Harnessing solar power starts with knowing your energy needs. With our Solar Photovoltaic Calculators, we provide free online tools to help you plan and size your solar system with confidence. Whether you want to estimate the daily energy demand of your appliances or check the Peak Sun Hours (PSH) available in your city, these calculators give you quick, reliable insights.
One of our most popular tools is the Appliance Energy Consumption Calculator (kWh/day). Simply select your household or office appliances from the drop-down menu, enter the number of hours each appliance runs per day, and the calculator will estimate the daily energy requirement.
Each listed appliance includes a 20% buffer to account for system inefficiencies, ensuring a more practical estimate. For the most accurate calculation, check your appliance label for its wattage (or calculate using amperage × voltage). If your appliance isn’t listed, you can share its details with us for inclusion.
This calculator is particularly useful for:
Beyond appliance usage, another important factor in solar planning is Peak Sun Hours (PSH). PSH refers to the number of hours in a day when solar irradiance is strong enough (1,000 W/m²) to generate useful power.
Our calculators also provide PSH values for major Nigerian cities. These values help you understand how much sunlight is available for your panels to convert into electricity. Lagos, Abuja, Port Harcourt, Kano, and other cities have unique solar profiles, and knowing this data ensures more efficient solar PV system design.
While our calculators give you a solid starting point, a full solar design involves more detailed considerations—like inverter sizing, battery storage, and safety margins.
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