Calculates the solar panel size and power needed based on energy consumption and sunlight hours.
Start with your values, or try a preset.
Enter Daily Energy Consumption (kWh), Average Daily Sunlight Hours, Solar Panel Efficiency (%), and System Voltage (V) in the units shown.
Read Daily Energy Needed (Wh), Required Panel Power (W), and Approximate Panel Amperage (A) in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Daily Energy Consumption (kWh): 5 kWh; Average Daily Sunlight Hours: 5 hours; Solar Panel Efficiency (%): 18 %; System Voltage (V): 12V
Daily Energy Needed (Wh): 5,000 Wh; Required Panel Power (W): 5,555.555556 W; Approximate Panel Amperage (A): 462.962963 A
Daily Energy Consumption (kWh): 10 kWh; Average Daily Sunlight Hours: 5 hours; Solar Panel Efficiency (%): 18 %; System Voltage (V): 24V
Daily Energy Needed (Wh): 10,000 Wh; Required Panel Power (W): 11,111.11111 W; Approximate Panel Amperage (A): 462.962963 A
Daily Energy Consumption (kWh): 20 kWh; Average Daily Sunlight Hours: 5 hours; Solar Panel Efficiency (%): 18 %; System Voltage (V): 48V
Daily Energy Needed (Wh): 20,000 Wh; Required Panel Power (W): 22,222.22222 W; Approximate Panel Amperage (A): 462.962963 A
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