Battery decay

[FollowTheSun]

Originally Posted by pelikan61

That makes a whole lot of sense. Appointment is on the 6th off July, is it something easily swapped? If so, I’ll do it myself.
Thanks for the info.

The isolation relay could be easily replaced, but it may not actually be defective. There is a part of your description causing me to suspect that that the isolation relay is always energized (causing batteries to discharge) due to either: 1) a manufacturing mistake, or 2) a defective relay or switch associated with your ignition system keeping the isolation relay energized. I demerit the first idea because that would have been impossible for a dealer to ignore. I think the second idea more likely simply because all was good for while, then something went bad. Additionally, the first idea would be repaired by Isata; the second belongs to Mercedes, and may be more complicated to repair. If you have warranty – use it!

[pelikan61]

Will do, everything under warranty. I’m pretty sure this has been the case since day one. I took possession on March 12th 2021.

[bclemens]

Also make sure when NOT connected to power that your fridge is on LP. If you have the 2000 watt inverter, I think we inverted all of the plugs. I am not sure if we inverted the fridge plug (I did not think so), but if we did, it could be running in electric mode and that could run down the batteries quickly.

You did not say how long it took for the batteries to get to that point? So are they drawing down too quickly or is your concern just that they are drawing down at the same rate.

[pelikan61]

Yes confirmed the fridge is set to LP.

At this point, I think my main concern is the chassis battery draining in parallel with the house batteries.

It takes approximately two days. During one of my conversations with ReLion, they thought perhaps I may have a parasitic draw. I will have all that looked into on 6th of July when I take it in.