The practical answer
A panel upgrade is usually a last-mile infrastructure decision, not the first charger decision. If the home cannot safely support the desired circuit, the options are lower charging amperage, load management, schedule-based charging, or upgrading service. The best answer starts with daily mileage and panel load, not charger marketing.
Decision path
- Estimate how many miles you actually need to recover overnight.
- Compare 16A, 24A, 32A, 40A, and 48A charging before assuming max output is required.
- Ask whether a hardwired load-managed charger can fit the existing service.
- Upgrade the panel only when the home load and future plans justify it.
