Impressed current systems are a waste of money.

For what its worth I was reading another post and wanted to reply but it appears to be closed so Ill just reply here.
I have one on the 2nd and vehicle I purchased and have disconnected it as all it does is flatten the battery when im away. It draws .05 of an amp!!

I work offshore on oil and gas platforms where impressed current systems are seen. Im a CSWIP qualified 3.2U if you want to know my quals.

Now impressed current cathodic protection systems do work, the steel just has to be immersed in an electrolyte. On a platform very basic version is you have a generator running topside with the platform hooked up to the negative terminal and the impressed current anodes hooked up to the positive and the current flows though the salt water and protects the structure from corrosion.

here is the big simple point why thei wont work on your vehicle unless its submerged in water.
1. The anode is insulated from the structure.
2. This system does not work above the waterline, nor is it effective in the splash zone!! Why because the structure needs the electrolyte to work the current flows through the electrolyte. If it worked in the air it would be the corrosion protection system above the water line, but it isnt, its purely the paint coat that stops corrosion above the waterline and keeping in maintained.