Require stable regulated DC 12v power off of batteries.

[Gonkulor]

Hello folks.

I have a project 1993 EZGO 36v Electric Golf Cart. I have a need for pure 12v DC. This cart has 1 bank of 6 6v batteries. I also have another aux battery pack with 3 12v deep cycle batteries for running my carputer, stereo, and lights.

I installed a carputer system and it has it's own M2-ATX PSU. While the M2-ATX is 160ish watts, that is just not enough current flow for my needs.

Here are my, albeit few, choices I have found. these are in order of preference.

1. 36v to 12v converters. 30-35 amps. These are around $140 each.
2. Multiple M2-M4-picu ATX PSU's. These are all around the $60-$100 range but there manuals say the 12v rails max current limits around 8-10 amps.
3. Use a 36v inverter and convert everything back to DC. The efficiency of this approach is terrible.
4. Tap straight off the batteries. This is not recommended and very unwise. Some of my components will stop working once the battery drain falls below threshold.

Have I exhausted all resources? Is there anything I'm missing which is cheaper?

Thanks for your replies in advance.

Best Regards
Gonk

[mariush]

You're not saying how many amps you need on 12 volts and what it's for (sounds like a lot of amps). Explain yourself and maybe people here can give some suggestions.