Choosing the right generator size is one of the most common questions we get at Carolina Power Technologies. Too small and you risk overloading your system. Too large and you’re paying for capacity you’ll never use.
The Basics of Load Calculation
Every generator sizing project starts with a load calculation — an inventory of every electrical circuit you want backed up and its wattage demand. Essential loads typically include your HVAC system, refrigerator, sump pump, lighting, and a few outlets for electronics.
Common Generator Size Ranges
- 10–14kW: Smaller homes, essential circuits only
- 16–22kW: Most 2,000–3,500 sq ft homes, whole-home coverage
- 30–48kW: Large homes, home offices, multi-zone HVAC
- 60kW+: Small commercial, large estates
The best way to get a precise recommendation is to schedule a free on-site load assessment with one of our certified technicians — or try our Generator Concierge Tool for an instant estimate.