Jayco RV Owners Forum

Thread Tools Display Modes
Old 05-17-2015, 09:46 PM   #1
Junior Member
Join Date: May 2015
Location: New Smyrna Beach
Posts: 1
Class C battery drain 2015 Greyhawk

We have a 2015 Greyhawk 29MV. Dry camped for the first time this past weekend in the new motorhome. We used to have a 2005 Jayfeather travel trailer and could dry camp for about three to four days before the battery died (2 adults, judicious power usage, fridge on LP). Now the brand new battery is lasting for a maximum of 8 hours with the same exact usage before we have to fire up the on-board generator. We keep lights off, run water pump minimally, keep the converter off and the 8 hours was on a no shower day (heat or a/c not run at all). Is this normal for a class C? Dealer says that in a Class C there are other things running behind the scenes that we don't realize draw power (little fan behind fuse box, etc.). Never having had a Class C before, we don't know if this is normal or not. Can anyone chime in on what their battery life is like?

gotobednow is offline   Reply With Quote
Old 05-17-2015, 09:51 PM   #2
Senior Member
reitrof's Avatar
Join Date: Dec 2011
Location: Ottawa
Posts: 360
Sounds about right. There is only 1 battery for the coach, older jayco's used to have 2. Some people have added an extra battery, you can look for those posts.

If you don't already have you can switch out the halogen lights for LED's, I did that and it makes a difference.


2012 Greyhawk 31 FK
Flat towing a 2008 Miata.
reitrof is offline   Reply With Quote
Old 05-17-2015, 10:08 PM   #3
Senior Member
hoppers4's Avatar
Join Date: Mar 2015
Location: Port Orchard
Posts: 1,170
I also have a 29MV. Actually, that's quite disappointing that you can only get 8 hours of battery with judicious use. I've haven't tried dry camping yet, but 8 hours sure doesn't seem like much. The fan the dealer is talking about is in the converter which isn't running unless you're on shore power. The converter charges the battery. How about your inverter? Is it off? TVs can also suck a bit of juice.
hoppers4 is offline   Reply With Quote
Old 05-17-2015, 11:04 PM   #4
Senior Member
oldmanAZ's Avatar
Join Date: Dec 2014
Location: AZ
Posts: 7,067
Originally Posted by gotobednow View Post
We have a 2015 Greyhawk 29MV. snip...
Congratulations on the new Greyhawk and welcome to the forum.
Sherm & Terry w/rescues Eydie (min Schnauzer) Steve RIP (std Poodle)
2015 Jay Flight 27RLS (Camped: 102 nights '15, 90 nights '16, 70 nights '17 so far)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.
oldmanAZ is offline   Reply With Quote
Old 05-18-2015, 12:27 AM   #5
Senior Member
Bluesky46's Avatar
Join Date: Feb 2013
Location: Moses Lake
Posts: 228
Have never gone dry long enough to run down the coach battery, but I would be surprised to get more than 8 hours without charging. My Greyhawk only has one coach battery. And, yes, like Reitrof said, switching your lights to LED's is good. Especially those that you use often. Do you turn off your audio/navi? On mine, that is on, using bettery until you turn if off, even if the ignition is off.
Bluesky46 is offline   Reply With Quote
Old 05-18-2015, 05:22 AM   #6
Senior Member
Join Date: Oct 2014
Location: Western NY
Posts: 227
There was a post a while back about the dash radio draw. It was said, to the best of my recollection, that it takes its power off the house battery. This is apparent when you shut the main power switch off and that red light on the dash radio finally goes dark. That two could be one of your powertrains behind the scene.
'16 Coachmen Mirada 35BH

Formerly 31FK 15 Grayhawk
Toad: 2015 Jeep Cherokee "The Caboose".

Taking in the sights wherever my Trolley takes me!
WDW is offline   Reply With Quote
Old 05-18-2015, 06:59 AM   #7
Junior Member
Join Date: May 2015
Location: Lancaster
Posts: 4
I have your answer to your battery drain problem. I had the same problem with my Jayco class C. I have a gas detector located just inside the door at the base of the fridge. That gas detector is connected to the engine battery. It draws a lot of power from the battery. After a few days of camping my engine battery was dead. I had to hit the emergency start switch to get going. The engine battery does not charge when connected to the campground power. Also I have a removable AM FM radio that draws power if not removed when engine is not running.
My problem was with the engine battery. Yours is with the coach battery. Check to see if you have a gas detector and turn it off. Replace it with a 9 volt battery portable detector. This solved my problem.

toolman is offline   Reply With Quote

battery, battery drain, battery life, class c, greyhawk

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 10:31 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.