I recently completed the 3rd bi-annual Solar Panel Cleaning for a customer is Sunnyvale Ca. She was very pleased to inform me that she had compared year over year dirty panels to Clean Solar Panels and that the cleaning paid for itself and then some. She actually ended up with a + $ return on her investment in having her Solar Panels Cleaned. I look forward to hearing more great news like this from additional customers as their annual numbers come in and comparisons are done. If you also want Pioneer Services to help you save some money please feel free to give us a call at 650-248-3488.