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Goal Zero Yeti PRO 4000 sizing guide
Goal Zero’s LiFePO4 flagship — 4 kWh, 3,600 W, whole-home with the transfer switch and tanks. Here's exactly what it runs, how long, and which outages it covers — computed, not marketed.
Fast AC; expandable to ~27 kWh · 104 lb · 120/240 V AC, USB-A/C · expandable with add-on batteries.
What the Yeti PRO 4000 runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~68 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~103 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~90 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~75 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~10 h |
| Space Heater (1500 W) | 1,500 W | yes | ~2.4 h |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~7.2 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | yes | ~4.7 h |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | yes | ~9.0 h |
| Microwave (1000 W cooking) | 1,200 W | yes | ~3.0 h |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~22 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | yes | ~17 h |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | yes | ~24 h |
Runtime uses each load's duty-weighted average draw against 90% of the rated capacity — conservative on purpose. Cyclic loads (fridges, pumps) run far longer than running-watts × capacity would suggest.
Outages the Yeti PRO 4000 covers
Common questions
What can the Goal Zero Yeti PRO 4000 run?
With 3,600 W of continuous output and a 7,200 W surge rating, the Goal Zero Yeti PRO 4000 runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, space heater (1500 w), and more. Its 3,993 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Goal Zero Yeti PRO 4000 run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Goal Zero Yeti PRO 4000's 3,993 Wh runs one for roughly 68 h before recharging.
Specs: Manufacturer published specifications (approximate; confirm on the current product page) (compiled 2026-06-15). Informational only — a computed sizing estimate from published appliance-wattage charts and manufacturer station specs. It is not an electrical guarantee. For hardwired or whole-home backup, transfer switches, or any permanent install, consult a licensed electrician.