Originally Posted by hontri
Make sure to float the ground on the ac side.
You can float ether one.
Henderson, I'd run 100W to the headlight through the AC reg, connect the other 100W to the BD system, tap in to 12V on the BD system and run a USB converter off the 12V. You'll get allot of power for bright headlight 100W and the remaining (100W) will easily power what's left.