Head to head · 2026
EcoFlow DELTA Pro 3 vs EcoFlow DELTA Pro
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Contender A
EcoFlow DELTA Pro 3
Premium Pick4kWh, 4,000W, and 120/240V from a single unit — the first battery that fully replaces a generator for most homes.
$3,699on Amazon
Price as of Sep 22, 7:20 PM ET — subject to change.
Contender B
EcoFlow DELTA Pro
Best Overall3.6kWh, 3,600W output, expandable to 25kWh — a battery that behaves like a generator.
$1,899on Amazon
Price as of Sep 22, 7:20 PM ET — subject to change.
Our verdict
Generational sibling rivalry with a clear dividing line: the Pro 3 adds single-unit 240V output, more capacity (4.1 vs 3.6kWh), more output (4,000 vs 3,600W), faster solar, and true UPS switchover. The original's answer is price — it sells in the $1,500s regularly, a 40% discount for giving up features many homes never use. Need 240V or UPS behavior? Pro 3. Otherwise the original is the smarter check to write.
Pick the EcoFlow if…
- ✓240V loads: well pump, transfer-switch integration
- ✓UPS-grade switchover for computers and medical gear
- ✓Maximum solar input (2,600W) for off-grid ambitions
Pick the EcoFlow if…
- ✓Sale pricing makes it the category's value king
- ✓120V essentials backup is the whole mission
- ✓You'd rather put the savings toward solar panels
Spec by spec
| Spec | EcoFlow DELTA Pro 3 | EcoFlow DELTA Pro |
|---|---|---|
| Our score | 9.2 / 10 | 9.0 / 10 |
| Capacity | 4,096Wh (LFP, expandable) | 3,600Wh (LFP, expandable to 25kWh) |
| AC output | 4,000W continuous, 120/240V dual voltage | 3,600W continuous / 7,200W surge |
| Outlets | Multiple AC incl. 240V, USB-C, 12V | 5× AC incl. 30A, USB-C 100W, 12V |
| Solar input | Up to 2,600W | Up to 1,600W |
| UPS switchover | <20 ms | — |
| Cycle life | 4,000 cycles to 80% | 6,500 cycles to 50% / 3,500 to 80% |
| Weight | ~115 lb | 99 lb |
| Warranty | 5 years | 5 years |
| Wall charge | — | 0–80% in ~1 hr |
Still deciding?
Read the full reviews for the complete story, or check both current prices — sale pricing swings this class of decision all the time.
$3,699on Amazon
Price as of Sep 22, 7:20 PM ET — subject to change.
$1,899on Amazon
Price as of Sep 22, 7:20 PM ET — subject to change.