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36v battery bank

Hooked up MakeSkyBlue V119 to my 36v battery bank and get E65 and fault. Any ideas on a fix? Have changed wiring, 8 awg from controller to breaker, 8 awg from breaker to batteries. Don't have solar panels hooked up yet. Will be running 10 awg from panels to disconnect and from disconnect to breaker and then controller. HELP, very frustrating.

Thanks,

Tim

please check the connections between the controller and battery bank.

Also what is the battery bank voltage at the post and the controller terminals?

 

Thanks

Sean

Sean,

39 volts at battery, 38.8 volts at controller

So, the controller is somehow thinking its a 48V bank and its showing E65.

ITs best to start the controller with a 36V bank voltage and leave the controller on..

Thanks

sean

Sean,

Not exactly sure what you are saying to do? How do I start the controller with 36v bank voltage, I thought it was supposed to automatically sense the voltage.

I did a 36 volt golf cart with MSB 60 amp, and 1,500 watt inverter, the "fault" error always comes on during charge, but does not seem to effect the production at all.  I assumed it was because only 3-100 watt, 12 volt (vmp), 20 voc, panels in series is bairly high enough voltage, and MSB doesn't like being at voltage, prefers double battery bank .  But as I said, it doesn't effect the performance at all, I'm starting to think, its just an odd voltage that is hard for any controller to include in standard 12/24/48 volt systems, this is why they don't make 36 volt ,,,, anything anymore.

Here is my youtube video on it, where I assumed it was the reverse gear, being just a reverse polarity electrical system the MSB picks up.  But as I say, it doesn't effect anything and works good regardless.

Quote from thigg001 on November 30, 2020, 1:26 pm

Sean,

Not exactly sure what you are saying to do? How do I start the controller with 36v bank voltage, I thought it was supposed to automatically sense the voltage.

It does, but being an odd voltage, it seems to just shut down when the tracking starts moving more like its on a 48 volt system.  Notice in the manual, both 36 volt and 48 volt claim a 160 voc max.  So imagine how that can be.  It can't.  They must have just made the programming shut down, restart when it gets  out of 36 volt optimized range.  That would explain it. I'm just glad I even found a controller for 36 volt that didn't destroy my clients bank account.  Its a specialty item it seems.  So rarely used.