[RE-wrenches] PWM Controllers in parallel

[Howie Michaelson]

Yes, output not input. Thanks for clarifying that William...
Howie

*Sun Catcher*


*Solar Electric Systems Sales & Service802-272-0004*


On Tue, May 7, 2024 at 2:55 PM William Miller via RE-wrenches <
re-wrenches at lists.re-wrenches.org> 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
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
>
> *From:* RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] *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
>
> www.greenwired.com
>
>
>
>
>
>
>
>
>
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