We found the solar panel company via a scheme run by Cambridgeshire County Council: Solar Together. The install date finally came round. The company, Greenscape Energy, arranged the scaffolding prior to the day. The system we agreed on: 15 QCell 340W panels, 5.1 KW system with 7.2KW pylon batteries. Solis Inverter. Directly south facing, 20 degree incline.  So far we are producing more electric than we are using but its early days and heating isn’t on yet!  The illustration estimates a 10 year return on investment. So harder decision to make than the ASHP which is a 5 year return. And ASHP decision was easier as we needed something in place for lack of any boiler and didn’t want to replace the old oil boiler with a new one. I think the solar panels go well with the ASHP and make sense. The Solis phone app is great. It hard not to look at it all the time! It tells you how much you are generating at any one time (roughly 5 minute delay from real time), how much is going to or from the