Solar EV Charging: Free Fuel From Your Roof

Solar EV charging integration has gotten complicated with all the system sizing, battery storage, and optimization options flying around. As someone who charges my EV primarily from solar, I learned everything there is to know about making these systems work together. Today, I will share it all with you.

The Basic Appeal

Probably should have led with this section, honestly—solar plus EV creates compelling economics. Once panels are paid off (typically 7-10 years), your fuel costs drop to essentially zero.

That’s what makes solar charging endearing to us long-term planners—the math only improves over time as electricity rates rise.

Integration Options

• Direct solar: Charge during peak production hours (daytime)
• Net metering: Send excess solar to grid, draw back at night for charging
• Battery storage: Store daytime production, charge overnight

Northwest Considerations

Pacific Northwest solar is viable despite cloudy reputation—especially east of Cascades. Winter production drops significantly, so grid backup remains necessary. Size systems for annual production goals, not daily needs.

Getting Started

If considering solar specifically for EV charging, factor EV consumption into system sizing. Typical EV adds 200-400 kWh monthly depending on driving. Plan for that capacity plus normal household use.