Generac — Determine what size generator you need

Operation · generator sizing

From a Generac manual covering: GP15000, GP17500, GP1800, GP3250, GP5000, GP5500, GP6500, GP6500E, GP7500. Check it applies to your exact model before use.

Applies to: Generac GP15000, Generac GP17500, Generac GP1800, Generac GP3250, Generac GP5000, Generac GP5500, Generac GP6500, Generac GP6500E, Generac GP7500

Procedure

1. Choose which devices you want to power at the same time.
2. Record and add the running watts listed for each device that you need to power.
3. Record the starting watt requirements for each device.
4. Add the starting watts for the highest starting watt device plus the total running watts to determine the total watts requirements.
5. Consult the specifications to find the correct generator for your needs.

Full service-parts list: Generac GP15000 →, Generac GP17500 →, Generac GP1800 →, Generac GP3250 →, Generac GP5000 →, Generac GP5500 →, Generac GP6500 →, Generac GP6500E →

Source: Generac manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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