≈ 5.1 days (24h/day) · Safe motor start buffer (99.8% margin).
Wi-Fi router running (18 W max) and start-up (25 W max) draw fit the Goal Zero Yeti PRO 4000's 3,600 W continuous / 7,200 W surge ratings.
standalone dual-band Wi-Fi 6 router (6 W)
Wi-Fi 6 router plus fiber ONT or cable modem (10 W)
tri-band router plus DOCSIS 3.1 cable modem under heavy load (18 W)
Via 12 V DC car-socket to 5.5×2.1 mm (DC5521) barrel cable
Via 12 V DC car-socket to 5.5×2.1 mm (DC5521) barrel cable
Via 12 V DC car-socket to 5.5×2.1 mm (DC5521) barrel cable
≈ 5.1 days (24h/day)
System standby power: 22W (67.1% 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 1.5× starting surge (motor inrush) (99.8% worst-case surge margin).
Wall AC fast charge at up to 1800W (120m to 80%, 150m to 100%).
Safe envelope verified: Starting surge (15W) remains comfortably below the 7200W surge trip line, with steady-state operation settling into the safe continuous zone at 10W.
About 5.1 days on AC power, with the Wi-Fi router averaging 10 W (Wi-Fi 6 router plus fiber ONT or cable modem (10 W)). The Goal Zero Yeti PRO 4000 then draws about 33 W from its battery, including 22 W for the inverter itself. Best case: about 5.8 days (standalone dual-band Wi-Fi 6 router (6 W)). Worst case: about 4 days (tri-band router plus DOCSIS 3.1 cable modem under heavy load (18 W)).
Yes. Using the 12 V DC car-socket to 5.5×2.1 mm (DC5521) barrel cable on the Goal Zero Yeti PRO 4000's 12 V car socket, the Wi-Fi router runs about 17 days instead of 5.1 days on AC, 236% longer, because it skips the inverter's conversion loss and its 22 W idle draw.
That simple division gives 16.6 days, but the Goal Zero Yeti PRO 4000's inverter draws about 22 W whenever its AC outlets are on. At this light load that's 67% of everything the battery supplies, and inverter conversion losses take a further share. The idle figure comes from Goal Zero.
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.
It can act as a backup supply: with the Wi-Fi router plugged into the Goal Zero Yeti PRO 4000 and the Goal Zero Yeti PRO 4000 plugged into the wall, it switches the Wi-Fi router to battery in about 10 ms when the grid fails (Goal Zero calls this UPS mode).
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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