I have something in mind I want to do - and that is provide basic lighting when we get a power outage. No candles !\r\n\r\nSo, here's my thinking. I need to provide power to the CBUS Network, a select number of LED lights (good enough for illumination), and Comfort is already ok as it has it's own battery supply. Once power goes, Comfort can trigger a response and activate CBUS.\r\n\r\nSo, I have 3 CBUS modules at the moment - 2 Dimmers and a Relay (will need to add another relay soon). I can remove the mains feed from these and provide this power form the UPS.\r\nOn the dimmer I should just feed the earth, live and neutral on the left-side yes ? I will not be using the dimmer units to provide emergency lighting - this is just because the dimmers have the power supplies (the relay module doesnt).\r\n\r\nThen on the relay , I could use the switched live to the UPS, and bring the neutrals and earth from those LED power supplies back to the UPS (rather than the common in the cabinet).\r\n\r\nQuestion is - what size UPS do I need ! I have a spare 1200W unit I think should be enough to test.\r\n\r\nG.