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Goal Zero Yeti 1000 Core sizing guide
A 1 kWh / 1,200 W unit for outage essentials at a friendlier price. Here's exactly what it runs, how long, and which outages it covers — computed, not marketed.
~9 h AC; up to 600 W solar · 32 lb · 2× AC, USB-A/C, car.
What the Yeti 1000 Core runs — and for how long
| Appliance | Running | Runs it? | Approx. runtime |
|---|---|---|---|
| Refrigerator (modern) | 150 W (1,200 W surge) | yes | ~17 h |
| Chest Freezer | 100 W (1,000 W surge) | yes | ~25 h |
| CPAP Machine (no humidifier) | 40 W | yes | ~22 h |
| CPAP with Heated Humidifier | 60 W (95 W surge) | yes | ~18 h |
| Oxygen Concentrator | 350 W (600 W surge) | yes | ~2.5 h |
| Space Heater (1500 W) | 1,500 W | too much | — |
| Window AC (8,000 BTU) | 715 W (1,250 W surge) | yes | ~1.8 h |
| Window AC (12,000 BTU) | 1,100 W (1,800 W surge) | yes | ~1.1 h |
| Gas Furnace Blower (1/2 HP) | 800 W (2,350 W surge) | yes | ~2.2 h |
| Microwave (1000 W cooking) | 1,200 W | yes | ~0.7 h |
| Sump Pump (1/3 HP) | 800 W (1,500 W surge) | yes | ~5.5 h |
| Sump Pump (1/2 HP) | 1,050 W (2,150 W surge) | yes | ~4.2 h |
| Well Pump (1/2 HP) | 1,000 W (2,100 W surge) | yes | ~5.9 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 1000 Core covers
Common questions
What can the Goal Zero Yeti 1000 Core run?
With 1,200 W of continuous output and a 2,400 W surge rating, the Goal Zero Yeti 1000 Core runs refrigerator (modern), chest freezer, cpap machine (no humidifier), cpap with heated humidifier, oxygen concentrator, window ac (8,000 btu), and more. Its 983 Wh battery sets how long: a fridge for roughly a day, a CPAP for several nights.
How long will the Goal Zero Yeti 1000 Core run a refrigerator?
A modern refrigerator averages about 53 W (it cycles ~35% of the time), so the Goal Zero Yeti 1000 Core's 983 Wh runs one for roughly 17 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.