Free tools
12 free solar calculators for Afghanistan
Size a complete solar system in seconds — panels, inverter, battery, cable and tilt angle, using real Ghazni sun-hour data. No sign-up, no cost.
Solar System Size Calculator
Enter your monthly usage and get the full system design — kW, panels, inverter and battery.
Open tool →Solar Panel Calculator
Panel count and roof area for any monthly electricity usage.
Open tool →Inverter Size Calculator
Correct hybrid inverter rating with surge headroom for your load.
Open tool →Battery Bank Calculator
Lithium vs lead-acid capacity sized for your backup hours.
Open tool →Cable Size & Voltage Drop
DC wire thickness, voltage drop percentage and breaker rating.
Open tool →Tilt Angle & Direction
Best fixed tilt and orientation for your latitude.
Open tool →Solar Payback & ROI Calculator
See how many years your solar system takes to pay for itself and what it earns over 25 years.
Open tool →Generator vs Solar Cost Calculator
Compare five-year running cost of your generator against an equivalent solar system.
Open tool →Appliance Load Calculator
Add up your appliances to get daily kWh, peak watts and the inverter you need.
Open tool →Solar Water Pump Calculator
Size a solar pump and array from well depth, daily water need and sun hours.
Open tool →Roof Area to Solar Calculator
Turn roof length and width into panel count, kW capacity and yearly production.
Open tool →String Sizing Calculator
Temperature-corrected panels per string for safe inverter voltage limits.
Open tool →Ready to switch off the generator for good?
Book a free site survey in Ghazni. We measure your load, design the right system and give you a fixed written price.