinely low loads and long standby. If your essentials are heavy or you want maximum single-charge runtime without an expansion battery, the F3800 is the better pick and you’re really a home-backup or heavy-load buyer.

Mobile power you move constantly (30A RV, campsite, jobsite)

Who it’s for: The 30A RVer, the camper, the tradesperson hauling the unit between house, rig, and site. The thing gets lifted, loaded, and rolled across uneven ground regularly. Varied 120V loads, but the deciding variable isn’t load — it’s transport.
Why it wins: At 91.5 lbs the F3000 is ~40 lbs lighter than the 132.3-lb F3800 — and our review calls it the most maneuverable large unit in its class, with a horizontal layout that stores and rolls better than a tower and is more RV-storable. The F3800’s own review is blunt about the other side: one person on level ground only, while stairs, vehicle loading, and uneven terrain are a genuine two-person job at 130+ lbs — one owner’s unit even rolled off a walkway and cracked its front casing. The F3000’s TT-30R output also plugs straight into a 30A RV inlet, its 30A Anderson DC port integrates with camper systems, and it handled an RV air-conditioner startup surge in testing. Lower idle and quieter operation are bonus wins for camp life.
Usable capacity: ~2,650–2,760 Wh at typical mixed camp or RV loads (90% of rated at moderate-to-higher draw; the 12V fridge or cooler on the DC Anderson port bypasses inverter idle entirely, so DC loads see near-full capacity).
The catch: The F3800 reclaims the win only for the 50A or 240V rig — that’s a different buyer. A 120V-only jobsite under 3,600W favors the F3000’s lighter, lower-idle, cord-reachable package.

Solar-first / off-grid recharge

Who it’s for: The off-grid or outage-prone buyer whose primary refill plan is the sun, not the wall. Load profile is secondary; what matters is how much real solar the unit ingests and whether it can recharge while it works.
Why it wins — solar input architecture: The F3000 has a true high-voltage MPPT — its High-PV input accepts 11–165V (1,600W) alongside an 11–60V Low-PV input (800W), and real-world panel setups measured ~1,900W combined into a single unit. The F3800 is dual-60V only, and our review is emphatic that its 60V/25A per-port ceiling caps real-world input around 1,200W with non-Anker panels — an Anker 400W panel managed just 280W in clear Texas sun, and two 405W rigid panels in parallel made ~325W against an 810W spec. Reaching the F3800’s rated input effectively requires Anker’s own expensive panels. The F3000 simply ingests more real solar.
Why it wins — charge-while-outputting: The F3800 disables its 240V output (and three of six 120V outlets) whenever it charges via AC — and for an off-grid buyer leaning on generator-plus-solar top-ups, that means the unit can’t keep heavy circuits live while it recharges. The F3000 has no such limitation and offers true 3,600W pass-through: it recharges and powers devices simultaneously at full speed, combined AC-plus-solar peaking ~3,800W on a single unit.
Usable capacity: ~2,650 Wh per cycle at typical off-grid loads, refilled from real solar at ~1,900W in good sun (~1.5–2 hr to full with a strong array; longer in real conditions — plan around it).
The catch — cold weather: Both units share the same cold-weather caveat worth stating for off-grid life. Our F3800 review is specific — its BMS drops AC charging to ~685W below 50°F and won’t charge at all below 32°F with no internal heater; the F3000’s published charging range is 32–104°F. Neither is a set-and-forget winter off-grid unit without planning.
The other catch — platform limits: Anker’s app is underpowered (no SOC floor/ceiling, limited scheduling), and firmware updates need Wi-Fi.
Panel pairing — disclosed gap: Our catalog currently contains no Anker solar panel record — searches for the SOLIX 440W Rigid, the PS400, and Anker panels generally returned nothing. So we can’t deliver a bench-validated kit here. Anker’s own product configs list the SOLIX 440W Rigid (the F3000 pairs 2–4 of these in catalog bundles) and the PS400 as manufacturer panel options, and the F3000’s 11–165V High-PV window is what makes higher-voltage rigid strings viable — but treat those as manufacturer references, not a validated pairing, until a panel record with measured output and a voltage-window check exists in our research.

The bottom line

Strip away the segments and it’s a single fork, and both our reviews agree on it: Do you need native 240V — or 6,000W — out of a single box? If yes (well pump, dryer, range, subpanel, 50A rig, heavy 240V tools), the F3800 wins. Pay the $400 premium, the 40 extra pounds, the higher idle, and plan around the charge-while-outputting flaw. You’re buying the single-box 240V capability nothing else here offers. If no (120V essentials, RV/camp, mobile, solar-first, standby reserve), the F3000 wins. It’s lighter, quieter, lower-idle, faster-charging, $400 cheaper, marginally better on price per Wh, and ingests more real solar. Its smaller pack still does a full day of essentials. The F3800 wins two segments on native 240V output — a hard physical gate. The F3000 wins three segments on portability, idle draw, and solar input — the moment 240V drops out of the requirement. The single flipping axis across the whole page is native 240V need; everything else favors the F3000.

Read the full Anker SOLIX F3000 review Read the full Anker SOLIX F3800 review