How long will a Anker SOLIX F3800 keep your power on?
With no sun, one Anker SOLIX F3800 runs a fridge, freezer, furnace fan, lights, Wi-Fi, TV and microwave for about 11 h. Add a portable solar panel and it lasts longer on sunny days.
Anker SOLIX F3800 is a 3.84 kWh portable station with a 6 kW inverter and expansion batteries.
Runtime for one appliance at a time
| Appliance | kWh/day | Runtime | Power OK? |
|---|---|---|---|
| Refrigerator | 1.4 | 58 h | ✓ |
| Chest freezer | 0.8 | 4.1 days | ✓ |
| Modem + Wi-Fi router | 0.5 | 6.8 days | ✓ |
| LED lights (6 rooms) | 0.3 | 10.9 days | ✓ |
| Phones & laptop charging | 0.2 | 18.1 days | ✓ |
| Gas furnace blower (winter) | 3.0 | 26 h | ✓ |
| TV + streaming box | 0.5 | 6.8 days | ✓ |
| Box / ceiling fans (2) | 0.8 | 4.1 days | ✓ |
| Window AC (one room) | 7.2 | 11 h | ✓ |
| Central AC (3-ton) | 28.0 | 3 h | check surge |
| Heat pump heating (winter) | 30.0 | 3 h | ✓ |
| Space heater | 6.0 | 13 h | ✓ |
| Well pump (1 hp) | 1.0 | 3.3 days | ✓ |
| Sump pump (⅓ hp, storm) | 1.6 | 49 h | ✓ |
| Electric water heater | 9.0 | 9 h | ✓ |
| CPAP (no humidifier) | 0.3 | 10.2 days | ✓ |
| Oxygen concentrator | 8.4 | 9 h | ✓ |
| Microwave | 0.3 | 9.9 days | ✓ |
| Coffee maker | 0.2 | 18.1 days | ✓ |
| Electric cooktop (1 burner) | 1.1 | 70 h | ✓ |
| Washing machine (1 load) | 0.5 | 6.5 days | ✓ |
| EV charging (Level 1, 120 V) | 5.6 | 14 h | ✓ |
Typical running watts × hours a day; starting full, no recharge. “Check surge” means the motor’s start-up draw may exceed the battery’s surge rating.
Runtime for common outage plans
| What stays on | kWh/day | 1 unit | 2 units |
|---|---|---|---|
| Keep the food cold & lights on | 2.3 | 34 h | 68 h |
| Essentials + furnace fan + TV | 6.9 | 11 h | 23 h |
| Rural: essentials + well + sump | 6.0 | 13 h | 26 h |
| Summer outage with window AC | 10.8 | 7 h | 14 h |
| Medical: CPAP + essentials | 2.6 | 30 h | 59 h |
| Most of the house incl. central AC | 33.5 | ✗ power | 5 h |
“✗ power” means everything switched on at once would draw more than the battery can deliver.
Questions about the Anker SOLIX F3800
How long will a Anker SOLIX F3800 run a refrigerator?
About 58 h on its own, with no solar recharge, for a typical fridge using 1.4 kWh a day.
Can a Anker SOLIX F3800 run central air conditioning?
It can supply the roughly 3.5 kW a 3-ton unit draws, but at about 28 kWh on a hot day it would empty quickly. Check its motor-start (surge) rating with your installer.
How many Anker SOLIX F3800 units do I need for whole-home backup?
Roughly 8 for a house with central AC and electric cooking, sized both for energy (a day of use) and for power (everything running at once). For essentials only, one or two are usually enough.
Can solar panels recharge a Anker SOLIX F3800 during a power outage?
Yes, from portable or roof panels wired to its solar input.
Compare with other batteries
| Battery | Usable kWh | kW | Essentials runtime |
|---|---|---|---|
| Tesla Powerwall 3 | 13.5 | 11.5 | 44 h |
| FranklinWH aPower 2 | 15 | 10 | 49 h |
| Enphase IQ Battery 5P | 5 | 3.84 | 16 h |
| SolarEdge Home Battery | 9.7 | 5 | 32 h |
| Generic 10 kWh home battery | 10 | 5 | 33 h |
| EcoFlow DELTA Pro Ultra (1 battery) | 6.1 | 7.2 | 18 h |
| Jackery Explorer 2000 Plus | 2.04 | 3 | 6 h |
| EcoFlow DELTA 2 (1 kWh class) | 1.02 | 1.8 | 3 h |
Specifications are manufacturer figures as of September 2026. We are not paid by any manufacturer. Verify the current datasheet before you buy.