My driver's regulator has a stripped gear as well as an weak motor. The other windows are fine. The rig has 140k mi. I've put 22k mi on it in 7 years.
I live in CA. When it's cold in the winter we wear socks inside of our shoes and long sleeve t-shirts.
I had that idea awhile ago. It's just a buck-boost voltage converter. I'd make my own if I needed it.
They
are cheap. IYKYK.
Programmable DC-DC Buck Boost Converter 4A 5V to 30V In and 0.5V to 30V Out
https://share.google/TvoaYjNWybOJOv1Cr
With this one you could run lower volts (13.5) in the summer to preserve the motors and higher volts (15-16v) in the winter when you need some extra power to move the frozen parts. I'd plug it right in place of the fuse. Easy-peasy.