[RE-wrenches] Charging Multiple Battery Banks
Max Balchowsky
max at seesolar.com
Thu Mar 26 01:58:42 PDT 2015
Does anyone have any experience with the PowerGrid battery system (by Clean Energy)? we are getting ready to install a 27kW array with a 22kWH Battery Bank and 4 Schneider/Xantrex XW 6848's.
Max Balchowsky
Design Engineer
Golden Bridge Development
1048 Irvine Ave Suite 217
Newport Beach, Ca. 92660
760-403-6810"Building a Better Future For The Next Generation"
From: Jeremy Rodriguez <allsolarjeremy at msn.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Wednesday, March 25, 2015 8:07 PM
Subject: Re: [RE-wrenches] Charging Multiple Battery Banks
I'm sure he will use the SW until it dies. I would. Never thought of running AC from the 24v side to the dual outbacks to charge the 48 V BB. Would need a xfmr though right?I would install a separate Midnite CC for each battery bank. I know the classics output 12v at the aux, so what type of relay could be used? Does it need to be solid state ?I would feel better using some type of control, or as was mentioned, maybe talk him into just hooking everything up to the OB system at the house. The 24v side would be for occasional use only.
Thanks for the input!
Jeremy Rodriguez All Solar, Inc. 1463 M
Penrose Colorado 81240
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
On Mar 25, 2015, at 11:25 AM, "Ray Walters" <ray at solarray.com> wrote:
Hi Jeremy;
I usually would combine both buildings all into one system, KISS principle, and also less cost. Later when those batteries die, replace with a properly sized bank. I also wouldn't be building a new system around an SW4024, those are getting really dated. Great inverter, but they don't last forever. They have excellent resell value on Ebay for folks that need replacements in dual and quad systems.
Having said that, Jerry's idea of 2 controllers on one array sounds like it would work, but not with Blue Sky because of the grounding as Larry mentioned.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760 On 3/25/2015 10:36 AM, Larry wrote:
Keep in mind that the Midnite controller has a combined PV and bat. negative and the Blue Sky requires isolated PV and bat. negative.
Larry Crutcher
Starlight Solar Power Systems
On 3/24/15 6:11 PM, Jeremy Rodriguez wrote:
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:
#yiv6321955796 #yiv6321955796 --.yiv6321955796hmmessage P{margin:0px;padding:0px;}#yiv6321955796 body.yiv6321955796hmmessage{font-size:12pt;font-family:Calibri;}#yiv6321955796 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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