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Goal Zero Yeti 1250 Runtime Calculator
Use this source-linked record to estimate runtime from tracked capacity, output, charging, and weight fields. Unknown specs stay unknown until an official or manufacturer-grade source confirms them.
Quick answer: the Goal Zero Yeti 1250 stores 1,200 Wh and delivers up to 1,200 W of continuous AC power. Under this site's planning assumptions (85% inverter efficiency, 10% reserve), a steady 100 W AC load runs for roughly 9.2 hours. Last source check: 2026-08-27. This is an estimate, not a guarantee.
Capacity1200 Wh
AC output1,200 W
Surge1,500 W
Chemistryunknown
ConfidenceEstimated
Source regionglobal/general
Checked2026-08-27
Swipe table sideways
| Battery capacity | 1200 Wh |
|---|---|
| Battery chemistry | unknown |
| AC output | 1,200 W |
| Surge output | 1,500 W |
| DC output | 400 W |
| USB-C output | unknown |
| Solar input | 320 W |
| Weight | 46.7 kg |
| Confidence | Estimated |
| Lifecycle status | Unknown |
| Source region | global/general |
| Last verified | 2026-08-27 |
Chemistry stays unknown in the schema because the published sealed lead-acid (AGM) pack is outside the lithium and sodium chemistries the catalog models. Solar input stores the 320W high-power charging ceiling; the 8mm port is limited to 160W. The unit has no USB-C port.
Runtime Starting Points
These are formula estimates using the tracked capacity, a 10% reserve, and each scenario's default wattage and duty cycle. They are planning starters, not measured runtimes.
Swipe table sideways
| Scenario | Default load | Estimate | Scenario confidence | Station page |
|---|---|---|---|---|
| Full-size refrigerator | 500 W at 33% | 5h 34m | Estimated | Use calculator |
| CPAP without heated humidifier | 40 W at 100% | 22h 57m | Estimated | Use calculator |
| Starlink Mini | 32 W at 100% | 1d 6h | Estimated | Use calculator |
| Wi-Fi router | 12 W at 100% | 3d 7h | Estimated | Use calculator |
| LED TV | 100 W at 100% | 9h 11m | Estimated | Use calculator |
Calculator for this station
Adjust watts, duty cycle, reserve, output path, and startup surge with Goal Zero Yeti 1250 prefilled from the source-linked specs above.
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Power station model
Battery capacity (Wh): 1200 WhContinuous output rating (W): 1200 WSurge output rating (W): 1500 W
Estimated runtime15h 18m9h 35m – 19h 0mEstimated runtime: 15h 18m, 9h 35m – 19h 0m
Output path
Estimated runtime
15h 18mEstimated runtime: 15h 18mThis setup has comfortable headroom for overnight use, assuming the wattage estimate is realistic.
Conservative9h 35m
Estimated15h 18m
Optimistic19h 0m
Conservative assumes harder conditions; optimistic assumes favorable conditions.
- This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior.
Show your work
Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.
- Rated battery
- 1200 Wh
- Usable energy
- 918 Wh
- 1200 Wh x 85% x 90% x 100% x 100%
- Running watts
- 60 W
- Average load
- 60 W
- Max surge
- n/a
- Fixed station overhead
- Unknown (not included)
- 60 W / 85% = 70.6 W battery draw; fixed overhead is unknown and excluded
- Estimated runtime
- 15h 18m
- 918 Wh / 60 W = 15h 18m
- Output path
- AC inverter
- Efficiency (%)
- 85
- Reserve kept unused (%)
- 10
- Battery health (%)
- 100
- Cold weather loss (%)
- 0
This link contains the numeric values you entered, but not custom load names.
Source-Backed Next Steps
Smallest matching record (8h)Jackery Explorer 600 Plus
WattRunTime.com
WattRunTime estimate
Estimated runtime
15h 18mThis setup has comfortable headroom for overnight use, assuming the wattage estimate is realistic.Usable energy918 Wh
Average load60 W
Fixed station overheadUnknown (not included)
Running watts60 W
Max surgen/a
Runtime range
Conservative9h 35m
Estimated15h 18m
Optimistic19h 0m
Show your work
Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.
Usable energy918 Wh1200 Wh x 85% x 90% x 100% x 100%
Fixed station overheadUnknown (not included)60 W / 85% = 70.6 W battery draw; fixed overhead is unknown and excluded
Estimated runtime15h 18m918 Wh / 60 W = 15h 18m
Assumptions
- 1200 Wh nominal battery capacity
- AC inverter output path
- 85% conversion efficiency
- 10% reserve kept unused
- 60 W average load from 1 load
- 100% battery health
- 0% temperature loss
- Fixed station overhead unknown; not included
Warnings
- This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior.
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Good fit when
- Capacity is in a mid-size planning class that can cover many overnight or essential-load scenarios when reserve and efficiency are included.
- Tracked AC output is 1,200 W, so high-draw appliances and tools need careful filtering.
- Tracked solar input is 320 W before panel, weather, angle, and controller losses.
Watch out for
- Surge output is tracked, but device startup behavior should still be checked against the actual load.
- Still unknown in the source-backed record: battery chemistry, usb-c output.
- Tracked weight is in a heavier class; plan where it will live before treating it as a grab-and-go station.
- Confidence is not marked verified; keep the linked source context visible before making a purchase or emergency plan.
Related Goal Zero Records
Nearby source-linked models from the same brand help you compare capacity, output, and unknown fields without leaving the data set.
Yeti 1000 Lithium
1,045 Wh, 1,500 W AC output, confidence: Estimated.
Yeti 1000 LiFePO4
998.4 Wh, 2,000 W AC output, confidence: Verified.
Yeti 1000X
997 Wh, 1,500 W AC output, confidence: Verified.
Sources
- Goal Zero Yeti 1250 official product page (official; checked 2026-08-27)