This is going to be embarrassing, but here goes.
Just replaced my 4 ea. 6V AGM battery bank with a new 4 ea. 12V Lithium battery bank -- and added a BMV-712 battery monitor. I was pretty sure I only needed a single battery bank shutoff switch to completely isolate the battery bank from my 12 volt loads. But after I completed the install, I tested the shutoff switch by switching it off (along with my solar circuit breakers and inverter/charger on/off switch), then monitored the current draw via the BMV-712 monitor.
With all switches off, the monitor was showing a current load of 4.8 amps! Time remaining on my fully charged Lithium bank: around 4 days.
Here's a simplified block diagram of my system:
SimplifiedElectrical.pdf
(Not shown on the diagram is the 12V circuit between the battery and the BMV-712. But the manual says that load is milliamps, not amps.)
I don't know how the BMV-712 could be seeing a load with all switches off.
The only thing I can guess is the inverter/charger is not working like I thought.
Is my problem obvious to anyone?
Thanks.
-Steve
Just replaced my 4 ea. 6V AGM battery bank with a new 4 ea. 12V Lithium battery bank -- and added a BMV-712 battery monitor. I was pretty sure I only needed a single battery bank shutoff switch to completely isolate the battery bank from my 12 volt loads. But after I completed the install, I tested the shutoff switch by switching it off (along with my solar circuit breakers and inverter/charger on/off switch), then monitored the current draw via the BMV-712 monitor.
With all switches off, the monitor was showing a current load of 4.8 amps! Time remaining on my fully charged Lithium bank: around 4 days.
Here's a simplified block diagram of my system:
SimplifiedElectrical.pdf
(Not shown on the diagram is the 12V circuit between the battery and the BMV-712. But the manual says that load is milliamps, not amps.)
I don't know how the BMV-712 could be seeing a load with all switches off.
The only thing I can guess is the inverter/charger is not working like I thought.
Is my problem obvious to anyone?
Thanks.
-Steve
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