Maco 200

[sonoma]

you can find them on ebay. I use a 30 amp unit I bought for about 45.00 a couple years ago. here is a link to a lot of different ones. make sure you get one that will adjust up to about 13.8 amps. on the area you hook the wires up is a tuning VR to increase how many volts it will put out.

https://www.ebay.com/sch/i.html?_fro...y+12v&_sacat=0