"Dear Mr Lord,
A brief note to say how pleased my wife and I are with the P.V installation. Everything happened bang on schedule-good planning. And not a ire to be seen in the house. The paperwork has all gone through ok and the little extras you did are much appreciated. The biggest bonus is the pleasure I get watching the company electricity meter running backwards most days. Very satisfying. Many Thanks for a great job.
Mr & Mrs Richards.