Complete transparency with all customers. We give all customers a real internal cost sheet, including profit. simple. Owner and staff gives customers our cell phone numbers and the phones don't ring. Owner was Porsche mechanic for many years, computer network engineer the last 25 years, home phone number in the phone book and has lived in the same place for 64 years. All systems built to a "plus 1" standard (better than code) so the owner sleeps well at night. Normally stocks 100KW of panels at any given time.