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kladner · 03-21-2020, 11:50 AM

I did an update this morning and did a power cycle twice. Hopefully that will do it.

kladner · 03-21-2020, 11:52 AM

Quote:

Originally Posted by twinboat

Try unplugging the battery temp sensor ( BTS ) from the inverter/charger. Small phone jack on it.

Sometimes they fail and the charger thinks the batteries are very hot, and drop the float voltages.

Unplugged, it defaults to 77° and if it was bad, it will normalize float charging.

Thanks I will try that next.

kladner · 03-21-2020, 06:49 PM

I went back out and found both saying not charging after a couple of hours. I power cycled everything and unplugged the BTS cord on both. It’s been a couple of hours and still on float.

kladner · 03-22-2020, 08:04 AM

This morning I found the voltage back down to 12.8. I downloaded the manual for the inverter and found that it may actually be performing as designed. (See page from manual below). It states that it will only float charge for 4 hours and then go to “Full Charge Mode”. After the voltage drops to 12.7 it will then go back to float for 4 hours. So I turned on all the lighting and watched until it hit 12.7 and immediately it started float charging again.
Thanks

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twinboat · 03-22-2020, 09:35 AM

Says that setting is for flooded and gel batteries.

Don't you have AGM batteries ?

I also wonder if your charge bridge ( isolation solenoid, BIRD, BIM ), that maintains your chassis battery, is going to work at 12.6 volts. Most only work above 13 volts.

kladner · 03-22-2020, 09:45 AM

Quote:

Originally Posted by twinboat

Says that setting is for flooded and gel batteries.

Don't you have AGM batteries ?

I also wonder if your charge bridge ( isolation solenoid, BIRD, BIM ), that maintains your chassis battery, is going to work at 12.6 volts. Most only work above 13 volts.

I read it to be Gel/AGM. I’m not sure what is going on with the chassis battery. Yesterday it was over 13 volts.

kladner · 03-22-2020, 11:48 AM

Anyone know where the charge bridge is? I didn’t see it near the batteries.

LWBAZ · 03-22-2020, 10:46 PM

Quote:

Originally Posted by kladner

Anyone know where the charge bridge is? I didn’t see it near the batteries.

On our 2018, it's behind a carpeted panel, last basement storage compartment before the compartment that houses the holding tanks, passenger side of the coach.

That said, if you're seeing chassis voltage of 13 you can be pretty certain your BIM (Battery Isolation Manager) is working.