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My PV array(s) is(are) finally commissioned, they have been on the roof since November last year! Two reasons for the delay: Mains power required in the house (Available Feb), also final second fit electrical, no extensions! Internet required!!! The installers tried setting it up at the end of March but failed! They returned last week when I was there and basically I did the commissioning work!!! (Following the instructions). I have 37 x 280W Monocrystalline panels JAM6(K)-60-280-4BB (Chinese from the supplier) each coupled to an enphase micro-inverter. These are wired via 3-phase cable (house is 3-phase) into their own breaker board, then onto the main board via an import meter. Teh array is split up 10 panels SE and 27 SW, each array has it's own breaker and there is a noise suppressor in the box also. An enphase envoy is wired in next to the breaker box and communicates with micro-inverters via powerline and the world by my Wi-Fi (on an isolated subnet). The problem was that the envoy (brains) could not communicate with the micro-inverters so the system was not coming online. The installers commissioning the system were stumped so after about an hour I went up into the attic to help, First of all connecting the system to my Wi-Fi (not the temporary BT Hub from build), then I downloaded the installer app (iPhone), they logged me on, and following the instruction on my laptop set up the array details (all micro-inverters were serial numbered) and set it to work. Remarkably all micro-inverters were detected but only 2/3 communicating (powerline problems), by this time it was past support hours so they planned to come back the next day. In the meantime my electrician came in to do some odd jobs, I explained the issue to him and he suggested that they take a power feed directly off their breaker board (behind their noise suppressor) for the envoy rather than use the socket that is on the attic ring. When the installers returned the next day, I passed on the advice which they confirmed with the enphase support people and fitted the dedicated socket, unsurprisingly all bar one reported in and that one has since done so. My array is now up and running: It can be viewed here: https://enlighten.enphaseenergy.com/pv/public_systems/yYpm1387793/overview?preview=1 I have managed over 8kW in the current garbage weather and over 40kWh on one day! As an aside I had to have an interim EPC produced before the array was commissioned to enable full FIT rate claim, the EPC will be subsequently re-assessed (with Solar) to give a final realistic figure. It is a quirk of the system (designed for retrofit not new-build) that if you commission a system without a lodged EPC, you get a FIT rate of about 10% of the current puny rate, but you cannot include Solar in your EPC until it is commissioned, so you end up doing it twice!!