MPPT 75/15 Showing voltage but no current

DIY
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1

I have a set-up with 6 panels and 6 MMPTs. Worked fine for for best part of a year, now one is showing Volts but no Amps. Looking at history, this one has been on and off whereas others have been consistently on. I have seen older posts about a battery temp reading being the issue, but I don’t have that feature.

Any help much appreciated
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2

Post a Victron Connect screenshot of the mppt’s detailed history.

Common mppt no charge issues.
Bad panel, bad connection between panel and mppt, maybe a bad fuse/breaker between the panel and mppt .

Or perhaps the fuse in the bottom of the mppt is kaput,or a fuse between the mppt and battery.

3

Sounds like a similar problem I had recently with one of my MPPT chargers.

Turned out to be a problem with the MC4 connectors

Could you maybe swap around the panel/charger connections to see if the issue moves with panel or stays with the charger? A process of elimination?

Also, do you use any of the cheap torpedo shaped DC breakers? I had a problem some years ago where they would drop voltage under load, despite not getting warm. Only used quality Durite breakers since then with no more issues.

4

Thanks. I have added screenshots to my post. This morning, its working again. Very strange

5

Thanks - The cabling is very (too) tight and there isn’t enough room to change them as suggested. I don’t think there and any MC4 connectors