Best overall in power stations and solar
A 1 kWh LFP power station that switches over in under 10 ms, recharges fast and takes an extra battery; 120 V only, so it backs up essentials, not the house.
Our score: 8.2/10 out of 10Researched, not lab-tested
- Battery capacity
- 1,024 Wh
- AC output (continuous)
- 1,800 W
- Cell chemistry
- LiFePO4 (LFP)
- Solar input (max)
- 1,000 W
Is it right for you?
Pros
- 1,024 Wh LFP battery rated 4,000 cycles to 80%
- 1,800 W AC (3,600 W surge) from six outlets
- UPS switchover under 10 ms, per EcoFlow
- Up to 1,500 W wall charging and 1,000 W solar input
Cons
- 120 V only: no well pump or other 240 V loads
- 1 kWh covers a fridge for hours to a day, not days
- Extra battery connects by a separate cable
- No user manual linked: cold-charging limits unconfirmed
- Best for
- Keeping a fridge, CPAP, modem or plug-in furnace blower going through shorter outages, silently and indoors, with solar to stretch it.
- Not for
- Whole-house backup, 240 V well pumps, or multi-day outages without solar or a generator to recharge it.
Our verdict
The DELTA 3 Plus is the power station we would start with for a house that wants silent, fume-free backup for a few essentials. Its 1,024 Wh LFP battery is rated for 4,000 cycles to 80%, and six AC outlets share 1,800 W, with 3,600 W of surge for motors starting up. In UPS mode EcoFlow says it switches to battery in under 10 ms, so a modem, CPAP or fridge plugged through it should ride through a cut without noticing.
It recharges fast: up to 1,500 W from the wall, up to 1,000 W from solar over two inputs, or from a car alternator charger. When one battery isn’t enough, an extra DELTA battery plugs in by cable. EcoFlow sells the same model, EFDELTA3P-US, in its Canadian store, and gives it a five-year warranty.
The limits are the usual ones for this size. It is 120 V only, so no well pump or anything on a 240 V breaker, and 1 kWh runs a fridge for hours to about a day rather than days. EcoFlow’s product page gives no cold-weather charging limits for this model.
Setup and safety
Indoors is fine. A battery makes no exhaust, so unlike a generator it can sit beside the fridge or the bed. Plug appliances straight into it, or use a proper extension cord. Never connect it to a wall outlet with a male-to-male cord to feed the house: that backfeeds the wiring and can endanger line workers (how a transfer switch or interlock prevents it).
Be realistic about what it runs. Forum threads about power stations repeat one lesson: buyers expected “whole home” and found that a 1 to 2 kWh station covers a fridge or a CPAP for hours, not a sump pump for days. List what must run and its running and starting watts, then check the time against 1,024 Wh. Solar panels or a generator stretch a long outage.
Keeping it ready. The app has a storm-warning charging mode that tops the battery up ahead of bad weather, and a time-of-use mode. If you want it on house circuits, see the bigger EcoFlow DELTA Pro 3, which connects to a panel through an electrician-installed transfer device; the DELTA 3 Plus is a plug-in box.
Specs
EcoFlow DELTA 3 Plus Portable Power Station (1024Wh)
Battery
| Battery capacity | 1,024 Wh |
|---|---|
| AC output (continuous) | 1,800 W |
| 240 V output | No |
| Cell chemistry | LiFePO4 (LFP) |
| Cycle life | 4,000 cycles |
| AC surge | 3,600 W |
Charging
| Solar input (max) | 1,000 W |
|---|---|
| UPS switchover | 10 ms |
| Wall charging (max) | 1,500 W |
Other details
| Weight | 27.6 lb |
|---|---|
| App control | Yes |
| Warranty | 5 years |
Maker’s figures, checked 3 Nov 2026.
DELTA 3 Plus questions
Can the DELTA 3 Plus run a fridge through an outage?
Yes, for a while. A fridge cycles on and off, so 1,024 Wh typically covers it for hours to about a day depending on the model and how often the door opens. EcoFlow’s 1,800 W output and 3,600 W surge handle the compressor starting. For a multi-day outage, recharge from solar or a generator, or add EcoFlow’s extra battery.
Can it power my furnace or sump pump?
A furnace blower or sump pump that has a plug can run from its outlets, within 1,800 W, but a hardwired furnace needs an electrician-installed inlet or transfer switch first. A sump pump in a wet spring can drain 1 kWh quickly, so for flooding a battery backup sump pump is the dedicated answer.
Is it sold in Canada?
Yes. EcoFlow’s Canadian store carries the same model, EFDELTA3P-US, so specs and accessories match.
Does it need ventilation like a generator?
No exhaust, no carbon monoxide: that is the main reason to choose a battery for indoor use. Give it room around its vents so it can cool, and keep it dry. EcoFlow quotes under 30 dB at 600 W, so it is quiet enough for a bedroom.