Generac Generator Installation & Service
Howell, NJ.

Sizing a Howell generator from the panel up

A standby unit is sized from a load calculation, not from square footage. The calculation lists what the house actually runs during an outage: heat, refrigeration, a sump pump if there is one, air conditioning, cooking, and anything added later. When the total climbs past a unit's rating, automatic load management can hold the less important circuits until there is room, which often costs less than moving up a size.

A private well adds the pump to that list, and a pump motor draws far more current in the moment it starts than while it runs. That starting surge belongs in the numbers. The free on-site assessment comes with a written load calculation, so the pump, the charger, and everything else are on paper before any equipment is chosen.