36V soalr panels, charge controller with 12V out?

1 Posts
Oct 22, 2007 11:34 am
36V soalr panels, charge controller with 12V out?

I have 3 USED and broken 36V panels in parallel that still output 2-5A total power that I got free.  Most of my internal systems run on 12V.  I am trying to come up with a reasonable cost charging solution and use.

Since I have the 36V at what we will assume is 3A.  I have not purchased anything YET and am looking at my options.

Most things I use can use 12V easily.  But 36V is tough,  I can buffer the 36V into a regular 12V battery if I run it and pay attention to it, but I would like a more efficient better use solution.

I was thinking of getting a 36V charge controller.
I was thinking of getting 3x 12V batteries for 36V, 12AH.
I was thinking of getting a 36V to 12V DC-DC converter.

For a small system though, is this the best solution?  Is there a charge controller for 36V with the DC step down to 12V one unit cheap that can do it in one step?

Cost for the reasonable solution?  I was hoping it should cost less then $200, without the batteries.  But cheaper is better since these panels were near free to start with.

I would love to hear all thoughts and reasonable suggestions?

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