Originally Posted by CBFranger
Alternators and batteries are the only way to solve a steady voltage drop problem. Caps simply stableize voltage.
Rewound alternators are alright but they tend to make less power at idle than an HO alt.
That idle problem is dead on. I had this when I bought a 200 amp alternator in a bigger case (3G large case as opposed to the 3G small case).
My solution was to calculate the size pulley needed that would be smaller than the one I had, but wouldn't result in over-spinning the alternator. As it turns out, that happened to be the smallest pulley I could find anyway. It helped.
If you have an underdrive pulley on your crankshaft, then the problem is compounded.
My amperage requirements are because of a winch, but I also have a second battery, switching system, and a solar charger to keep the second battery at "peak" while "offline" from the main charging system. This way, it offers the ability to be a "self jump start" power source.