1-2 second user created short on main battery bus bar… What have I done?

Planenut · January 4, 2026, 6:51pm

Shame on me! I was double nutting all the main connections and temporarily shorted across the main battery bus. 6 - 100 amp hour Battleborn batteries in pairs at 24 volts. System seemed to shut down as I removed the wrench. Everything seemed to come back normally but even though all my dc items are working, the Cerbo display no longer shows a dc draw or a percent of battery. I tried powering down the system for 5 minutes and disconnecting both side of the Shunt. I have not been able to get the dc draw to show. Please advise what I should do to check out my system.

I should have mentioned:

6 100 amp hour Battleborn 3 pairs in series at 24 volts to bus bar.

Victron Multiplus

Cerbo with Touch

2 dc-dc converters (1 for 48 volt solar on roof to 24 volt and 1 to step down 24 volt to 12 volt for Airstream) 4 - 100 solar panels on roof in series for 48 volts.

Installed by professional in 2022 or 2023. new to me last month.

Thanks,

lxonline · January 5, 2026, 10:04am

Is the fuse ok on the shunt?

Check the one on the little red wire

Planenut · January 5, 2026, 1:01pm

I did look at the fuse and it appeared to be ok. I will check it with a meter later today to be certain. When I look at the smart shunt with my iPhone, It does show the battery as a percentage and the amp draw so I am leaning towards a cerbo problem. Maybe the surge reset the programming?

I had the a/c disconnected as I was double checking the battery draw and didn’t want it charging. However, the a/c input and draw are working as well as the dotted lines showing current direction..