[RE-wrenches] Charging Multiple Battery Banks

Ray Walters ray at solarray.com
Tue Mar 24 16:31:15 PDT 2015


What's the reasoning behind two different battery banks at different 
voltages? What is the other equipment involved: batteries type, age, 
inverters, etc.?

R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760

On 3/24/2015 5:07 PM, Jeremy Rodriguez wrote:
> It would be 2kw of PV
>
> Jeremy
> All Solar
> Penrose, CO
>
> ------------------------------------------------------------------------
> Date: Tue, 24 Mar 2015 12:17:20 -1000
> From: jerrysgarage01 at gmail.com
> To: re-wrenches at lists.re-wrenches.org
> Subject: Re: [RE-wrenches] Charging Multiple Battery Banks
>
> How big of a system are you looking at as some of the smaller charge 
> controllers are auto sensing
> Jerry
>
> On Tue, Mar 24, 2015 at 12:11 PM, Jeremy Rodriguez 
> <allsolarjeremy at msn.com <mailto:allsolarjeremy at msn.com>> wrote:
>
>     Wrenches,
>     I have a client that wants to charge a 24v battery bank and a 48v
>     bank with the same array. Different charge controllers, with some
>     type of relay is what I was thinking, and using the controller's
>     aux. 12v output for the relay control.
>     The primary battery to be charged would be the 24v bank, then once
>     it is fully charged, divert the pv to the secondary controller at
>     the 48v bank.
>
>     Any comments or recommendations on this would be helpful.
>
>     Jeremy Rodriguez
>     All Solar Inc.
>     Penrose, CO
>
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