Quote:
Originally Posted by 16ACE27
How do you know you can't disconnect the batteries from the buss when you have 120 VAC from SP or the generator? Have you measured the voltage at the batteries?
Are you relying on a simple LED indication that the DC buss has power>
Are you relying on the battery status indicator on the control panel that actually indicates DC buss voltage?
Run your house batteries down so the voltage at the batteries in under 12 VDC when no load is on the DC buss
Disconnect the batteries using your "Battery Disconnect" switch
Plug into shore power and measure the voltage at the batteries again.
If they haven't gone up to over 13 VDC then they are still NOT connected to the DC buss. Connecting them to the DC buss with your "Battery Disconnect" switch will push that voltage up over 13 VDC possibly up to 14 VDC.
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Not sure we communicating? I am not referencing a "battery disconnect switch", but the coach's chassis battery on/off switch. Maybe you call it the same thing? By contrast I do have installed a true aftermarket battery disconnect switch on my engine battery. I have never had to use but I just wanted to have.
So for right now I am only talking what comes standard from Thor USE/STORE switch and what comes standard on my Winnebago ON/OFF Switch.
You asked...
Are you relying on a simple LED indication that the DC buss has power>
Are you relying on the battery status indicator on the control panel that actually indicates DC buss voltage?
I am relying on DC voltage applied at points downstream of the Chassis batteries.
On my Coach; when the Switch LED is Green (On) everything has full VDC power. It does not matter if I have shore power connected or not. The vDC off the chassis battery does drop if no shore power; because the charger is NOT on as their is no power vAC.
However, on my coach 2019 Winnebago 29VE; if I have no shorepower and flip the Switch to (Off), With exception of the Kwikie Entry Steps; Everything vDC dies (including the Safe T Alarm Propane detector, and AGS). But if the Shorepower is turned back on, it ignores what you think you were doing with the switch last because the LED go green and all vDC is restored. This is what I like and view as perhaps different than Thor. If Thor had, there would be fewer accidental dead batteries because a RV owner forgot or did not know to put switch in USE mode when they assume it would be charging because the had shorepower.
I view as poke-yoke or fail safe because in short, I can ONLY disconnect my Chassis batteries (turn that Switch to Off); when there is no vAC being supplied. And when I do turn it Off, there is no draw. I suspect Kwikie steps may be pulling from Engine battery. I would have to check on that.
I hope this all makes sense. I spent almost 18 months studying and learning Thor and wound up with Winnebago; so I occasionally confuse myself. Of the two processes, IMO the ON/OFF concept is more user friendly for the layman RV owner than the USE/STORE concept.
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