Professional Tool
Solar Power System Calculator
Enter appliance loads, operating hours, and design assumptions to generate a professional first-pass estimate for panel sizing, battery bank capacity, inverter power, and charge controller current.
Professional use
Fast estimate before quotation or site survey
Final engineering should still validate shading, irradiance, temperature, battery chemistry, and cable losses.
Inputs
Loads and design assumptions
Example: 100A on a 24V system means a direct running load of 2400W.
Daytime operation is used for direct solar generation sizing.
This portion drives the storage battery sizing.
Add batteries to increase night supply. It is best to add them in groups compatible with the system voltage.
This mode is ideal when you know the required load, such as 100A, and want to see daytime and nighttime operation, with the option to strengthen night performance by adding batteries.
Appliances and loads
Description
Qty
Watts
Day hours
Night hours
Total
How many days the battery bank should support without full solar charging.
This directly affects the required battery bank size.
A common value in Iraq and many Middle East locations is between 5 and 6.5 hours.
Accounts for losses from temperature, dust, wiring, and conversion.
A common value is 1.2 to 1.3 above the simultaneous running load.
Auto: 12V for smaller loads, 24V for medium systems, 48V for heavier systems.
Next Step
Ready to turn the estimate into a technical and commercial proposal
After the preliminary sizing, Fortify can review battery chemistry, actual load behavior, mounting space, and site conditions to finalize the solution.
