[RE-wrenches] Mate3s conflict with FM100

[John Blittersdorf]

Jay, yes there is a FNDC. It is an older system that had been working OK.?

On Thu, Aug 14, 2025 at 8:37 AM Jay via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi John
>
> Is there a FNDC in the system?
>
> And I’m presuming this is a new issue with the system being some years old?
>
> Jay
>
> > On Aug 14, 2025, at 6:14 AM, John Blittersdorf via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
> >
> > 
> > At a service call yesterday the customer reported that his 2 FM100's
> stop charging with float lights lit when the batteries are very low (46V).
> When he unplugs the MATE3s charging goes back to normal.  SInce the mate is
> off and he doesn't have an external TriMetric or other current reading
> device, he called me to check if the solar was in fact putting out
> current.  My clamp meter confirmed that the FM 100's were both working fine
> until we plugged the MATE back in.  I tried a new MATE with the same
> result.  He has a HUB 10 but I didn't have one with me to try.  Any Idea
> what the problem might be?.  I checked all charging parameters.  Any
> suggestions?
> >
> > John Blittersdorf
> > Of Grid Vermont
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