The practical answer
Panel capacity is not just the number printed on the main breaker. The real question is whether the home has enough spare load after major appliances, HVAC, and existing circuits are considered. A licensed electrician can calculate this properly, and a load-managed charger can sometimes avoid a costly panel upgrade.
Decision path
- Find your main service size, but treat it as an early clue, not the final answer.
- List major electric loads such as HVAC, dryer, range, water heater, pool equipment, and existing subpanels.
- Decide whether your driving pattern needs 48 amps, or whether 24 to 32 amps would cover daily miles.
- Ask about load management before assuming a panel upgrade is the only path.