Solar engineering calculator
Estimate the size of your solar system and check your cable cross-section in a few seconds.
Results are preliminary estimates and do not replace an engineering design. Contact our specialists for an accurate design.
Estimate
Suggested capacity—
Number of panels—
Approximate area—
Inverter rating—
Annual production—
CO₂ avoided per year—
Approximate investment—Estimated; prices change with the market — call us for today's price.
How is capacity calculated?
Daily consumption is divided by peak sun hours, then system losses (heat, dust, cables and inverter) are added. The result is rounded up to whole panels.
What about batteries?
For off-grid systems, battery capacity = daily consumption × days of autonomy ÷ usable depth of discharge. Lithium batteries can use more of their capacity than lead-acid.
Why voltage drop matters
A thin or long cable wastes energy as heat. On the DC side, keeping the drop under 3% is a common design target.