The Blue Sky should still work as long as he switches PV positive and
negative. However, I like the idea of charging just the 24 volt system
and feeding AC to the Outbacks to charge the 48 volt bank. A little more
loss but mush easier to implement. You could easily control when AC is
fed to the 48 volt system based on voltage of the 24 volt battery.
Larry
On 3/25/15 10:24 AM, Ray Walters 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" <r...@solarray.com
<mailto:r...@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: jerrysgarag...@gmail.com
To: re-wrenches@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
<allsolarjer...@msn.com <mailto:allsolarjer...@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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