Is this calculation free and private?

Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.

What does the Solar Inverter Sizing & DC-to-AC Ratio Calculator give me?

It works out DC-to-AC Overdrive Ratio, Estimated Daily Yield, Estimated Annual Clipping Loss and Suggested Min Inverter Size, updating live as you change the inputs.

What do I need to enter?

Just Solar Array DC Rating, Inverter Continuous AC Rating, Orientation Efficiency and Peak Sun Hours per Day. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Solar Inverter Sizing & DC-to-AC Ratio Calculator

Calculate solar photovoltaic DC-to-AC oversizing ratio (ILR), clipping loss percentage, and recommended inverter capacity.

100% free
Private in browser
No signup
No watermarks

Solar Array DC Rating (Watts STC)

Inverter Continuous AC Rating (Watts)

Orientation Efficiency (%)

Peak Sun Hours per Day

DC-to-AC Overdrive Ratio (ILR)

1.33

Estimated Daily Yield (kWh)

Estimated Annual Clipping Loss (%)

0.1

Suggested Min Inverter Size (Watts)

6,400

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About Solar Inverter Sizing & DC-to-AC Ratio Calculator

Calculate solar photovoltaic DC-to-AC oversizing ratio (ILR), clipping loss percentage, and recommended inverter capacity. Enter Solar Array DC Rating, Inverter Continuous AC Rating and Orientation Efficiency and the tool works out DC-to-AC Overdrive Ratio, Estimated Daily Yield and Estimated Annual Clipping Loss straight away. Everything runs in your browser, so your data never leaves your device.

How to use Solar Inverter Sizing & DC-to-AC Ratio Calculator

Enter Solar Array DC Rating, Inverter Continuous AC Rating and Orientation Efficiency.
Adjust the remaining options (Peak Sun Hours per Day) to match your case.
Read DC-to-AC Overdrive Ratio, Estimated Daily Yield and Estimated Annual Clipping Loss in the results panel — copy or download what you need.

Key features

Shows DC-to-AC Overdrive Ratio (ILR)
Shows Estimated Daily Yield (kWh)
Shows Estimated Annual Clipping Loss (%)
4 adjustable inputs, results update as you type
No signup, no limits

Frequently asked questions

Is this calculation free and private?: Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Solar Inverter Sizing & DC-to-AC Ratio Calculator give me?: It works out DC-to-AC Overdrive Ratio, Estimated Daily Yield, Estimated Annual Clipping Loss and Suggested Min Inverter Size, updating live as you change the inputs.
What do I need to enter?: Just Solar Array DC Rating, Inverter Continuous AC Rating, Orientation Efficiency and Peak Sun Hours per Day. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

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