Off-Grid Solar System Calculator
Calculate complete off-grid solar system requirements including panels, batteries, and inverter
About this calculator
The Off-Grid Solar System Calculator helps you determine the complete solar setup needed for energy independence. It calculates the optimal number of solar panels, battery capacity, and inverter size based on your daily energy consumption and location. This tool eliminates guesswork and ensures your off-grid system meets your power needs while accounting for weather variations, system efficiency losses, and backup power requirements for reliable electricity generation.
How to use
Enter your daily energy consumption in kilowatt-hours, select your location or sun hours, and specify desired backup days. Input any existing equipment specifications if applicable. The calculator will generate recommendations for solar panel wattage, battery bank capacity, and inverter size needed for your complete off-grid solar system setup.
Frequently asked questions
How do I calculate my daily energy consumption?
List all appliances with their wattage and daily usage hours. Multiply watts by hours for each device, then sum the total watt-hours and divide by 1000 for kilowatt-hours.
What battery backup days should I choose?
Typically 2-3 days for most locations. Areas with frequent cloudy weather or critical power needs may require 4-7 days of battery backup capacity.
Does the calculator include system efficiency losses?
Yes, the calculator accounts for typical efficiency losses from batteries, inverters, charge controllers, and wiring, usually adding 20-25% to system requirements.