In short
The EcoFlow DELTA Pro 3 stores 4.1 kWh (up to 12 kWh with extra batteries) and delivers 4.0 kW at 120/240 V. Of the 32 household loads we track, it can start and carry 28 on its own. A refrigerator alone runs about 3.4 days on one charge.
We may earn a commission if you buy through links on this page, at no extra cost to you. We haven't tested this unit: figures come from EcoFlow's published specs and our stated method, checked October 28, 2026.
EcoFlow
4 kWh with 120/240 V; grows to 12 kWh per unit. EcoFlow's Smart Generator can top it up on long outages.
† reported by retailers or reviews, not yet confirmed on EcoFlow's spec sheet.
$2,799list $3,299 · out of stock when checked, October 28, 2026
Check priceEach scenario starts at 6 p.m., battery only, no solar. Extra batteries are added when the maker sells them and the outage needs them.
48 h outage
Storm night + sump pump
Covers your list
Lasts 2.0 days+ with 2 extra batteries
Open in the planner72 h outage
Rural: well pump & freezer
Runs it, but not for the whole outage
Lasts 2.7 days with 2 extra batteries
Open in the planner72 h outage
Winter: gas furnace
Runs it, but not for the whole outage
Lasts 21 h with 2 extra batteries
Open in the plannerTypical daily use for each appliance, on a full charge. “Surge not published” means EcoFlow doesn't state a start-up rating high enough for us to promise it.
| Appliance | Running / start | Runs it? | Runtime |
|---|---|---|---|
| Refrigerator | 700 W / 2.9 kW | Yes | 3.4 days |
| Chest freezer | 700 W / 2.9 kW | Yes | 6.1 days |
| Microwave | 1.0 kW / 1.0 kW | Yes | 14 days |
| Coffee maker | 1.0 kW / 1.0 kW | Yes | 14 days |
| Hot plate / one burner | 1.3 kW / 1.3 kW | Yes | 5.5 days |
| Dishwasher | 1.2 kW / 2.4 kW | Yes | 3.0 days |
| Sump pump, 1/3 HP | 800 W / 1.3 kW | Yes | 2.3 days |
| Sump pump, 1/2 HP | 1.1 kW / 3.2 kW | Yes | 41 h |
| Well pump, 1/2 HP (240 V) | 1.0 kW / 3.1 kW | Yes | 2.4 days |
| Gas furnace blower, 1/2 HP | 875 W / 3.2 kW | Yes | 8.2 h |
| Space heater | 1.5 kW / 1.5 kW | Yes | 9.6 h |
| Window AC, 12,000 BTU | 3.3 kW / 7.2 kW | Yes | 3.3 h |
| Dehumidifier | 840 W / 1.7 kW | Yes | 13 h |
| CPAP, no humidifier | 30 W / 30 W | Yes | 15 days |
| CPAP with heated humidifier | 65 W / 65 W | Yes | 6.9 days |
| Oxygen concentrator (home, 5 L) | 350 W / 350 W | Yes | 10 h |
| Wi-Fi router + modem | 10 W / 10 W | Yes | 15 days |
| Starlink Standard dish | 100 W / 100 W | Yes | 36 h |
| Starlink Mini | 40 W / 40 W | Yes | 3.8 days |
| Phones & tablets charging | 20 W / 20 W | Yes | 21 days+ |
| Laptop | 50 W / 50 W | Yes | 12 days |
| Desktop computer | 200 W / 200 W | Yes | 4.5 days |
| TV (flat screen) | 120 W / 120 W | Yes | 7.5 days |
| Security system | 200 W / 200 W | Yes | 18 h |
| LED lights (about 6 bulbs) | 60 W / 60 W | Yes | 10 days |
| Washing machine | 1.1 kW / 3.5 kW | Yes | 3.1 days |
| Garage door opener, 1/2 HP | 875 W / 3.2 kW | Yes | 21 days+ |
| EV charging, Level 1 (120 V) | 1.4 kW / 1.4 kW | Yes | 15 h |
| Electric water heater, 50 gal | 4.5 kW / 4.5 kW | Output too low | — |
| Central AC, 2 ton | 3.8 kW / 8.8 kW | Can't start it | — |
| Heat pump | 4.7 kW / 9.2 kW | Output too low | — |
| Electric dryer | 4.8 kW / 9.7 kW | Output too low | — |
88% inverter efficiency, battery only. Wattages and sources: appliance wattage table.
| Station | Capacity | Output | Surge | 240 V | Price |
|---|---|---|---|---|---|
| EcoFlow DELTA Pro 3 | 4.1 kWh | 4.0 kW | 8.0 kW | Yes | $2,799 |
| BLUETTI Apex 300vs | 2.8 kWh | 3.8 kW | not published | Yes | $1,599 |
| Anker SOLIX F3800 Plusvs | 3.8 kWh | 6.0 kW | not published | Yes | $2,399.99 |
| Jackery HomePower 3600 Pro Maxvs | 3.6 kWh | 4.0 kW | 8.0 kW | Yes | $1,799 |
† Flagged on this page: surge, solar input, weight, extra battery size. Read from retailers or reviews, not yet on EcoFlow's own spec sheet.
Yes. It covers a refrigerator's start-up peak, and an ENERGY STAR fridge alone would run for about 3.4 days on a full charge, battery only.
It can feed selected circuits, including 240 V ones like a well pump, through a transfer switch (Smart Home Panel 2 (installed)) installed by a licensed electrician. It can't run everything at once: its limit is 4.0 kW continuous.
With panels at its 2.6 kW solar limit, expect roughly 4.1 kWh back on a clear day (our clear-day solar curve, the same one the planner uses), so about 100% of the battery.