What size electrical panel do I need for my home?
Answer
Panel sizing should match calculated demand, future load plans, and safety margin. Common residential service sizes are 100A and 200A, but the right size depends on your specific electrical profile.
How panel sizing is determined
Panel sizing is based on load calculation, not home age alone.
- Current loads: HVAC, cooking, water heating, dryers, workshop equipment.
- Future loads: EV chargers, additions, electrification plans.
- Required dedicated circuits and available panel space.
Massachusetts context
Massachusetts panel and service upgrades must follow permit and inspection rules where applicable. Early planning helps avoid delays during renovation or equipment installation.
When to schedule panel sizing diagnostics
Book a sizing review before committing to major electrical purchases.
- You are adding EV charging or electric HVAC.
- Your panel is full or missing space for required circuits.
- You want one upgrade plan that supports long-term demand.
See Panels & Service for load-based panel sizing support.