[RE-wrenches] Breaker trip

[William Miller]

Mac:

Is this breaker perchance a GFDI breaker?  If so, the tripping could be
indication of current flow in the bonding leg.  This is a more nuanced
problem.

William Miller

PS:  I am not familiar with the Midnite charge controllers.  I do know there
are differences on how charge controller negative leads should be connected
from manufacturer to manufacturer.  For example, Outback charge controllers
can accept just one negative lead from a common bus.  Blue Sky controllers,
on the other hand, require both a negative connection from the PV and one to
the battery bus.  This should be checked to eliminate as a contributing
factor.

William



Lic 773985
millersolar.com
805-438-5600

-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of August Goers
Sent: Wednesday, December 06, 2017 7:00 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Breaker trip

Hi Mac,

What size breaker is tripping? I assume you are running at 48 v?

August



On Wed, Dec 6, 2017 at 4:18 AM, Mac Lewis <maclewis1 at gmail.com> wrote:

> Hello wrenches,
>
> I've got a mysterious breaker tripping that I need some ideas on how
> to fix.
>
> Original system:
> Array 6 x 235W Kyocera modules
> 1 x Outback FM60 charge controller
> 1 x Magnum MS 4024 PAE inverter
>
> Upgraded system we stacked a second inverter to accommodate an air
> compressor:
> Array 6 x 235W Kyocera modules
> 1 x Outback FM60 charge controller
> *2 x Magnum MS 4024 PAE inverter*
>
> There have been no changes to the solar array, just to the inverter
> side of the system.  We have been getting intermittent breaker
> tripping (a couple of weeks between) on the battery breaker side of the
> charge controller.
> The basics have been checked and rechecked.  Torque is good on all
> sides of the breaker all the way to the battery bussing.
>
> The only thing that I can think of is that during a surge on the AC
> side its sucking enough current out of the charge controller caps to
> trip this breaker occasionally.
>
> Has anyone experienced this?  The only way I can see to fix it is to
> go with a larger breaker ampacity, but maybe there is something
> better.  Does anyone no how quickly the max current setting in the
> Outback can respond, would dropping this help?
>
> Thanks
>
> --
>
>
>
> Mac Lewis
>
> *"Yo solo sé que no sé nada." -Sócrates*
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