≈ 0.9 days (24h/day) · Safe motor start buffer (33.3% margin).
1/2 HP well pump running (1,250 W max) and start-up (3,800 W max) draw fit the EcoFlow DELTA 2 Max's 2,400 W continuous / 4,800 W surge ratings.
shallow water table with low head pressure demand (850 W run, 2,500 W surge)
standard 100-ft deep residential well cycling on 30/50 PSI pressure switch (1,050 W run, 3,200 W surge)
deep drawdown or continuous tank refill against high head pressure (1,250 W run, 3,800 W surge)
≈ 0.9 days (24h/day)
System standby power: 15W (16% of total draw)
Provides 6× CEE 7/3 (230V) (120V 60Hz).
Pure sine wave inverter output. Safe for sensitive medical electronics and variable-speed motors.
Inductive motor/compressor load with 3× starting surge (motor inrush) (33.3% worst-case surge margin).
Wall AC fast charge at up to 1800W (66m to 80%, 80m to 100%).
Safe envelope verified: Starting surge (3200W) remains comfortably below the 4800W surge trip line, with steady-state operation settling into the safe continuous zone at 1050W.
About 21.8 hours on AC power, with the 1/2 HP well pump averaging 70 W (standard 100-ft deep residential well cycling on 30/50 PSI pressure switch (1,050 W run, 3,200 W surge)). The EcoFlow DELTA 2 Max then draws about 94 W from its battery, including 15 W for the inverter itself. Best case: about 53 hours (shallow water table with low head pressure demand (850 W run, 2,500 W surge)). Worst case: about 6.9 hours (deep drawdown or continuous tank refill against high head pressure (1,250 W run, 3,800 W surge)).
Yes. The 1/2 HP well pump's start-up peak of about 3,200 W (up to 3,800 W) fits within the EcoFlow DELTA 2 Max's 4,800 W surge rating, with 21% headroom even in the worst case.
That simple division gives 29 hours, but the EcoFlow DELTA 2 Max's inverter draws about 15 W whenever its AC outlets are on. At this light load that's 16% of everything the battery supplies, and inverter conversion losses take a further share. EcoFlow doesn't publish an idle figure and we haven't found an independent measurement, so this uses our 15 W estimate.
On wall power: about 66 minutes to 80% and 80 minutes to full (EcoFlow figures). With its maximum 1,000 W of solar input connected, expect about 800 W in full sun, so a full recharge takes roughly 2.7 hours of full sun, so it can refill in a single day with 4 peak sun hours.
Statutory 30-day retail price announcements & rate revisions
Bord Gáis Energy winter rate adjustment: +1.60c/kWh Day, +0.90c/kWh Boost (2am–5am), and +€12.50/yr standing charge effective 20 Nov 2026.
Energia retail revision: +1.85c/kWh Day, +1.15c/kWh EV Boost (2am–6am), and +€14.20/yr standing charge effective 15 Nov 2026.
Dual Fuel Day Night: Day -4.64c/kWh, Night -3.25c/kWh (effective 2026-11-05)
Electricity Day Night: Day -4.64c/kWh, Night -3.25c/kWh (effective 2026-11-05)
SSE Airtricity statutory price cut: -1.25c/kWh Day, -0.65c/kWh Night, and -€8.40/yr standing charge effective 01 Oct 2026.
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