@Virtualrain - your project is amazing, great work.
I have one question to you. I plan to use T-Balancer Big NG to control 3 Laing DDC 12V 1RT pumps (10W power consupton each). Do you know if T-Balancer is able to handle three of them ? As I looked on specs there is written that T-Balancer can handle 20W analoque per channel (80W total) so I gess it should work nicely. Any experience with this ?