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How does the DELTA Pro Ultra compare?
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GridMatch assessment
Editorial take by GridMatch Editors
The EcoFlow DELTA Pro Ultra is a modular whole-home backup system: one inverter plus one 6.1 kWh LiFePO4 battery, expandable to 90 kWh with up to 15 batteries. A single inverter delivers 7,200 W continuous (120V/240V) with enough headroom for heavy loads like a 3-ton central AC; stack three inverters with Smart Home Panel 2 for 21.6 kW. One battery recharges in about 2 hours via EV charger, solar (up to 5,600 W), wall outlet, or generator. Online UPS on the station itself is 0 ms for sensitive gear; Smart Home Panel 2 adds ~20 ms whole-home auto-switchover, circuit prioritization, and peak-rate / solar offset via the EcoFlow app. X-Fusion keeps full 7,200 W output even while charging.
Verdict: Best for Large Homes
What works
- Best for Large Homes
- Native 120V/240V output
- Expandable to 90kWh
- Automatic transfer / switchover path
- 20 ms UPS switchover
Tradeoffs
- Heavy at 186.4 lb
Full Specifications
Technical Specifications
Runtime Quick-Check
Runtime Quick-Check
Pick a battery and an appliance — see days of runtime after the 0.85 inverter derate.
Formula: (6144 Wh × 0.85) ÷ 1.26 kWh/day = 4.1 days. Continuous draw ≈ 1.5 days at full load.
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