[RE-wrenches] Mate3s conflict with FM100

[Jay]

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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