Solar Panel Load Calculator
The only solar power calculator that simplifies solar panel system size and cost based on your energy needs, location, and system type.
Solar Power Calculator
Final Solar System Size: kW
Number of Panels:
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Understanding the Solar Load Calculator
The solar load calculator helps you estimate the size of the solar system needed to meet your electricity consumption based on your location and system type.
Monthly Electricity Units (kWh)
You start by entering your monthly electricity usage (kWh), which is used to determine how much energy your solar system must generate.
Peak Sun Hours for Your City
The calculator adjusts for the peak sun hours in your city, reflecting the average daily sunlight available for solar power generation. Cities with more sunlight (like Karachi) require smaller systems, while cities with less sunlight (like Gilgit) need larger systems.
System Type: On-Grid, Off-Grid, Hybrid
On-Grid Systems
An on-grid system uses solar power during the day and sends excess energy to the utility grid. It uses a basic multiplier to account for inefficiencies.
Off-Grid Systems
An off-grid system operates independently from the grid and must store energy for nighttime use. To account for extra energy storage, the system size needs to be high.
Hybrid Systems
A hybrid system combines on-grid and off-grid features, providing backup power during outages. The calculator applies a multiplier for this system to cover backup and storage needs.
Panel Size and Final System Size
You also specify the solar panel size (e.g., 500W). The system calculates the number of panels needed based on your energy demand. To account for inefficiencies, the base system size is divided by 0.8, and additional multipliers are applied for off-grid and hybrid systems.
Frequently Asked Questions
The solar calculator estimates your energy needs based on your electricity usage, factoring in peak sun hours to confirm solar irradiance in your area. And then calculates the optimal system size and costs.
Solar size is calculated by dividing your average daily energy use (in kWh) by the peak sun hours in your location and adjusting it for cloudy days.
Sun hours are calculated using local solar irradiance data. It varies from 5 hours to 7 hours in Pakistan.
Yes, it can give you the size if you enter the power rating of the solar AC. But it is recommended to explore this guide about finding the panels needed for solar AC.