EcoFlow DELTA FAQs: Everything You Need to Know

If you're looking for more information about the EcoFlow DELTA portable power station, our support specialists have rounded up some answers to your most popular questions.


What is the battery capacity of DELTA?

DELTA has a battery capacity of 1260Wh (350,000mAh).

What is the lifespan of its battery?

DELTA’s battery maintains 80% capacity after 800+ cycles, which is much better than a phone or laptop battery.

How can I get the longest lifespan from its battery?

1. Keep it within 20–30°C (68–86°F) and away from water and heat.
2. For safety reasons, do not store DELTA above 45°C (113°F) or below −10°C (−14°F) for extended periods.
3. For long-term storage, discharge the battery to 30% and charge it to 85% every three months (products that have not been charged and discharged for more than 6 months are not covered under the product warranty).


What are all the ways to charge DELTA?

You can charge it from a wall outlet, car outlet, and solar panel. You can also charge it with a gas generator that provides AC power that is 220–240V (50Hz/60Hz) and at least 1500W.

Can I use DELTA while it’s charging?

Yes, DELTA can discharge when connected to an AC input, car outlet, or solar panel.

Can I charge DELTA with a third-party solar panel?

Yes, DELTA has a universal MC4 port, which makes it compatible with most solar panels that are 10–65V and DC 10A (max). We recommend using solar panels that have a combined wattage of around 400.


What devices can DELTA power?

Basically, DELTA can power anything that’s up to 1800W and that doesn’t peak above 3300W*. To put that in perspective:

Can I use all of the outlets at once?

Yes, as long as the combined output of what you’re charging doesn’t exceed 1800W*. We recommend testing your devices one at a time to see if they’re compatible with DELTA.

What should I do when DELTA won't charge anything?

1. If you’re trying to power something through DC or AC charging, check that the ON/OFF buttons for AC and DC are on.
2. If a device is drawing less than 1 watt from DELTA, it won’t show up on the LCD screen even though power is going to it.
3. If there is an overload protection indicator on the LCD screen, it means one or more things are trying to pull more than 1800W (or 3300W during a surge)*.

*The 4-outlet version of DELTA has 11 outlets and an output of 1600W (3100W surge).


Why doesn’t my DELTA charge to 100%?

You can do SoC calibration by fully discharging and recharging the battery.

What should I do when DELTA can’t charge from my car outlet?

1. Make sure your vehicle’s engine is on when trying to charge DELTA.
2. If other devices with a car outlet plug don’t work, it could be a problem with your car outlet.
3. If a solar panel or a third party XT60 cable can charge DELTA, it could be your XT60 charging cable.

Can I use DELTA as an uninterrupted power source (UPS)?

No, but it can be used as an emergency power source (EPS). Here’s the difference.

When your DELTA is plugged into the wall, anything plugged into it gets power from the grid, not its battery. If power from the grid stops, DELTA automatically switches to its battery supply mode within 30 milliseconds. That means anything connected will not have power for 30 milliseconds, which may mean desktop computers and data servers turn off. UPS is not necessary for most devices, but you’ll have to determine this for yourself.

Why are the icons on the LCD screen dim?

Place DELTA on a hard surface.

Why does DELTA power off automatically?

1. The battery may have died.
2. DELTA will automatically turn off if the AC and DC power buttons are turned off, and there is no input or output power for 30 minutes.

What should I do if DELTA won’t turn on?

1. It might not have enough battery. Try charging it and restarting it.
2. If DELTA’s battery went to 0%, you might see an overheating protection icon on the LCD screen. Wait for the unit to cool before recharging it.

Can I link the EcoFlow Smart Extra Battery with DELTA?

No, but you can connect up to 2 DELTA units for twice the battery life.

How do I connect two DELTA units together?

1. Fully charge both DELTAs.
2. Make sure they’re disconnected from the wall when being used.
3. Plug one DELTA into the other’s AC wall outlet.

We hope these FAQs answered your question. If you have anything else you’d like to know, give us a shout at EcoFlow Support!