Wow, what a response. Thanks for all the help guys, really appreciated.
The good news from today is that I spoke to MCS and they then added the panels, manufacturer and BABT details to teh MCS database. A quick call to the girl in the office at the installers co. and I now have the MCS cert with all the correct details on it.
Re. the contract, B. Gas said on Friday that it would be 3 weeks before i get any respones and they had 9000 applications last week and were already 3 wks behind. So I need to decide whether to speak to MCS before or to leave it and concentrate on the snagging list with the view of someone who understands what they are doing.
A lot od the problem was the trades coming on different days and seemingly never worked with each other before (the roofer said this was typical of this group), but I run a business and you need to understand the job and who you need. I have been less than impressed by the MD, Sales Dir and the panels 'expert' . All have told porkies, or just not read/understood the details (which is worse?). The MD even got the 'single string of 10', highlighted above, wrong. I have to insist that it should be 2x5 even with the backing of SMA who said it might blow the inverter and would min. invalidate the warranty.
I have started to go through all your comments and list the faults and what I feel should be done to redress, but Worcester's approach of an expert assessment seems the more b/w approach to take.
I will start by calling them tomorrow (now I have the MCS - even if the corrupt it) and saying I have a 'few issues that I will write up and send to them, so suggest they leave the scaffold up (its been up since the 22nd Nov anyway: 2 cancellations the evening before).
I am still trying to get them to send the G83 OK, but I'm not hopefull that they applied in the 1st place.
Question: With the Sunny Boy, there is a deal on the free 20yr warranty (OK only small beer, but..) can I apply for this myself with the serial no, etc, or would it have to be the installer?