EcoFlow DELTA 3 Classic

EcoFlow · model EFDELTA3C-US-L

Power Station · Battery (LiFePO4)

EcoFlow DELTA 3 Classic

~$599approx. list price

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  1. 800 WLights, phones, router, a CPAP
  2. 2,200 WFridge, freezer and the essentials
  3. 4,000 WFurnace blower, sump pump or a window AC
  4. 7,500 WWell pump or a small central AC
  5. 18,000 WWhole home with central air

1,800 W running, 3,600 W surge — sustains the lights, phones, router, a CPAP tier.

Best forHome backup buyers who need a fridge, modem and CPAP covered for an evening and do not need a crowd of outlets.

The stripped-down version of EcoFlow's 1kWh line usually sells for less than the Plus it was spun out of. You keep the 1,800W inverter with 3,600W surge, X-Boost up to 2,600W for resistive loads, the 10ms switchover and the LiFePO4 cells, and lose outlets: three AC receptacles instead of six, and one 100W USB-C plus a 30W one instead of dual 140W. Owners who just want a fridge, router and CPAP kept alive through a day-long outage say that is plenty; people who plug in a power strip on day one wish they had paid for the Plus. The 45-minute 0-80% AC recharge is the real draw, and the fan is audible under heavy charge. It takes the same extra batteries as the rest of the DELTA 3 family, up to 5kWh, though those packs cost nearly as much as another unit.

From the spec sheet

Specifications

Battery capacity
1,024 Wh
Expandable to
5,000 Wh
Continuous output
1,800 W
Surge output
3,600 W
Runtime
Fridge (~150W): ~6 hrs on base unit (noise figure is at 600W load)
Type
Power Station
Fuel
Battery (LiFePO4)
Noise
30 dB
Outlets
3x 120V AC (two 20A, one 15A), 1x 100W USB-C, 1x 30W USB-C, 1x 18W USB-A
Transfer-switch ready
No
Weight
26.7 lbs
Warranty
3-year standard, 5-year with app registration
Model
EFDELTA3C-US-L

1800W / 3600W surge·0-80% in 45 minutes·Expandable to 5kWh

At a glance

Strengths

  • +10ms auto-switch lets it act as a UPS for NAS boxes and routers
  • +X-Boost carries resistive loads to 2,600W, enough for a kettle or small space heater
  • +500W solar input accepts a wide voltage range
  • +LiFePO4 cells, 10-year design life claimed
  • +Cheaper than the Plus at the same capacity and inverter size

At a glance

Drawbacks

  • −Only three AC outlets, so a power strip is almost mandatory
  • −USB-C ports are 100W and 30W, below the Plus
  • −Fan is audible during fast charging; the 30dB figure only holds at 600W load
  • −Extra batteries are priced close to a second unit
  • −Account-based app needed for the full feature set

Head to head

Compare the EcoFlow DELTA 3 Classic

vs DJI Power 1000 V2vs EcoFlow DELTA 3 Plus

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EcoFlow DELTA 3 Plus
~$649

Power Station · Battery (LiFePO4) · 30 dB

EcoFlow DELTA 3 Plus

1,800 W / 3,600 W surge · up to lights, phones, router, a CPAP

capacity
1,024 Wh
expands to
5,000 Wh

Best for Apartment dwellers and network-gear owners who want a set-and-forget UPS that doubles as camping power.

Full spec sheetCheck price on Amazon
EcoFlow RIVER 3 Plus
~$299

Power Station · Battery (LiFePO4) · 30 dB

EcoFlow RIVER 3 Plus

600 W / 1,200 W surge

capacity
286 Wh
expands to
858 Wh

Best for Renters and apartment owners who need a quiet UPS and phone-and-modem backup, plus an easy campsite companion.

Full spec sheet
EcoFlow DELTA 3 Max Plus
~$1,049

Power Station · Battery (LiFePO4) · 30 dB

EcoFlow DELTA 3 Max Plus

3,000 W / 6,000 W surge · up to fridge, freezer and the essentials

capacity
2,048 Wh
expands to
10,000 Wh

Best for Households wanting one box that handles kitchen appliances plus a couple days of fridge backup.

Full spec sheetCheck price on Amazon
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