EcoFlow DELTA 3 Max: how long for each device?
With a 2,048 Wh battery, here is what the EcoFlow DELTA 3 Max can run, device by device, and what it cannot start.
- Battery
- 2,048 Wh
- Max power
- 2,400 W
- Weight
- 20.3 kg
- Max solar
- 500 W
| Device | Lasts | Starts it? |
|---|---|---|
| Fridge | ≈ 32 h | yes |
| Chest freezer | ≈ 35 h | yes |
| Internet router | ≈ 87 h | yes |
| Gas boiler | ≈ 1.6 days | yes |
| CPAP machine | ≈ 9.9 nights | yes |
| Laptop | ≈ 25 h | yes |
| TV | ≈ 19 h | yes |
| LED lamp | ≈ 97 h | yes |
| Phone | ≈ 116 charges | yes |
It’s an estimate. We take the battery size the brand gives, remove 15% for losses, and use the device’s average draw. Yours may use more or less: check its label.
What this station is
The EcoFlow DELTA 3 Max stores 2,048 Wh of energy, as announced by the brand. Its outlets can give up to 2,400 W at the same time: add up the watts of everything you plug in and stay under that number. It is a large station: it can keep the essentials of a home going for a day or more, fridge included.
Its battery is LFP (lithium iron phosphate). This type usually keeps most of its capacity after thousands of charges, so it suits a station you use often. At 20.3 kg, plan two hands or a trolley. Choose where it lives before an outage.
During a power cut
A simple day without power: the internet router on for 24 hours, two LED lamps for 6 hours, a phone charging for 3 hours, and the station itself switched on. That comes to 606 Wh per day. The EcoFlow DELTA 3 Max covers about 2.9 days of that.
Add an average fridge (45 W on average) and the EcoFlow DELTA 3 Max keeps it going for about 32 h on its own, or 1 day with the basic needs above on top.
The brand announces a switch-over time of 10 ms: if mains power drops, devices plugged into it keep running. Useful for a router or a computer.
Charging it
It accepts up to 500 W of solar panels. Even in full sun, a full charge takes at least 4.1 h. In practice panels give less than their rated watts, so count on longer, often a few days in winter.
Questions about this station
How many days of power cut does the EcoFlow DELTA 3 Max cover?
About 2.9 days for the basics: router, two LED lamps, a phone and the station itself, 606 Wh per day. Each extra device shortens that time. Try your own list in the calculator.
How long can the EcoFlow DELTA 3 Max run a fridge?
About 32 h for an average fridge (45 W on average), or 1 day if you also keep the router, two lamps and a phone going. A big or old fridge uses more.
Can the EcoFlow DELTA 3 Max run a CPAP machine all night?
Yes. A CPAP without heated humidifier uses about 12 W. Over 8 hours, with the station itself switched on, that is 176 Wh per night, so about 9.9 nights. The heated humidifier uses much more: turn it off, or use the 12 V cable sold by the CPAP maker.