Solar Panel Cleaning ROI Calculator

Solar panel cleaning typically 80-200 per service. Restores 5-15% generation lost to dust/dirt. For 1,500/year solar generation: 10% recovery = 150 saved. Annual cleaning often pays back. Self-cleaning rain-prone climates may not need it.

A worked example

Try the defaults: cleaning cost of 120, output increase of 8%, annual generation value of 1,500, cleanings per year of 1. The tool returns 0.00. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.

What moves the number most

The result responds to Cleaning Cost, Output Increase %, Annual Generation Value, and Cleanings Per Year. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.

The formula behind this

Annual benefit = generation × increase. Cost = cleaning × frequency. ROI = benefit - cost. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.

Cost vs value in green choices

Sustainable options usually cost more upfront and less over time. This tool separates the two so the comparison is fair — looking at purchase price alone consistently makes the green option look worse than it is once lifetime costs are tallied.

What this doesn't capture

Carbon reduction, health benefits, and local air quality have real value the financial figure doesn't price. The calculation gives the money side honestly; for the full picture, note the non-financial benefits alongside.

What to calculate alongside this

One figure by itself is fragile. The solar payback calculator, the solar battery storage calculator, and the solar panel battery storage roi cover adjacent ground — the answer to any one of them changes how you read the output from this tool.