Battery vs generator hybrid savings calculator
Savings.
Compare running a generator on its own with using a battery alongside it. The result is a planning estimate, with the assumptions visible so they can be checked before quote.
Generator model
Manufacturer dataView source
Manufacturer datasheet values for the QAS 25 ID T4F. Confirm local model, voltage, fuel, and site conditions before quoting.Diesel price
GBP/litre
Enter your own diesel price if you know it.Generator size
kVA
Usable power allowance
How hard it works
%
Run time per day
hours
Days used per year
days
Servicing allowance
GBP/hour
Fuel use at different effort levels
Use the manufacturer sheet where you have it. Verified examples use published fuel figures from the source shown above. Planning examples are fine for early checks; final savings should be checked against the exact generator.
25% effort
L/h
50% effort
L/h
75% effort
L/h
100% effort
L/h
Battery setup
Battery choiceFinal usable energy depends on the exact battery setup and operating limits.
Battery energy used each day
kWh
Generator running time saved
%
Charged from mains power
%
Mains electricity price
GBP/kWh
Battery charging efficiency
%