Do You Need an Electrical Panel Upgrade for a Heat Pump?

Heat pumps require significant electrical capacity, and many older homes weren't designed to support them. Understanding electrical requirements helps you plan your heat pump installation.

Heat Pump Electrical Requirements

Typical Circuit Needs:

Most heat pumps: 30-60 amp dedicated circuit

Larger systems: Up to 100 amps

Backup heat strips: Additional 20-60 amps

Total Home Impact:

Heat pumps can add 40-100+ amps to your electrical load, which may exceed older panel capacity.

Signs You May Need an Upgrade

Panel Capacity Issues:

Existing panel is 100 amps or less

Limited available circuit spaces

Already using high-load appliances

Panel Age/Condition:

Panel is 30+ years old

Evidence of corrosion or damage

Outdated brands (Federal Pacific, Zinsco)

Inadequate labeling

The Upgrade Process

Assessment:

Electrician evaluates:

Current panel capacity

Existing loads

Heat pump requirements

Future needs (EV charger, etc.)

Typical Upgrades:

100 amp to 200 amp: Most common

200 amp to 400 amp: Large homes with high loads

Cost: $1,500-$4,000+

Permit Requirements:

Electrical upgrades require permits and inspections. Professional installation essential.

Bay Area Considerations

Older Housing Stock:

Many Bay Area homes have 100-amp panels that need upgrading for heat pumps.

PG&E Requirements:

May need service upgrade from utility, which can add time and complexity.

Future Planning:

Consider additional capacity for EV charging and other electrification when upgrading.

Plan electrical requirements early in your heat pump project to avoid delays and unexpected costs.