Technical FAQs 4

Do solar panels need a larger inverter?

In the past, virtually all solar systems featured panels and an inverter of equal capacity. Now many installers recommend having an array of panels with a holding power larger than that of your inverter. This is called inverter oversizing.

How efficient is a solar inverter?

As long as the input from the panels falls within the range of the window, the inverter can be considered to be operating optimally. In the graph below, the red line represents an average inverter efficiency and the green arrow represents the power output from your solar panels.

Should you oversize a solar inverter?

There is an increased risk of energy clipping to consider, but most installers will tell you the benefits of inverter oversizing far outweigh this potential drawback. Energy clipping occurs when more solar energy is harvested by panels than what their inverter can handle, essentially “wasting” potential power.

Should you buy more solar panels or upgrade your inverter?

Buying extra panels is often more cost-effective than upgrading your inverter. Photo: Mondiaux Solar. Oversizing allows your system to convert more energy when conditions are just right, delivering peak power for longer once the sun has left its prime position. “This increases your overall daily production,” Brian says.

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The solar wattage is greater than the inverter

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