The 12V power system is developing well. The solar panel is charging the batteries, although the charge rate is haphazard (probably due to the Scottish weather)
I am running 2 battery packs (each of 3x 7Ah) at the moment, although the plan is to increase the array to 8 packs. This will considerably increase the capacity although it will take far longer to charge from my wee panel.
I have also decided to fit a switch for the lights at the entrance to the garage. I have already fallen over a few things whilst attempting to get to the light switches and have tired of this already. I intend to switch a single 20W lamp with the door switch, with the other lamps being switched by the main panel.