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Anker SOLIX F3800 sizing guide
A 6,000 W, 240 V system for whole-home backup including a well pump and electric range, expandable to ~27 kWh. Here's exactly what it runs, how long, and which outages it covers — computed, not marketed.
120/240 V; expandable to 26.9 kWh · 132 lb · 120/240 V AC (incl. 30 A), USB-A/C · expandable with add-on batteries.
What the F3800 runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~66 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~99 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~86 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~72 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~9.9 h |
| Space Heater (1500 W) | 1,500 W | yes | ~2.3 h |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~6.9 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | yes | ~4.5 h |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | yes | ~8.6 h |
| Microwave (1000 W cooking) | 1,200 W | yes | ~2.9 h |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~22 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | yes | ~16 h |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | yes | ~23 h |
Runtime uses each load's duty-weighted average draw against 90% of the rated capacity — conservative on purpose. Cyclic loads (fridges, pumps) run far longer than running-watts × capacity would suggest.
Outages the F3800 covers
Common questions
What can the Anker SOLIX F3800 run?
With 6,000 W of continuous output and a 9,000 W surge rating, the Anker SOLIX F3800 runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, space heater (1500 w), and more. Its 3,840 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Anker SOLIX F3800 run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Anker SOLIX F3800's 3,840 Wh runs one for roughly 66 h before recharging.
Specs: Manufacturer published specifications (approximate; confirm on the current product page) (compiled 2026-06-15). Informational only — a computed sizing estimate from published appliance-wattage charts and manufacturer station specs. It is not an electrical guarantee. For hardwired or whole-home backup, transfer switches, or any permanent install, consult a licensed electrician.