Specifications checked against manufacturer pages on 2026-09-12.
Anker SOLIX F3800: 3,840 Wh of LiFePO4 cells behind a 6,000 W continuous inverter, in the large size. Checked against the maker’s page on 2026-09-12: every published figure, the runtimes those figures imply, and the specifications Anker SOLIX does not publish at all. Nothing here is a bench result, and each calculated number says so on its own row.
In short. 3,840 Wh in the large band: $0.57/Wh at the list price we recorded; 29.0 Wh per pound. On our assumptions a full-size refrigerator calculates to 2.1–2.5 days, and a 40 W CPAP calculates to 2.8–3.3 days. Anker SOLIX leaves 2 of the rows we track unstated, and we name them rather than filling in a guess. The runtime figures are calculated, not measured.
Check the current price
That link points at the base unit we transcribed, not a kit with panels. Amazon prices change daily.
Who it is for, and who should skip it
The published figures answer this before any opinion does.
It fits if
- A refrigerator is what you are saving. It clears a 12-hour outage on our assumptions with about 39 hours to spare, and the stated 9,000 W surge covers a roughly 900 W start.
- One night of uninterrupted medical equipment. A 40 W machine without a humidifier runs the night with margin, and the maker states up to 20 ms on the grid handover. A heated humidifier changes that arithmetic.
- Your outages run past a day. Up to 2,400 W of solar input is what decides whether day two starts full or empty.
Skip it if
- It has to travel. At 132.3 lb this needs two people or a cart; it lives where you put it.
- You own a large array already. It takes at most 2,400 W of solar; panels past that ceiling idle rather than charge it faster.
- Your plan involves house wiring. Nothing portable connects to a panel safely without a transfer switch installed by a licensed electrician. Settle that before buying.
Every published specification
Numbered notes give the source location or a caveat where a figure needs one. “Manufacturer does not state” marks an absence on the maker’s page; “Not yet verified by CalmWatt” marks one of ours.
| Specification | Anker SOLIX F3800 |
|---|---|
| Rated capacity | 3,840 Wh1 |
| Usable capacity (calculated)* | 3264–3456 Wh |
| Continuous AC output | 6,000 W2 |
| Surge output | 9,000 W3 |
| Full recharge from wall | Manufacturer does not state |
| Cell chemistry | LiFePO44 |
| Rated cycle life | 3,000+ cycles (retention not stated)5 |
| UPS switchover | ≤20 ms6 |
| Expandable | Yes, up to 26,880 Wh7,8 |
| Max solar input | 2,400 W9 |
| Max AC charging input | 1,800 W10 |
| AC outlets | 811 |
| Highest USB-C port | 100 W12 |
| App control | Yes13 |
| Stated noise | Manufacturer does not state |
| Warranty | 5 years14 |
| Weight | 132.3 lb15 |
| Manufacturer list price when checked | $2,199.9916 |
* Rated capacity × an assumed 85–90% conversion efficiency. Ours, because nobody publishes one.
Notes on the figures
- F3800, rated capacity: Tech Specs table, first row.
- F3800, continuous output: Tech Specs table. Unlike the Jackery HomePower 3600 Pro Max, this spec is not split into separate 120V/240V wattage figures — a single 6,000W continuous rating covers both voltages per the marketing bullet “Dual-Voltage Output: 120V/240V, 6kW AC output per unit” (with the caveat that “the 240V output cannot be used while the device is charging via 120V AC”).
- F3800, surge: Tech Specs table, immediately below AC Continuous Output.
- F3800, cell chemistry: The page abbreviates the chemistry as “LFP”.
- F3800, cycle life: The “+” makes this a floor rather than an exact figure: Anker says “3,000+ cycles”. Anker does not say what share of the original capacity the cell still holds at that point, and no such figure appears anywhere on the page. A cycle count without that level is not comparable with one that has it.
- F3800, UPS switchover: An upper bound. Anker writes it as “less than 20 ms”.
- F3800, expandable: Tech Specs table. A marketing bullet on the same page puts it as a range — “Expandable Capacity: Starts at 3.84kWh (6kW), expandable to 53.8kWh (12kW)” — but that upper figure counts two power stations together. One station with its six expansion batteries reaches 26,880 Wh; the row below carries that figure.
- F3800, expandable: 26,880 Wh is the single-unit expansion ceiling: one power station with its expansion batteries. Anker states it as an exact number in the official F3800 user guide (page 6, “Connect With an Expansion Battery”), linked from the Downloads section of the product page. The product page shows the same ceiling in its “Enormous Capacity” graphic, which steps from 3.84 kWh for the unit alone to 26.9 kWh with six expansion batteries. A larger 53.8 kWh figure appears elsewhere on that page; that one is two power stations combined, a different configuration rather than this unit’s own ceiling.
- F3800, solar input: Tech Specs table (two MPPT channels, 1,200W/25A each, 2,400W combined). Corroborated by the marketing bullet “Solar Input: Up to 2,400W (dual 60V) solar charging, fully recharging in under 2 hours in optimal sunlight.”
- F3800, AC input: Tech Specs table, directly below Solar Input Recharge. Anker gives the maximum wattage the unit will draw from the wall, but never says how long a full recharge takes.
- F3800, AC outlets: 6 x 120V NEMA 5-20 (20A) + 1 x 240V NEMA 14-50 + 1 x 240V NEMA L14-30, eight AC outlets in all.
- F3800, USB-C: Per-port max (3 ports × 100W = 300W combined total, both stated on the same line).
- F3800, app: Tech Specs table. Corroborated by marketing bullet “Remote Control: Track and manage charging, usage, and battery status in real time with Anker app.”
- F3800, warranty: Tech Specs table. Corroborated by the marketing bullet “Built to Last: EV-grade LFP batteries with 10+ years of lifespan and 5-year warranty.”
- F3800, weight: Tech Specs table.
- F3800, price: List (strike-through) price for the base “Anker SOLIX F3800 Portable Power Station” option, labeled “6,000W | 3,840Wh | Up to 2400W Solar Input” in the Select Options panel. Anker showed a sale price of $1,999.99 that day through an auto-applied $200 code. Prices at other retailers differ.
What Anker SOLIX does not state
What a maker leaves out is a fact about the product too. Every gap on this unit’s page, named rather than quietly filled in. Of the 34 units we have transcribed, 29 omit at least one figure; this one omits 2 figures.
- A full wall-charge time. Absent from Anker SOLIX’s specifications for this unit when we checked.
- Operating noise. Absent from Anker SOLIX’s specifications for this unit when we checked.
- Usable capacity. Nobody states this, here or elsewhere. The rating describes the cells, not the outlet, and the difference depends on what you plug in.
Omissions are the industry norm rather than this maker’s failing. The point is that a confident figure for any of them, anywhere, came from somebody’s guess.
What it runs, and for how long
The appliance set is fixed across the site, which is what makes these hours comparable with any other page here.
| Appliance | F3800 |
|---|---|
| Full-size refrigerator 150 W, 900 W start, 35% duty · eff. 70%–82% |
2.1–2.5 days |
| Mini fridge 70 W, 400 W start, 30% duty · eff. 70%–82% |
5.3–6.2 days |
| CPAP without humidifier 40 W · eff. 70%–82% |
2.8–3.3 days |
| CPAP with heated humidifier 95 W · eff. 70%–82% |
28–33 hr |
| Gas furnace blower 400 W, 1600 W start, 40% duty · eff. 80%–87% |
19–21 hr |
| 1/3 hp sump pump 500 W, 1800 W start, 15% duty · eff. 80%–87% |
41–45 hr |
| Router and modem 20 W · eff. 70%–82% |
5.6–6.6 days |
| Laptop 60 W · eff. 70%–82% |
1.9–2.2 days |
| 1500W space heater 1500 W · eff. 85%–90% |
2.2–2.3 hr |
Calculated, not measured: hours = rated Wh × efficiency ÷ (appliance W × duty). Assumptions: How we verify. “Unlikely to start” means the start-up surge exceeds the stated surge rating.
The same specs, normalized
| Measure | F3800 |
|---|---|
| Cost per watt-hour | $0.57/Wh |
| Watt-hours per pound | 29.0 Wh/lb |
| Surge headroom | 1.50× |
| Recharge rate | Not available — Anker SOLIX does not state a full wall-charge time. |
| Rated cycle life | 3,000 cycles |
| Continuous watts per dollar | 2.73 W/$ |
These are measurements of shape, not scores. What each one means and which direction is better is on How we verify.
What those figures actually mean
Cost per watt-hour: $0.57/Wh. The $2,199.99 list price we recorded over 3,840 Wh of rated capacity. Capacity alone tells you nothing about value. This does, and it moves every time the price does.
Watt-hours per pound: 29.0 Wh/lb. 3,840 Wh in 132.3 lb makes this a cart-or-two-people unit. These cells are heavier per watt-hour than the ones they replaced, and last far longer. That is the trade the cycle rating prices.
Surge headroom: 1.50×. A stated 9,000 W surge over a 6,000 W continuous rating, which covers the roughly 900 W a full-size refrigerator needs to start. A unit with hours to spare and no headroom fails in the first second.
Continuous watts per dollar: 2.73 W/$. This one moves opposite to cost per watt-hour on most units, so a unit can look good on exactly one of them.
Where it sits in our database
Read against our own database rather than against the maker’s marketing, the figures place like this.
| Measure | F3800 | Among verified units |
|---|---|---|
| Rated capacity | 3,840 Wh | 2nd largest of 34 |
| Continuous AC output | 6,000 W | 1st highest of 34 |
| Cost per watt-hour | $0.57/Wh | 13th cheapest of 32 |
| Watt-hours per pound | 29.0 Wh/lb | 32nd densest of 34 |
| Weight | 132.3 lb | 34th lightest of 34 |
These positions describe size and price, not fitness for your outage. The row built on price uses the manufacturer list price recorded on 2026-09-12; the retail price behind our link moves independently, so recompute that row against what you are shown.
Three outages, and the figure that decides each
- One night, one CPAP. A 40 W CPAP without a humidifier calculates to 2.8–3.3 days. The stated up to 20 ms handover is what decides whether the machine notices the outage.
- Twelve hours, one refrigerator. A typical full-size refrigerator calculates to 2.1–2.5 days, and the stated 9,000 W surge covers its roughly 900 W start.
- The loads people forget. A gas furnace blower calculates to 19–21 hr and a one-third horsepower sump pump calculates to 41–45 hr. Both are hard-wired in most houses, which makes this an electrician’s question before it is a battery one. A router and modem, meanwhile, calculates to 5.6–6.6 days.
- Three days, with something to recharge from. The maker states no full wall-charge time, and it accepts up to 2,400 W of solar, so day two turns on your panels and your sky.
Questions people ask about the F3800
Every answer below comes from the tables above.
How long will the F3800 run a refrigerator?
2.1–2.5 days on our assumptions for a typical full-size unit at 150 W running and a 35% duty cycle. The stated surge covers the roughly 900 W start. Substitute the wattage from the label inside your door.
Can the F3800 run a CPAP all night?
Yes on capacity: a 40 W machine without a humidifier calculates to 2.8–3.3 days against the eight hours a night usually needs. The maker states up to 20 ms on the handover. Add a heated humidifier and the hours roughly halve.
How much does the F3800 weigh?
132.3 lb on the maker’s figure, or 29.0 Wh of rated capacity carried per pound. That is a cart-or-two-people unit, which is why units this size tend to stay where you put them.
Can you expand the F3800’s capacity?
Yes, to a stated 26,880 Wh with the maker’s expansion battery, up from 3,840 Wh alone. Expansion batteries are announced earlier than they ship; check availability.
Will the F3800 run a space heater?
It will, and it will empty the battery in 2.2–2.3 hr. Resistive heat drains any battery this size faster than anything else you can plug in.
What does the F3800 cost per watt-hour?
$0.57/Wh at the $2,199.99 list price we recorded. Sale prices move weekly, so recompute against the price you are offered.
Check the current price
That link points at the base unit we transcribed, not a kit with panels. Amazon prices change daily.
Related reading
The honest comparison is not with a bigger battery but with an engine: a 1,500 W space heater empties it in 2.2–2.3 hr, yet nothing here vents carbon monoxide into a garage. How often gasoline generators kill indoors — and how the official count keeps being revised — is documented in our CPSC revision matrix, while our refrigerator hub ranks every unit we have verified on the same twelve hours.
Ordering before a storm? Check the arrival date at checkout — a unit that ships tomorrow can beat a better one that ships next week. Amazon Prime includes fast delivery on eligible items and starts with a free trial; we earn a commission if you join.
Sources and method
- Anker SOLIX F3800: manufacturer product page, checked 2026-09-12.
Every quoted number comes from the maker’s page with its source sentence recorded. Every calculated number is marked as such and uses the formula above. Method: How we verify. More: Comparisons.