A step-by-step formula to help you figure out the right number of solar panels and batteries you will need for your solar and battery storage project.
[PDF Version]
Free online solar panel output calculator — estimate daily, monthly, and yearly kWh energy production based on panel wattage, number of panels, sun hours, and system efficiency.
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Assemble a 500W system by connecting panels in series (4x12V=48V) or parallel (match inverter current); use MPPT charge controllers (95% efficiency) to optimize input; mount at 30-45° tilt for sunlight; pair with 600-700W inverter (85%+ efficiency); test with multimeter .
[PDF Version]
00 kW system of 20 panels at 400 W each would cover 104% of your 10,500 kWh annual electricity use. It would produce 10,936 kWh/year and need about 560 sq ft of unobstructed south-facing roof space (including fire-code.
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