Five calculators for your solar setup
Transparent formulas, visible assumptions, results linked directly to products in our catalog. No email capture, no redirects to external platforms.
5
Calculators
100%
Free
0
Emails asked
12
Languages
Solar system sizing
How many panel watts you need for your daily consumption.
Battery capacity
Tick your appliances and get the Wh capacity you need.
Savings and payback
How much you save per year and how long the investment takes to pay off.
Roof area needed
How many square meters of roof you need for the target wattage.
Battery charge time
How many hours to recharge a battery from your panels.
Not sure where to start?
Answer 4 short questions and get a matched panel, station or kit recommendation.
Shared methodology
Every calculator shares the same baseline: 25% standard system losses (cabling, charge controller, temperature), 80% depth-of-discharge for LiFePO4 batteries in modern stations, and a 20% margin for inverter losses and cloudier days.
Results are estimates — for a real build ask an installer. Sun-hour figures use European averages: 2.8h in the north, 3.5h in the centre, 4.5h in the south.
System losses
25%
cabling, MPPT, temperature
LiFePO4 depth-of-discharge
80%
usable capacity
Safety margin
+20%
inverter, cloudier days