I have a 2021 Ventana 4369. I recently upgraded my house batteries to lithium. Now I am trying to swap the current Precision Circuits BIM 225 with the equivalent LI-BIM 225.
Problem is the standard lead acid BIM battery terminals in the coach now are labeled Batt A and Batt B. Do these non-descript names mean it does not matter which post is connected to chassis vs coach? The reason I ask is because the LI-BIM battery posts on the one I am installing are specifically labeled Chasis and Coach. In the case of the LI-BIM it makes a difference and reversing them would result in improper charging.
When I look at this wiring diagram…
It specifically shows the chassis on Batt A and the coach on Batt B. When I measure the voltage on each of the battery lugs on my coach, the voltage on Batt A matches the coach and the voltage on Batt B matches the chassis. This is reversed according to the schematic.
I am a newb when it comes to RVs but am a big time DIYer with all sorts of things. I am hoping the more experienced on this site can help me sort it out and get it right. My wife and I just retired and are full timing it to see the country. Since this is our home I figured I should err on the side of caution and ask here before I mess it up.
Any help is greatly appreciated.