Goal Zero Yeti PRO 4000: Runtime & Specs
By Hicham M. · Specs from Goal Zero's published documents, as of September 2026 · How we calculate
The Goal Zero Yeti PRO 4000 is a 3,994 Wh LiFePO4 power station with 3,600 W of continuous AC output and a 7,200 W surge rating. It runs a typical full-size fridge for about 2.4 days.
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Simulated runtimes (not measured)
Nobody tested this unit for this page. These figures come from a computer simulation of the Yeti PRO 4000, and they are estimates. The plain runtime table below divides energy by average draw at 85% efficiency. The simulation also charges the battery for the power the inverter burns just by being switched on, which is why small loads come out shorter. Where we have measured a unit, the measurement is shown separately and labeled as measured.
| Device | Spec-sheet math | Simulated, typical | Likely range | Simulated at 0 °C |
|---|---|---|---|---|
| Wi-Fi router + modem | 9.4 days | 3.6 days | 2.8 days to 4.4 days | 3 days |
| CPAP (no humidifier) | 4.7 days | 2.6 days | 2.2 days to 3.1 days | 2.2 days |
| Starlink Standard | 38 hours | 30 hours | 28 hours to 32 hours | 25 hours |
| Refrigerator (full-size, ENERGY STAR) | 2.4 days | 41 hours | 37 hours to 46 hours | 35 hours |
Nonstop runtime from full to battery cutoff. Likely range = middle 80% of 200 simulated runs with the uncertain inputs varied. The inverter idle draw is assumed, not published: we assumed about 30 W for this model, varied from 18 to 44 W. If the real figure is lower, real runtimes land closer to the spec-sheet column.
How this was simulated
- The battery is stepped down every 2 minutes until it reaches cutoff, for 200 runs per device. Results are seeded, so the page shows the same numbers on every build.
- Battery draw = load + inverter idle draw + 4–8% of the load + a loss that rises with load squared (4% at full output).
- Usable capacity = 92–98% of rated Wh, for protection cutoff and aging.
- At 0 °C, 80–90% of that capacity is assumed available.
- Fridges cycle on and off every 30–50 minutes at the share of the time set by their average draw. The inverter idle draw continues while the compressor is off.
- Devices that exceed this model's output or surge rating are left out. Loads are US 120 V devices.
These ranges are assumptions about a typical unit. They are not manufacturer figures for the Goal Zero Yeti PRO 4000. How we calculate · How we use AI
How long will the Yeti PRO 4000 run your appliances?
Nonstop runtime for one device at a time, using typical US wattages and 85% inverter efficiency. Devices marked ✕ can't run on this model.
| Device | Avg draw | Runtime | Bar |
|---|---|---|---|
| LED light bulb | 9 W | 15.7 days | |
| Phone charging | 10 W | 15 days | |
| Wi-Fi router + modem | 15 W | 9.4 days | |
| Laptop | 50 W | 2.8 days | |
| CPAP (no humidifier) | 30 W | 4.7 days | |
| CPAP with heated humidifier | 60 W | 2.4 days | |
| Starlink Standard | 90 W | 38 hours | |
| TV | 100 W | 34 hours | |
| Mini fridge | 29 W | 4.9 days | |
| Refrigerator | 58 W | 2.4 days | |
| Chest freezer | 29 W | 4.9 days | |
| Sump pump (1/3 HP) | 160 W | 21 hours | |
| Sump pump (1/2 HP) | 210 W | 16 hours | |
| Window AC | 225 W | 15 hours | |
| Drip coffee maker | 1,000 W | 3.4 hours | |
| Microwave | 1,500 W | 2.3 hours | |
| Space heater | 750 W | 4.5 hours | |
| Well pump | 33 W | Needs 240 V |
Fridges, freezers, pumps and AC units cycle on and off, so we use their average draw. Want a mix of devices on a schedule? Use the runtime calculator.
What the Yeti PRO 4000 can't power
- Well pump (1/2 HP submersible): needs 240 V
Solar charging time
Hours of good sun to charge from empty, assuming panels deliver 75% of their rating.
| Panels | Power in | Hours of sun |
|---|---|---|
| 100 W of panels | 75 W | 53 hours |
| 200 W of panels | 150 W | 27 hours |
| 400 W of panels | 300 W | 13 hours |
| 3,000 W of panels | 2,250 W | 1.8 hours |
Check panel voltage and wiring with the solar charging calculator.
Full specifications
| Battery capacity | 3,994 Wh |
|---|---|
| Amp-hours at 12 V (converted) How we convert | 333 Ah (312 Ah at 12.8 V) |
| Battery chemistry LFP vs NMC | LiFePO4 (LFP) |
| Continuous AC output | 3,600 W |
| Surge (peak) output | 7,200 W |
| Boost mode | None listed |
| AC voltage | 120V |
| AC outlets | 5 |
| USB-C ports | 3 (up to 100 W) |
| USB-A ports | 3 |
| 12 V car outlet | Yes |
| Max solar input | 3,000 W |
| Solar voltage range | 13.3–150 V |
| Solar max current | 30 A |
| Max AC charging power | 1,800 W |
| AC charging time (maker claim) | 0–80% in 2 hr; 0–100% in under 3 hr |
| Expandable | Yes, up to 19,968 Wh |
| UPS / EPS switchover What this means | 15 ms |
| Cycle life What this means | 4,000 cycles (to 80%) |
| Weight | 115.7 lb |
| Warranty | 5 years |
Notes: 4×20A + 1×TT-30R. APS <15 ms (guide). HPP 30A on product page, 40A in guide; +8mm 275W. Max = 5×3993.6 Wh (+4 Tank PRO 4000; GZ says 'up to 20 kWh'). Cycles to 80%.
Specs from Goal Zero's published documents, as of September 2026. Found an error? Tell us.
Sources
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