12 Volt System Shutting Down

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   Hello,
We have a 2014 Hanse 415. We had 3 new 100Ah Battleborn Lithium batteries installed in May, along with 2 Victron DC to DC chargers. Worked beautifully all summer. We also have a bank of 3 solar panels and two mppt charge controllers.

We left for a weekend cruise on Friday and when leaving dock, we deployed the bow thruster, but the prop would not work, just a clicking noise from down in the salon. We assumed there might be a stick or something jamming the prop so we retracted it and carried on.

Here is a summary of what happened when we arrived at anchorage:
throttled down to anchor
ran the windlass to drop anchor
chart plotter shut down (i turned it back on, then it shut down again)
set anchor and shut down engine.
All 12 volt electrics turned off. (lights, fridge etc)
Restarted engine no problem, but engine room fan did not come on during starting sequence. 
12 volt panel showed house batteries at low voltage, then on its own, the voltage started to rise back up to full voltage and xantrex monitor showed batteries at 100% (this happened in about 10 seconds)
panel reset and we turned lights and fridge back on.
After 10 min, system shut down again, and restarted the same way after a few minutes and was stable for awhile.
Turned on inverter to plug in an overnight appliance and system shut down again.
So, when the system was under a higher load than just lights and fridge (electric toilit, elec winch, etc, system shut down. When leaving the anchorage, the windlass would not lift the anchor with engine in low idle. Had to put in neutral and rev up to lift anchor. Returned home, batteries were 100%. When shore power was plugged in, and charger turned on, winch worked etc, but not with charger off.

I replaced the bow thruster fuse which looked discoloured but not broken. checked all the fuses. All look fine. A very reputable company did the Lithium install out of Vancouver. I will be contacting them this week but they don't travel to where I live.

Any advice is appreciated.

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plorette Members Profile Send Private Message Find Members Posts Add to Buddy List Sub Lieutenant Joined: 16 May 2020 Location: Squamish, BC Status: Offline Points: 5	Post Options Post Reply Quote plorette Report Post Thanks(0) Quote Reply Topic: 12 Volt System Shutting Down Posted: 02 October 2022 at 18:19
	Hello, We have a 2014 Hanse 415. We had 3 new 100Ah Battleborn Lithium batteries installed in May, along with 2 Victron DC to DC chargers. Worked beautifully all summer. We also have a bank of 3 solar panels and two mppt charge controllers. We left for a weekend cruise on Friday and when leaving dock, we deployed the bow thruster, but the prop would not work, just a clicking noise from down in the salon. We assumed there might be a stick or something jamming the prop so we retracted it and carried on. Here is a summary of what happened when we arrived at anchorage: throttled down to anchor ran the windlass to drop anchor chart plotter shut down (i turned it back on, then it shut down again) set anchor and shut down engine. All 12 volt electrics turned off. (lights, fridge etc) Restarted engine no problem, but engine room fan did not come on during starting sequence. 12 volt panel showed house batteries at low voltage, then on its own, the voltage started to rise back up to full voltage and xantrex monitor showed batteries at 100% (this happened in about 10 seconds) panel reset and we turned lights and fridge back on. After 10 min, system shut down again, and restarted the same way after a few minutes and was stable for awhile. Turned on inverter to plug in an overnight appliance and system shut down again. So, when the system was under a higher load than just lights and fridge (electric toilit, elec winch, etc, system shut down. When leaving the anchorage, the windlass would not lift the anchor with engine in low idle. Had to put in neutral and rev up to lift anchor. Returned home, batteries were 100%. When shore power was plugged in, and charger turned on, winch worked etc, but not with charger off. I replaced the bow thruster fuse which looked discoloured but not broken. checked all the fuses. All look fine. A very reputable company did the Lithium install out of Vancouver. I will be contacting them this week but they don't travel to where I live. Any advice is appreciated.

Ian Coverdale Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 19 June 2019 Location: Travelling Status: Offline Points: 311	Post Options Post Reply Quote Ian Coverdale Report Post Thanks(0) Quote Reply Posted: 02 October 2022 at 21:09
	Your lithium batteries have gone into shutdown, are isolated or main battery fuse has blown. Likely any voltage you see is coming through solar or other charge system. Lithium batteries will shutdown if cold (usually <5C) or you have exceeded maximum current draw. I do not know enough about Battleborn system to know parameters for shutdown or how to restore them to normal. Suggest you disconnect one lead from a battery and measure voltage on battery terminals ... if zero, batteries are definitely in shutdown. Cheers.
	Ian & Andrea SV Gabrielle (H445) Liveaboards - currently Montenegro. www.facebook.com/sailinggabrielle

plorette Members Profile Send Private Message Find Members Posts Add to Buddy List Sub Lieutenant Joined: 16 May 2020 Location: Squamish, BC Status: Offline Points: 5	Post Options Post Reply Quote plorette Report Post Thanks(0) Quote Reply Posted: 03 October 2022 at 00:38
	Thanks for the reply Ian, I had some help from a boat neighbour at our marina who helped me trouble shoot the problem. We isolated the voltage drop to the shunt. I had some corrosion on the main wire connection on the shunt on the load side. Cleaning the contact fixed the problem and all is good. Thanks again.



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