Phase 1
How Solar and EV Charging Work Together
A solar array generates power during daylight hours, and a Level 2 home charger pulls a steady, fairly high draw whenever your car is plugged in. Without storage, the cleanest way to connect the two is timing: scheduling your charger to run while your panels are producing, typically midday, rather than overnight when your system relies entirely on the grid.
Most modern chargers, including the ChargePoint Home Flex and Tesla Wall Connector, support app-based scheduling, so you can set charging to start when solar production is highest. Adding a battery, such as a Tesla Powerwall or an Enphase battery system, extends that further by storing daytime solar output for an overnight charge.
Phase 2
Sizing a System for Solar-Powered Charging
How much solar you need depends on your driving habits, not just your home’s regular electricity use. A typical EV uses roughly 3 to 4 miles of range per kWh, so a driver covering 30 to 40 miles a day is adding somewhere around 10 kWh of daily demand. Most Western Washington homes pairing solar with an EV charger land in the 6 kW to 8 kW system range once existing household use is factored in, though your actual number depends on your roof, your usage, and your utility’s rate structure.
Phase 3
Should You Add a Battery?
A battery is not required to charge an EV with solar. It solves a specific problem: charging overnight on stored solar power instead of grid power. If your daily driving fits inside a midday or early-evening charging window, panels alone can cover most of it. If you charge overnight out of habit or your utility’s rate structure makes off-peak charging expensive, a battery closes that gap.
Systems like the Tesla Powerwall and Enphase battery storage also provide backup power during outages, which is a separate benefit worth weighing on its own, independent of EV charging.
Phase 4
Planning Solar and a Charger Together
Homeowners who plan both at once avoid redoing electrical work later. We size the solar array with EV charging in mind, place the charger circuit to work with your panel layout, and handle permitting and utility coordination for the whole project as one job.
Related Resources
Common Questions
Can I charge my EV with solar panels?
Yes. Solar panels generate power during the day, and scheduling your charger to run during those hours lets your EV draw directly on solar production. Adding a battery extends that to overnight charging.
Do I need a battery to charge my EV with solar?
No. A battery is optional. If you can charge during daylight hours, panels alone can cover most of your driving. A battery mainly helps with overnight charging and outage backup.
How big of a solar system do I need to charge an EV?
It depends on your daily driving distance and existing household electricity use. Most homes pairing solar with EV charging in this region land around 6 kW to 8 kW, though your exact number depends on your roof and usage.
Can I add solar later if I already have an EV charger?
Yes, though planning both together avoids extra electrical work. If you already have a charger, we design the solar system around your existing setup rather than requiring changes to it.
Will solar cover 100% of my EV charging?
It can, depending on system size, your driving habits, and whether you add a battery. We size your system based on your actual usage rather than a generic estimate. See Energy Solutions →
Ready to Pair Solar With Your EV Charger?
We design solar, battery, and EV charging as one system, sized around how you actually drive.
