Calc‑WorldFast online calculators
DEEN
Calculator

Solar EV Charging Calculator

Estimate how much EV charging energy can come from PV surplus. The calculator derives usable solar charging from mileage, EV consumption, PV yield, household demand and charging pattern; English mode can use miles and mi/kWh or metric inputs.

Energy
Inputs

Calculate now

The solar EV charging result separates how much charging energy can come from PV surplus and how much still comes from grid or public charging.

Display currencyChoose the currency symbol for entered amounts and results. No exchange-rate conversion is applied.
UnitsMetric units are the international default. Switch to US or UK units for distance, consumption and energy or fuel price when your comparison uses them.
km
Estimate this from your driving pattern in the displayed unit. US/UK mode uses miles; metric mode uses kilometers.
kWh/100 km
Use a realistic value including charging losses. US/UK mode displays mi/kWh; metric mode displays kWh/100 km.
Estimate how much of your charging happens at home rather than publicly or at work.
Choose how often the car can typically charge at home while PV is producing. The calculator estimates how much solar surplus can realistically be used for EV charging.
If unknown: PV size in kWp × roughly 900–1,000 kWh/kWp/year as a first estimate.
Household use is considered first. Only PV surplus can be available for EV charging in this model.
Optional: the battery first reduces household grid import, so less PV surplus may remain directly for the car.
This covers household battery charge and discharge losses. 90% means that 1 kWh of PV surplus returns as about 0.9 kWh of usable electricity later.
Explicitly chooses whether the model allocates PV surplus first to remaining household demand through the battery or to an available EV charging window.
Use your local grid price. Time-of-use prices, demand charges and taxes are simplified; no exchange-rate conversion is applied.
Use the local export credit, net-metering value or feed-in tariff that applies to your bill. Export caps and dynamic tariffs are not modelled automatically.
FAQ

FAQ about Solar EV Charging Calculator

Can I charge my EV fully from solar?

In annual terms this is only likely if enough PV surplus is available and the car often charges at home during production hours.

Why does the calculator not ask for the solar share of charging?

Because that share is usually the result. The calculator estimates it from mileage, consumption, PV yield, household demand and charging pattern.

What is annual solar charging advantage?

It roughly estimates the value of using PV electricity in the car instead of grid electricity. Simplified: grid price minus feed-in tariff.

Is public charging included?

Charging not done at home is shown as external or public charging.

Does this replace home-charger planning?

No. Charging power, control, tariff, charger hardware and vehicle behavior must be checked separately.