The EcoFlow DELTA Pro Ultra Inverter is the 32.1 kg hub that drives the modular DELTA Pro Ultra home battery system. On its own it does not store energy, but it delivers up to 6,900 W of single-phase AC output, handles a peak of 10,300 W for up to 10 seconds and accepts a combined solar plus grid input of up to 8,800 W. Housed in an IP54 enclosure with a noise level below 30 dB, it is designed for a utility room or garage rather than a countertop.

• Maximum AC output of 6,900 W across five outlets, enough to run a fridge, boiler and even an EV charger.
• PV input split into a 4,000 W HPV channel (80-450 V) and a 1,600 W LPV channel (30-150 V), so up to ten 400 W panels can be wired in series.
• X-Fusion technology keeps output constant while the batteries are recharging.
• UPS switchover in under 20 ms, protecting sensitive electronics during grid dips.
• Wi-Fi and Bluetooth control through the EcoFlow app for scheduling, monitoring and Storm Guard automatic pre-charge.
• Compatible with up to five DELTA Pro Ultra batteries for a stackable capacity of 30 kWh.

Key specs

• AC output: 6,900 W total (5 outlets, 16 A x 4 and 30 A x 1)
• AC inlet: 200-240 V, 30 A, 6,900 W max
• PV input: 4,000 W HPV + 1,600 W LPV, up to 450 V
• Generator input: 2,800 W max
• Grid input: 2,800 W max
• Solar + grid: 8,800 W max
• UPS switchover: <20 ms
• IP rating: IP54
• Weight: 32.1 kg; dimensions 69 x 48.1 x 21.4 cm
• Warranty: 5 years

A good match for a whole-house backup, a workshop or a small business that wants to add batteries progressively and eventually cover multi-day outages.