[RE-wrenches] GFP and multiple charge controllers

[Kent Osterberg]

Nathan,

I don't think anyone makes a 100-amp PV GFP. The panel mount breaker 
model that's being used for the PV GFP doesn't include a 100-amp breaker.

The Classic has a built-in GFP so you shouldn't need an external GFP for 
it. You will need to add a GFP for the FM60 - a single 80-amp GFP would 
work.

You can use the dual 80-amp GFP and shut down both PV arrays at the same 
time if the GFP is wired to disconnect the PV array from the charge 
controller input. That's where Outback's instructions used to show the 
GFP, and it is a better place for it than on the charge controller 
output anyway. Midnite's instructions show the GFP on the charge 
controller input, but their 80-amp GFP is a single.

Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com


On 4/17/2012 11:08 AM, Nathan Stumpff wrote:
>
> Wrenches,
>
> In a job coming up I have a customer with an existing FM60 controller, 
>  520 watt (!!) array. We are doing a ton of work, including adding a 4 
> kW solar array with Classic 150 charge controller. I am trying to 
> figure out how to handle the GFP.
>
> For the Classic, I need a 90 or 100 A output breaker minimum. 80 A is 
> not an option. The OutBack dual GFP is 80 A, and so it not an option.
>
> Is there a 100 A GFP breaker assembly I have just never seen? Is there 
> a way to use the Classic's GFP to run an external relay via AUX (to 
> trip the FM60 output breaker at the same time)? Any ideas?
>
> Thanks,
>
> -Nathan
>
> --
>
> Nathan J. Stumpff - Arctic Sun, LLC
>
> NABCEP Ceritified PV Installer #091209-175
>
> nathan at arcticsun-llc.com <mailto:nathan at arcticsun-llc.com>
>
> Office: 907/457-1297
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20120417/70732984/attachment-0003.html>