The project was delivered in two stages with APS Micro inverters fitted onto the 250W modules and a completely separate system connected to external lights that stay on in the event of a power cut. 2 x 80wp panels lead to a charge controller & a 105 ah battery in the garage powering 4 or 5 external lights. A number of the homes will be holiday homes so it means they will still have some level of security even when there is no power.