Solar calculator for your EV and home
Find out how many solar panels you need to charge your car, and optionally run your home, plus what you'd save and when it pays for itself.
How we size the system
What you need each day
What panels make
Savings & payback
Get solar quotes for your home
Share a few details and a verified solar installer will survey your roof, check shading and your load, and quote a system sized for your home and your EV.
Frequently asked questions
How many solar panels do I need to charge an EV in Pakistan?
Driving 40 km a day uses roughly 7–8 kWh of electricity. In most of Pakistan one kW of panels produces around 4–5 kWh a day on average, so about 2 kWp of panels (four 550 W panels) covers typical daily charging. Southern regions generally produce more than the north.
Can I charge my car directly from solar panels?
Yes, if the car is plugged in during daylight — for example on work-from-home days or weekends. Otherwise you need net metering (export by day, import at night) or a battery system. Net-metering rules change, so check the latest policy from your DISCO and NEPRA.
Is the payback figure accurate?
It is a rough guide based only on EV charging savings at the grid price you enter. Real payback depends on actual generation, how much solar you self-consume, net-metering rates, tariff changes and system maintenance.
My charger is 7 kW. Why does it suggest only about 2 kW of panels?
Because kW is speed and units (kWh) are amount. Driving 40 km a day needs about 8 units. A 7 kW charger delivers that in a little over an hour, while 2 kW of panels make the same 8 units over a sunny day. With net metering, the grid covers the gap while the car charges fast and your panels pay it back during the day. To charge at full 7 kW from sunshine alone you'd need around 9 kW of panels — choose "Sunshine only, full speed" in the calculator.
Can I include my home's electricity use?
Yes. Choose "Car + my home" and enter the units from your electricity bill, or open "Calculate from appliances" and set how many fans, lights, ACs and other appliances you use. The calculator then sizes one system for both, and shows how much is for the car.
What is a "unit"?
One unit is one kilowatt-hour (kWh), the same unit your electricity bill uses. A 1,000 W appliance running for one hour uses one unit.
Does the calculator include batteries?
No. The system cost is for panels, inverter and installation at the cost per kW you enter. Adding a battery bank increases the cost significantly.