V2G Revenue & Energy Flow Estimator
What would selling power back from your car actually earn? After what the charging cost you, and after what it takes out of the battery — the two things almost every V2G calculator leaves out.
Your car
The usable figure, not the gross one
kWh
Leave enough to drive on — see the depth limit in Advanced
kWh
Advanced / Custom Input — the vehicle
The tool caps your export at this share of the battery.
%
Decides how long each export session takes.
kW
You lose some of every unit that goes in and comes back out.
%
What you are paid, and what you pay
Filled in from your country — use your programme’s real rate
/kWh
Your cheapest overnight rate
/kWh
Advanced / Custom Input — the programme
Some programmes charge a monthly subscription. 0 if yours does not.
/month
Some programmes pay just for being plugged in and available.
/month
How often would you do it?
nos
Advanced / Custom Input — the pattern
Allow for holidays and any months the programme is not running.
weeks
After any grant. Typical range is a good deal more than a normal charger.
Taken straight off the hardware cost.
What it costs the battery
This is the part most calculators skip, and it is usually the difference between a profit and a loss.
LFP lasts roughly three times as many cycles as NMC
Filled in from the chemistry and battery size
cycles
Advanced / Custom Input — the wear model
Per kWh moved. Overrides the pack figures above. 0 to ignore.
/kWh
A cycle is energy in and energy out, so by default both count.
Result
Put in your car, your rates and how often you would do it, then press “Work out what it earns”.
Estimate only — not a guarantee of earnings and not warranty advice. Verify against your own tariff, your programme’s terms and your manufacturer’s warranty before relying on this.