EV units calculator
How many units will your EV use?
Three numbers from the spec sheet and one from your life. We take 20% off the claimed range — real roads aren't the brochure — and show every step, so you can check it.
Works for any EV — scooter, bike or car. The petrol line is only for comparison; change the price and mileage to match your current vehicle.
Why take 20% off the claimed range?
Claimed ranges come from a test cycle, not a Wayanad road. Hills, a pillion, the monsoon and age all eat into it. Twenty percent is a fair everyday haircut — some riders see less, some more.
Why add 10% for charging?
What the wall supplies is more than what the battery holds — the charger and the battery both warm up a little, and that heat is units you paid for. Around 10% is typical for home AC charging.
Will an EV push my bill over the 250-unit line?
It can, and that matters more than the units themselves: above 250 units a month KSEB re-prices every unit on the bill. A scooter rarely tips a home over; a car doing a thousand kilometres a month often does. Add the figure to the solar calculator and you'll see where it lands you.
Can a 3 kW roof charge a car?
Comfortably, for most driving. A 3 kW makes about 365 units a month; a car doing 1,000 km needs around 140. The question is usually whether the rest of the house still fits under the roof as well — which is exactly what the solar calculator works out.
Now put it against your bill.
The solar calculator takes this figure, adds it to what you use today, and shows the size that covers both — and the moment the EV pushes you past the 250-unit line.
Open the solar calculator