Very impressed - finally after dealing with other vendors - getting quotes and asking about many details and technical questions we decided on RAD and I couldn't be happier. Service, support, details - it's the details that are important. Communication is very important and they answered my questions after I read the inverter manual and documentation and I have the system organized (the backup stuff) the way I want. I am extremely pleased and am looking forward to Endesa getting their stuff worked out (ie: the plan change to the solar tarrif which they have been working on for over a month (I inquired again Friday and received a response today that it's still in the works).. If anyone has questions please drop me a note..