Model
PV yield and demand are reduced to an average daily surplus. Usable fraction and round-trip efficiency convert that surplus into nominal capacity.
Energy · Preliminary estimate
PV battery sizing
Pre-size usable and nominal battery capacity from PV yield, demand and a target autarky.
ENERGY01
This calculator gives a first battery-size estimate for covering a target share of annual demand with PV and storage.
02
Results
PV + load + storage
Complete the inputs and calculate.
Scope
The average-day balance does not replace a seasonal simulation with battery power, reserve, temperature and charge limits.
Assumptions
Inputs, units and assumptions remain traceable in the result. Planning and approval require measured data, manufacturer documentation and a time-series simulation.