Goal Zero YETI PRO 4000 US: Output, APS, and Solar
Read the US YETI PRO 4000's shared outlet limits, solar inputs, expansion, and non-zero APS switching boundary.
Goal Zero’s US product page identifies the YETI PRO 4000 as SKU 37500, a 120 V station with 3,993.6 Wh of LiFePO4 storage. Its product page and 120 V Revision I guide describe related fields, but the guide is the key source for Automatic Power Switching (APS), medical-use limits, solar voltage ranges, and shared outputs. Confirm the nameplate and current guide revision for the unit in front of you.
Published capability and shared limits
| Field | Published value | How to read it |
|---|---|---|
| Nominal battery capacity | 3,993.6 Wh | Stored energy; usable energy under a specific load is not established |
| AC output | 3,600 W continuous; 7,200 W surge | 120 V US model; surge is not a motor-start guarantee |
| AC outlets | Four AC outlets and a 30 A / 120 V TT-30R | AC ports share their stated total-output limit |
| High-voltage solar | Up to 3,000 W; 12–145 V, up to 40 A | HPP input; panel and combiner limits apply |
| Low-voltage solar | Up to 275 W; 12.3–28 V, up to 10 A | Separate 8 mm input |
| AC charging | Up to 1,800 W; guide has a 400 W low setting | Lower setting is described for a shared household circuit |
| Expansion | Up to four Tank PRO 4000 batteries; up to 20 kWh stated | Accessory configuration; not the base unit’s usable output energy |
The product page lists 12 V outputs, including a 405 W high-power port and a 162 W car port. The guide says all 12 V outputs share a 30 A maximum. Do not add the port labels together as though every output could reach its maximum simultaneously. Confirm the current output table and the intended cable or vehicle integration equipment.
APS is not zero-millisecond switching
The guide says APS passes AC input through while grid power is present and switches to battery when input is interrupted. It specifies switching in under 15 ms and explicitly says the YETI PRO 4000 does not support 0 ms switching, so sensitive loads may be interrupted. Goal Zero also says the product is not a certified UPS or tested to hospital-grade or medical-equipment standards, and it warns against use with life-saving medical equipment. Treat that as a firm model-specific boundary.
The product page’s home and vehicle integration references do not change that transfer boundary. They also do not provide household wiring instructions or establish code compliance, grid isolation, or suitability for a particular circuit. Any fixed integration needs current product instructions and qualified local assessment.
Solar and charging checks
The product page’s 3,000 W high-voltage solar headline has a specific guide window. The guide allows up to 145 V and 40 A at the HPP input. The lower-power input has its own 12.3–28 V and 10 A limits. The guide includes panel and combiner arrangements, including a described mixed-panel configuration, but those are exact guide procedures rather than a general approval for any panel combination. Check panel open-circuit voltage, current, connector, and the required combiner before connecting an array.
AC charging may be reduced to 400 W when other loads share a household circuit, according to the guide. This describes a charge setting, not available station output. The manual also describes a 400 W alternator charger and vehicle battery protection, but a product page does not establish fit or safe installation in a particular vehicle.
Recall link applies to another model
Goal Zero’s current product page links to a voluntary YETI 3000X recall and firmware update. The linked notice identifies the affected model as the 120 V YETI 3000X, SKU 36400, and does not identify the YETI PRO 4000 SKU 37500. That notice is not evidence that a PRO 4000 is recalled. If you own any Goal Zero unit and are unsure of its model, verify the nameplate and check the current manufacturer notice before use.
For the YETI PRO 4000 itself, check the current guide, firmware, and accessory compatibility for your exact SKU. The UPS guide explains why a transfer number alone does not prove device continuity; the solar guide explains the electrical checks behind an input-wattage label.