What size generator to run a garbage disposal?
Garbage disposal sizing at a glance: it draws 500 running watts, surging to 1300W at startup.
| Spec | Value |
|---|---|
| Running watts | 500W |
| Starting (surge) watts | 1300W |
| Recommended class (this load + margin) | 2000W |
Why the startup surge matters
Because a garbage disposal has a motor, it surges to about 1300W at startup — roughly 2.6× its running draw. If you size a generator only for the running watts, it can stall the instant the garbage disposal switches on. Always size for the surge.
Sizing the whole system
The number above covers the garbage disposal on its own with a safety margin. In a real outage you'll run other things too — and the right method is your total running load plus the single largest surge among everything, not the sum of every surge. Use the full calculator to size your actual setup:
Common questions
How many watts does a garbage disposal use?
A typical garbage disposal draws about 500 running watts, but needs roughly 1300 watts at startup due to motor surge.
What size generator runs a garbage disposal?
For the garbage disposal alone plus a safety margin, a 2000W (≈2.0kW) class generator is appropriate. Add your other essential loads to size the full system.