Case studies

Commercial Pilot Project

Commercial Pilot Project


Increased production


Average increase over eight-month period

On February 24, 2020, RST installed a PILOT project on a single inverter's worth of panels at a large commercial site. Performance data was compared for 8 months between the RST-inverter vs. non-RST-inverters.


  • Two manual cleanings were performed during the PILOT in which the owner spent thousands of dollars. The panels were dirty again in a matter of weeks.
  • RST improved production by over 10.6% on average over the eight-month period despite 9 rain days in March/April and the two cleanings.
  • Soiling rates steadily increased through the season. In the last two weeks of October, soiling rates increased to over 1%/day.

For more information, download

the case study here.

Why RST CleanTech?

Over 10 years ago, we set out to solve one of the biggest problems facing solar – panel soiling. We wanted to find a way to keep panels clean, maximize energy production, protect panel warranties, and increase revenue for system owners.

We knew there had to be a way to achieve our goals that didn’t entail deploying thousands of bristle-wielding workers or robots onto high voltage solar arrays across the world. When we realized there wasn’t, we created one. Enter, RST NightWash™.

RST NightWash™ is a safe, cost-effective, and eco-friendly automated solar panel cleaning solution.


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