We washed the panels. So had the rain.

A display campaign from the School of Continuous Improvement, led by its pre-registered trial of quarterly rooftop-solar washing.

A marketing poster for the School of Continuous Improvement shows a clubhouse roof of solar panels in a rain shower, a bucket and a long-handled brush set down under the eave, and presents the School's energy research through its published trial of quarterly panel washing across forty community sports clubs. It invites the passer-by to visit the University, and points to three further studies of photovoltaic systems in ordinary use.

@misc{slop_7lrtvf,
  author       = {Renke Sabel},
  title        = {We washed the panels. So had the rain.: A display campaign from the School of Continuous Improvement, led by its pre-registered trial of quarterly rooftop-solar washing.},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.7lrtvf},
  url          = {https://slop.university/outputs/slop-ad-we-washed-the-7lrtvf/},
  version      = {1.0},
  note         = {Marketing poster},
}