Jayco Seneca Battery Drain

[OldSarge]

I have a 2018 Jayco Seneca Super C which is in storage at the moment. I went over the other day to check on it and the battery was dead. I "jumped" it and started it and left it running. After 2 days I went back and the same issue, dead as a door nail.

Anyone have any suggestions/advice on what may be causing this and what I need to do to keep a charge, short of buying a new battery?

Thankss

[EA37TS]

Are the house batteries draining as well or only the coach batteries?

[OldSarge]

Originally Posted by EA37TS

Are the house batteries draining as well or only the coach batteries?

Thanks for the response. It appears all batteries are dead. We are unable to get anything to run inside until the coach has been started

[GHen]

My batteries never last more than a couple weeks even with the factory battery disconnect. I installed a disconnect at the battery to completely disconnect them while my unit is in storage.
At home I have battery tenders on my classic cars to prevent damage to my car batteries, but you need power.
If no power is available you either need solar panels to maintain the batteries or disconnect your batteries until you use the rig again. If you expect snow, the solar panels will not work, you need to disconnect the batteries.
I need to reset my clocks, a minor inconvenience compared to the cost of replacing the batteries. Cats have nine lives, a battery has just a couple if they get fully discharged. Anything under 50% (12.2 v) is a death sentence.

[Mnwelsh]

I shut off the house power, turn the inverter off in the basement, lock everything
Up and park it. I’ve let it sit for 60 o 70 days without use several times and I’ve never had any battery issues.

[CAG]

This may be obvious, and something you did but, do you have a battery disconnect and are you turning it off when you leave?

If you have a disconnect and it is on, parasitics will drain the house battery. Not sure why the coach battery would be drained but if there is something there that is left on such at radio readout etc. it could drain that also.

[RVgoing]

I just made a post with some wiring diagrams. It has Seneca drawings as well.
I had the same issue in a Redhawk, I had a night light plugged in, in the bedroom, (on the 120v side)
This thing came on every night, keep in mind I'm not plugged into shore power, once I unplugged it my chassis battery drain went away. Still trying to figure out how this thing was getting power ...

[Jerplus4]

Anyone know where the disconnect is on the Seneca for chasis battery?

[75462]

Originally Posted by Jerplus4

Anyone know where the disconnect is on the Seneca for chasis battery?

On the 2020, just forward of battery tray. You will need very long arms to reach it.

[Mark S]

I replaced the chassis batteries on my 2018 Seneca TS last summer. The 2018 chassis were built in early 2017, so the batteries are close to four years old. Either have batteries tested and/or replace.

Also, in my experience, once a battery is drained all the way down, its life is over.

[Scott townley]

do all the senecas have this chassis battery disconnect?? Thanks