≈ 0.8 days (24h/day) · Safe motor start buffer (68.1% margin).
1/2 HP sump running (1,150 W max) and start-up (2,700 W max) draw fit the Goal Zero Yeti PRO 4000's 3,600 W continuous / 7,200 W surge ratings.
light rain: 4 cycles/h × 18 s at 800 W (16 W avg)
active storm: 15 cycles/h × 36 s at 1,050 W (158 W avg)
severe flooding: 24 cycles/h × 45 s at 1,150 W (345 W avg)
≈ 0.8 days (24h/day)
System standby power: 22W (11.2% of total draw)
Provides 4× CEE 7/3 (230V), 1× IEC Commando (32A) (120V 60Hz).
Pure sine wave inverter output. Safe for all standard household appliances.
Inductive motor/compressor load with 2.2× starting surge (motor inrush) (68.1% worst-case surge margin).
Wall AC fast charge at up to 1800W (120m to 80%, 150m to 100%).
Safe envelope verified: Starting surge (2300W) remains comfortably below the 7200W surge trip line, with steady-state operation settling into the safe continuous zone at 1050W.
About 20.3 hours on AC power, with the 1/2 HP sump averaging 158 W (active storm: 15 cycles/h × 36 s at 1,050 W (158 W avg)). The Goal Zero Yeti PRO 4000 then draws about 197 W from its battery, including 22 W for the inverter itself. Best case: about 4.2 days (light rain: 4 cycles/h × 18 s at 800 W (16 W avg)). Worst case: about 9.8 hours (severe flooding: 24 cycles/h × 45 s at 1,150 W (345 W avg)).
Yes. The 1/2 HP sump's start-up peak of about 2,300 W (up to 2,700 W) fits within the Goal Zero Yeti PRO 4000's 7,200 W surge rating, with 63% headroom even in the worst case.
On wall power: about 120 minutes to 80% and 150 minutes to full (Goal Zero figures). With its maximum 3,000 W of solar input connected, expect about 2,400 W in full sun, so a full recharge takes roughly 1.8 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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