Sorry yes for clarification that he wants to parallel the INPUTS I am aware of
paralleling the outputs we do that all the time. Sorry for the confusion but
seems like the census now says NO on paralleling the 2 inputs from one array.
Andrew Perkins
Greenwired
P: 707-923-2001 ext. 100
1150 #1 Evergreen Rd
Redway, CA 95560
http://www.greenwired.com
---- On Tue, 07 May 2024 11:58:37 -0700 Howie Michaelson via RE-wrenches
<[email protected]> wrote ---
Yes, output not input. Thanks for clarifying that William...
Howie
Sun Catcher
Solar Electric Systems Sales & Service
802-272-0004
On Tue, May 7, 2024 at 2:55 PM William Miller via RE-wrenches
<mailto:[email protected]> wrote:
Andrew:
I see no problem paralleling the Charge Controller outputs but I would not
parallel the inputs. With parallel inputs, unless there is protection to
prevent excessive current, there is a risk that one CC will take over and try
to regulate the entire array.
I suggest you divide up the panels to create one appropriately sized discrete
array into each CC. You can parallel two strings of panels without OCPD.
William
Miller Solar
17395 Oak Road, Atascadero, CA 93422
805-438-5600
http://www.millersolar.com/
CA Lic. 773985
From: RE-wrenches [mailto:mailto:[email protected]] On
Behalf Of Andrew Perkins via RE-wrenches
Sent: Tuesday, May 7, 2024 9:24 AM
To: Re Wrenches
Cc: Andrew Perkins
Subject: [RE-wrenches] PWM Controllers in parallel
Hello Wrenches,
I have a client who has a large 2000 watt 12v array that he
said used to be hooked into an internal solar charger on his old trace. Never
seen a trace with one of those in it but he claims it could do 200a. This
internal charger has now died and needs a replacement. He is refusing to rewire
his panels into a new configuration and their aren't many options for him out
there. I did get him a Coleman Aire 400a Charge controller but it is more of a
load controller and wants to be able to properly absorb is batteries off the
sun. He currently has a c60 running only part of the array and now he is asking
about running another c60 in parallel. Not quite sure if this would work or not
but my gut feeling says no and there will be problems.
If anyone knows of any controllers that would fit that or if running those in
parallel works your advice would be greatly appreciated.
Andrew Perkins
Greenwired
P: 707-923-2001 ext. 100
1150 #1 Evergreen Rd
Redway, CA 95560
http://www.greenwired.com
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