Guides · Faisalabad, Lahore, Punjab
Charging an Electric Car or Bike With Home Solar
Short answer
Yes, home solar can charge an electric car or electric bike, and it works best when you charge during sunny hours, directly from the panels. The key is to match three numbers: the charger's power in kW, how much spare solar power your system has at midday, and how many kWh the vehicle needs each day. An e-bike needs only a small amount of energy and fits easily into most home solar systems. An electric car needs much more, so it usually means more panels, careful charge timing, or both.
This guide explains the arithmetic in plain language, with round illustrative numbers, so you can work out what your own system can do.
Why EV charging is now a solar question
Pakistan's Electric Vehicle Policy 2025-30, announced in June 2025, set a target for 30% of new vehicles to be electric by 2030 and included subsidised financing for electric bikes and rickshaws. Electric two-wheelers, rickshaws and a growing number of cars are now on Punjab's roads, and most of them are charged at home.
Charging adds a new, flexible load to the household. Because you can often choose when to charge, it is one of the easiest loads to move into solar hours, which matters a lot under net billing.
Charging an EV on solar
Daytime charging
Uses your own solar units
Charger
Rating suits your connection
Car
On-board charger sets the speed
Three numbers you need
| Number | Unit | Where to find it |
|---|---|---|
| Vehicle battery size | kWh | Vehicle brochure or manual |
| Charger power | kW | Label on the charger or wall box |
| Daily driving energy | kWh per day | Your daily distance, times the vehicle's energy use per km |
If kW and kWh are confusing, read kW vs kWh explained simply. In short, kW is how fast the charger pulls power; kWh is how much energy ends up in the battery.
Most people do not empty the battery every day. What matters is the energy you use daily, not the full battery size.
Electric bikes and scooters: the easy case
Electric two-wheelers usually charge from an ordinary socket with a small portable charger. Their batteries are small compared with a car's.
Example arithmetic only, with round illustrative numbers. If an e-bike has a 2 kWh battery and you use about half of it each day:
- energy needed per day: about 1 kWh, plus a little for charging losses;
- the charger draws well under 1 kW;
- so a few hours of charging in the middle of the day uses a small slice of a typical home system's midday output.
For most homes with a 6 kW or larger system, a daily e-bike charge at midday fits comfortably alongside fans, a fridge and other daytime loads. The main point is timing: charge around midday, not at night from the grid.
Electric cars: the bigger case
Cars have much larger batteries, and home wall chargers draw far more power. A single-phase home wall charger is commonly rated around 7 kW; three-phase chargers are rated higher, though many cars accept only part of that on AC. A car can also be charged slowly from a suitable socket with a portable charger at a few kW.
Example arithmetic only, with round illustrative numbers. Say you drive 40 km a day and your car uses about 0.15 kWh per km:
- daily energy: 40 × 0.15 = 6 kWh, plus charging losses, so call it about 7 kWh;
- with a 7 kW charger, that takes about 1 hour at full power;
- with a slower 3 kW charge, it takes a little over 2 hours.
Now compare that with solar. How many units a system produces depends on its size, the season and the roof; our guide to units per kW in Punjab explains how to estimate it. The question is whether, at the hour you charge, your panels produce enough spare power above what the house is already using.
Charger power vs solar output: the real constraint
This is where most people go wrong. A 7 kW charger pulls about 7 kW the moment it starts. If your panels are producing 6 kW at noon and the house is already using 3 kW for ACs and a water motor, only about 3 kW is spare. The other 4 kW comes from the grid, or from the battery.
| Situation | What happens |
|---|---|
| Spare solar is more than charger power | Charging runs fully on solar; any extra exports or charges the battery |
| Spare solar is less than charger power | The shortfall is drawn from the grid (or battery) |
| Charging at night | All the energy comes from the grid or the home battery |
Ways to close the gap:
- Charge slower. Many wall chargers and cars let you set a lower charging current, so the charge matches the spare solar.
- Charge at the sunniest time. Late morning to mid-afternoon gives the most output. See solar load management for how to plan the day.
- Stagger heavy loads. Avoid charging while the water motor, iron and ACs are all running.
- Use a solar-aware charger. Some chargers can adjust their current to follow spare solar output, when connected to suitable monitoring. Compatibility depends on the inverter and charger.
Should you charge the car from a home battery?
You can, but it is rarely the best use of a home battery. Using the earlier example, a 7 kWh daily car charge could take most of a mid-sized home battery, leaving little for evening lights, fans and load-shedding. Charging the car from the battery and then recharging the battery from solar also adds conversion losses.
The more sensible order is:
- charge the vehicle directly from solar during the day;
- keep the home battery for evening loads and load-shedding;
- size any extra battery only after the daytime charging pattern is clear.
Our solar battery size calculator shows how to size a battery for the loads that really need it.
Sizing your solar system for an EV
If you already have solar, start by watching your monitoring app for a week to see how much spare power you have at midday. If you are planning a new system, add the vehicle's daily kWh to your daytime load when sizing.
Under net billing, every unit you use yourself saves a full-tariff grid unit, while exported units earn much less, reported at about Rs 10-11 per unit when the rules were notified. A vehicle that charges at midday turns surplus solar into self-use, which is exactly what good design aims for. Read sizing your solar system under net billing and our net metering and net billing guide.
Points an engineer will also check:
- Phase. A three-phase car charger needs a three-phase supply, and the inverter's phase must suit your connection. See three-phase vs single-phase inverters.
- Sanctioned load. A wall charger is a large new load. You may need to increase your sanctioned load.
- Protection. The charger needs its own correctly rated circuit, breaker and residual current protection. See breakers and protection.
- Parking and shade. A solar carport can add panel space over the parking area while shading the vehicle.
For complete system costs, see solar system price in Pakistan, or use the solar calculator for a first estimate.
What Solar Works Pakistan can do
Our in-house engineers design solar and battery systems around your real loads, from about 6 kW to megawatt scale, and our own teams install them. We can include your expected vehicle charging in the load analysis so the panels, inverter and battery are sized for it.
We also supply and install EV chargers, with or without solar, and can set them up to charge your car from your panels during the day. See our EV charger installation service.
Get today's price or a free site survey
Send us 12 months of bills, your vehicle model and how far you drive each day.
- WhatsApp or call: 0336 666 4321
- Email: info@solarworks.pk
- Head office: Main Boulevard, Sargodha Rd, Block F FDA City, Faisalabad
- Lahore branch: 2nd Floor, Jeff Heights, Gulberg, Lahore
- Hours: 9:00 AM to 6:00 PM daily
We serve customers throughout Punjab. See our Faisalabad and Lahore pages, or contact us.
Frequently asked questions
Can I charge an electric car with solar panels at home?
Yes, especially during sunny hours when your panels produce more than the house uses. If the charger draws more than the spare solar, the rest comes from the grid or battery, so many owners charge at a lower rate around midday.
How many solar panels do I need to charge an electric car?
It depends on how far you drive, not the full battery size. Work out your daily kWh from distance and the car's energy use per km, then add that to your daytime load when sizing the system. An engineer can turn that into a panel count for your roof.
Can I charge an electric bike from my home solar system?
Usually, yes. E-bike batteries and chargers are small, so a midday charge fits comfortably within most home systems of 6 kW or more.
Should I charge my EV from my home battery at night?
It is possible, but it uses up energy you may need for evening loads and load-shedding. Charging directly from solar in the day is usually the better choice.
Do I need a three-phase connection for EV charging?
Not for slower single-phase charging. A three-phase charger needs a three-phase supply, and a large charger may also require a higher sanctioned load.
Does charging an EV from solar make sense under net billing?
Yes, it often helps. Units used to charge the vehicle at midday are worth your full tariff, whereas exporting the same units earns a much lower credit.
Sources
- Arab News, "Pakistan unveils new EV policy with over $353 million in subsidies for electric bikes, rickshaws" (June 2025)
- Smart Home Charge, "How long does it take to charge an electric car?" (common home charger power levels)