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PORTABLE POWER GUIDE
REVIEW

EcoFlow DELTA Pro Review

The EcoFlow DELTA Pro is whole-home-class backup in a (barely) portable box: 3,600 Wh and a 3,600 W inverter, expandable to 25 kWh, with a 30A outlet for RV and transfer-switch duty.

By Portable Power Guide · Updated

Key Specs

Capacity
3,600 Wh
Inverter output
3,600 W(7,200 W surge)
Recharge (AC)
≈108 min(0–100%)
Weight
99 lbs
Chemistry
LiFePO4(3,000+ cycles)

What We Like

  • ✓3,600 Wh base capacity — largest single unit in our database
  • ✓3,600 W inverter with 7,200 W surge starts nearly any household motor
  • ✓Expandable to 25,000 Wh with extra batteries
  • ✓1,600 W solar input actually refills a pack this size in a day
  • ✓30A output for RV hookups and transfer switches

What We Don't Like

  • −99 lbs — wheeled, but a two-person lift over any threshold
  • −$2,799 MSRP before any expansion batteries
  • −Complete overkill for camping and device charging

Capacity

3,600 Wh base is nearly double the 2 kWh class, and the 25 kWh expansion ceiling is the highest we track. Sized against the calculator, the base unit alone covers a fridge, router, phone charging, and lights for a weekend-length outage.

Output

3,600 W continuous matches a 30A household circuit, and the 7,200 W surge is what lets it start well pumps, sump pumps, and RV air conditioners — the motor loads that define whether backup power actually works in an outage.

Charging

About 108 minutes from empty on wall power is remarkable for 3.6 kWh. The 1,600 W solar ceiling matters just as much: at full input, the pack refills in about 2.3 hours of ideal sun (3,600 ÷ 1,600 ≈ 2.25), making daily solar cycling realistic.

Portability, honestly

99 lbs with wheels and a telescoping handle rolls fine on hard floors and fails at stairs. Plan a resting place near the loads it will serve; this is furniture that moves, not luggage.

Amp-hours, for anyone comparing with RV batteries

EcoFlow rates the pack in watt-hours, and amp-hours only mean something at a stated voltage. At the 12 V that RV and marine batteries are labelled in, 3,600 Wh is 300 Ah (3,600 ÷ 12); at 48 V it is 75 Ah. So the DELTA Pro holds as much energy as three 100 Ah 12 V lithium batteries — with the inverter, charger and solar controller already built in.

The Verdict

The DELTA Pro is the point where a portable power station starts doing a standby generator's job. Its 3,600 Wh — about 3,060 usable at 85% efficiency — runs a 150 W refrigerator for roughly 20 hours (3,600 × 0.85 ÷ 150 ≈ 20.4), and expansion batteries stretch the system to 25 kWh, which is multi-day whole-home-essentials territory. The 3,600 W inverter with 7,200 W surge starts well pumps and AC compressors that stall smaller units. The cost is literal: $2,799 MSRP and 99 lbs.

Bottom line

If the job is keeping a household running through outages, this is the spec sheet that does it. If the job is anything smaller, buy anything smaller.

Top Alternatives

EcoFlow DELTA 2 Max

Expandable 2 kWh platform with serious solar input.

Capacity
2,048 Wh
AC output
2,400 W
Chemistry
LiFePO4
Fridge-days
≈ 4.6
$1,899 MSRP Read the review →

Jackery Explorer 2000 Plus

3,000 W inverter and huge expansion ceiling for RV and home duty.

Capacity
2,042 Wh
AC output
3,000 W
Chemistry
LiFePO4
Fridge-days
≈ 4.5
$2,199 MSRP Read the review →

BLUETTI AC200L

High-capacity home-backup value with 30A RV output.

Capacity
2,048 Wh
AC output
2,400 W
Chemistry
LiFePO4
Fridge-days
≈ 4.6
$1,699 MSRP Read the review →

EcoFlow DELTA 3 Ultra

3 kWh of whole-home backup that expands to 11 kWh, at the best price per watt-hour in the database.

Capacity
3,072 Wh
AC output
3,600 W
Chemistry
LiFePO4
Fridge-days
≈ 6.8
$1,599 MSRP Review pending