Inverter Size Calculator – self2solar
Choosing the right inverter size is essential for a reliable and efficient solar power system. Our Inverter Size Calculator simplifies this
Below, we'll walk through the three essential steps for sizing your solar inverter properly. Your first step is understanding how much power your solar panels will produce—this is known as your solar array size. It's typically measured in kilowatts (kW) and calculated by summing up the wattage of all your solar panels.
For example, a 5kW inverter is designed to handle up to 5 kilowatts of continuous power coming from your solar panels. If your solar array generates more than the inverter's rated capacity during peak sunlight hours, the inverter won't be able to process all of it—some energy will be clipped or lost.
Knowing your array size allows you to choose an inverter that can handle that production efficiently—without over- or under-investing in capacity. The second step is understanding your system's DC-to-AC ratio, one of the most important metrics when sizing a solar inverter.
First up—your solar panel output. If your panels produce 6kW, your inverter should match that or come close. You don't need a perfect 1:1 ratio, but don't underpower it either. That's like putting cheap tyres on a Ferrari.
PDF version includes complete article with source references.
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