I understand all that. Isn't Wilton trying to rig a charger for his electric chair? As I understand you have a different purpose for the hijacked current. Perhaps Wilton can hardwire a timer or a sensor that switches off when fully charged. It seems that 15-20 minutes would not be enough time to fully charge a low battery.
He and I have exactly the same purpose in mind: powering an auxiliary item for an indefinite period of time yet retaining all the other features of the system. I'm absolutely convinced (leap of faith) that all that is required to disable the timer function of the high-current relay (and it's not part of the switch) is a blob of solder in the right place. But getting to it, and finding out where to put the blob, may well be beyond Wilton's abilities at this point. We have no 124, so I can't even try to look into it for him. -- Jim