Overview
The EcoFlow DELTA Pro has been our reference whole-home backup unit since its release. With 3600Wh of LiFePO4 capacity (expandable to 25kWh with extra batteries), X-Boost inverter output to 4500W, and direct integration with EcoFlow's Smart Home Panel, it is the only portable power station we have tested that can replace a small dual-fuel generator for whole-home backup.
What we tested
- Real usable capacity at 1500W and 2500W continuous AC loads
- Smart Home Panel integration with a real residential load panel (15 circuits)
- X-Boost output above the rated 3600W inverter
- Solar input up to the 1600W MPPT limit
- Sustained hot-swap Extra Battery addition under load
- App features including remote firmware, real-time grid monitoring, and time-of-use arbitrage
Capacity and efficiency
At a 1500W draw the DELTA Pro delivered 3385Wh — about 94% of the 3600Wh spec. At 2500W efficiency held at 91% (3276Wh). X-Boost mode lets the inverter sustain resistive loads up to 4500W at reduced voltage — confirmed with a 4200W electric oven coil running for 9 minutes before thermal throttling.
Whole-home backup
The DELTA Pro + Smart Home Panel config ran a 15-circuit residential subpanel with a fridge (180W), freezer (120W), internet gear (50W), lights (80W), boiler (90W), and a sump pump (~600W surge during cycles) for a 14-hour simulated outage. Two Extra Batteries added (3 total units) lifted total runtime to ~36 hours.
Charging
AC charging is no longer class-leading — newer units like the Anker SOLIX F3800 charge faster. But the 1600W max solar input remains the highest of any portable unit, and the DELTA Pro can solar-charge while running a 1000W AC load simultaneously — useful for daytime runtime extension.
App
EcoFlow's app remains the gold standard. Real-time grid monitoring (with the Smart Home Panel), scheduled charge/discharge windows for time-of-use arbitrage, and per-circuit runtime estimates all work reliably.
What we liked
- 3600Wh LiFePO4 expandable to 25kWh
- Smart Home Panel integration is genuinely well-engineered
- X-Boost to 4500W on resistive loads
- Class-leading 1600W solar input
What we didn't
- 45kg is stationary only — not portable in any practical sense
- Premium pricing vs. Bluetti AC300 + B300 stack
- AC charging is slower than the newer Anker SOLIX F3800
Verdict
For whole-home backup buyers willing to invest in a Smart Home Panel + 2 Extra Batteries, the DELTA Pro is the most refined solution on the market in 2026. For pure RV or camping use, the DELTA 2 or Bluetti AC200L remain better values.
The most capable portable power station on the market in 2026 — recommended for buyers who need whole-home backup, not just essentials. Buyers buying only for camping or RV should look at the DELTA 2 instead.