BadenP

Thank you for your quick response, I have not been to site yet, I just have this information to work on, it's an HPS150-HV, batteries, grid and Solar Panels. I will be going to site on Tuesday, then I can check certain spec's myself, take some photos of the system, particularly the Circuit Breakers and The EMS, then when I have the required information do you mind if I tap into your knowledge once more.
I didn't install it and haven't worked on the Atess before, I have worked installation on some other products, so I'm not new to solar. I started installing solar about 9 years ago on the farms near us, due to cable theft, they used to sit up to 6 out of 8 days without power sometimes. A bit about my background, from school I joined the South African Air Force(1981), and studied through them and obtained my Diploma. The training was excellent as I worked with the aircraft equipment, not just Ground Radio & Radar, we were exposed to ILS systems, radio, radar, Decca Systems etc. Then after leaving I obtained a Diploma in software development. The reason I mention this is because we have so many systems damaged by Electricians not understanding the DC component of the system, so I'm I'm not some handyman trying to make a buck, and boy, we have plenty in South Africa, we call them the bakkie brigade. These people are paying good money and not getting the service or a working system before they vanish. Apologies about the long story but at least you know a bit about my background, I understand what I'm doing, I just have the problem of not being able to sign off the grid connection, because I studied Electronics, not Electrical.
Regards
Baden