Yet another converter question

[Natty]

I know this topic has been beaten to death, and I have done numerous searches, but I am still not positive what I need for a 24v - 12v converter. In my 87 BJ 73, I need to run my new stereo, which includes a sub box and a 300w 2 channel amp. I also would like to run my CB radio. I am looking at the ICT 20 amp converter from Huttons, here in Calgary. So, bottom line - new cd player, 300w amp, and CB radio. What do I need for amps in a converter? Please help!!

[zaxxon]

Once you add an amp to the equation you should go to 30amp. The load that an amp creates is going to be a large draw. Look at a capacitor for your amp and a charge balancer for yur batts. My view is best to spend a little more up front than deal with two dead batts when it is least convenient[been there]. Here is a good place to do a little reading re 24v issues.




http://www.newcruiser.ca/index.php?CID=2G

[eleblanc]

Natty, what you need to find out from a radio shop is how much amp max your radio system will pull.

I've been using a 16 amp, for fog lights, CB, radio, and lighting in my BJ for a very long time without issue with a 16 amp converter. Unless you radio amp is going to pull alot i'd guess you will be fine. But if you do not want to take chances call a radio guy, tell him what you and what amp max you will draw.

[Stone]

An Amplifier wanting to put out 300W at around 13V will require roughly 23A according to Ohm's Law.

For your type of demand, I would highly recommend the Solar Converter as discussed in several threads here and linked in the FAQ section. The setup as I had last discussed it will allow you to draw large transient loads from your low-side battery and the Solar Converter will continuously equalize them to keep them happy. The switch also allows you to go into strict step-down conversion without interrupting current to your accessories, should you need to do that (like leaving your truck for extended periods, especially in cold weather).

I wouldn't go too much more in terms of accessories and load demands as your diesel alternator does not put out very much current at all.

Good luck.