[RE-wrenches] Charging Multiple Battery Banks

Kevin Pegg kpegg at energyalternatives.ca
Tue Mar 24 18:54:11 PDT 2015


Interesting! I was head-scratching as to how to do an identical task. I'd think a contactor on the HV PV output side suitably rated for voltage/current triggered by the aux output once the Classic goes into float would do the trick. I recall the Classic has that feature but never used it yet. 
 
Kevin

-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org]On Behalf Of Jeremy Rodriguez
Sent: March 24, 2015 5:11 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Charging Multiple Battery Banks


The thought was to charge the batteries for a new building utilizing an SW4024 with new classic controller and new L A batteries, and once those batteries are charged send the PV to the house system which is the 48v setup with dual outback inverters and dual SB3048 CCs.  Lead acid batteries as well. 3 years old 
I've never had this come up in 16 years!


Jeremy Rodriguez  
All Solar, Inc.  
1463 M

Penrose Colorado 81240

Sent by Jeremy's iPhone. Sorry for typos and shorthand!

On Mar 24, 2015, at 5:31 PM, "Ray Walters" < ray at solarray.com> wrote:



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> 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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