Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 07-31-2018, 04:46 PM   #1
Senior Member
 
Join Date: Nov 2017
Location: Los angeles
Posts: 131
Greyhawk Original Battery

This is a question for Greyhawk owners who only use their originally installed 12V battery. How have you found traveling with only one house battery? How has it impacted you're use of your RV? Has any impact been negligible because of the fact that you have a generator?
__________________

Jaytalk is offline   Reply With Quote
Old 07-31-2018, 04:59 PM   #2
Senior Member
 
Camper_bob's Avatar
 
Join Date: Sep 2013
Location: South Texas
Posts: 4,771
Our Greyhawk still has the original battery and I'm almost positive it has been completely discharged at least once. The first time we looked at it and test drove it, I'm pretty sure the house battery was completely dead.

As far as how that has affected our usage, it has not. At least not yet. We almost exclusively camp where we have access to shore power. When we are running down the road, we are running the generator to keep the ACs running. When we are without shore power, we are running the ACs on the generator.

So, here's my caveat: we haven't owned our MH long enough to get an idea of how we'll travel in the cooler months. It is entirely possible that we will depend more on the 12V system when it gets cold, to avoid running the generator if nothing else. We used almost a half tank of fuel last time we were out at the beach, and the generator ran non-stop the entire weekend (2 nights, and about 2-1/2 days of actual camping).

FWIW, I measured my house as well as my chassis battery after the MH had been sitting in storage for about two weeks and I got 12.54V on the house, and 12.30V on the chassis. I took the measurements the moment I walked up to the unit. We store it with the master 12V switch in the off position, but that's all we do to store it. I don't have any access to power, including solar float chargers, in storage, so those measurements are from the unit just sitting dead in the lot for about 2 weeks.

I will be replacing both batteries with AGM units in the near future. One reason for that is that I will now need to run 2 CPAP machines each night...
__________________

__________________

-2018 Greyhawk 29MV
-1997 Jeep Wrangler YJ (Toad)
-2015 Jeep Grand Cherokee Limited (Soon to be Toad)
-2014 Jay Flight 28BHBE & Ram 2500 6.4L CC 4x4 (sold)
Camper_bob is offline   Reply With Quote
Old 07-31-2018, 06:25 PM   #3
Senior Member
 
Bullitt6283's Avatar
 
Join Date: Jul 2017
Location: New Freedom, PA
Posts: 184
Dry camping at NASCAR races and running the generator to charge up the single size 27 battery before retiring at night....

When either running the propane heat at night, or after running the water pump (and water heater) for 2 showers in the morning, I get an error code on the reefer (which was running on propane) complaining that the DC voltage is too low. Part of the problem, I think, is that the DC wiring in the coach is a bit small and the voltage drop is causing the reefer error code.

I'd like to mount a 2nd battery, but I need to figure out how/where to put it.
My main worry is that the battery may get too low to start the genny.
__________________
2016 Greyhawk 29MV
Retired
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Bullitt6283 is offline   Reply With Quote
Old 07-31-2018, 07:08 PM   #4
Senior Member
 
Join Date: Nov 2017
Location: Los angeles
Posts: 131
Camper_bob,

Thanks for your comprehensive response. Just one question, why would you replace the car battery with a AGM battery? I understand replacing the house battery with the AGM; I will probably do that too after years worth of use.
Jaytalk is offline   Reply With Quote
Old 07-31-2018, 07:14 PM   #5
Junior Member
 
Steveii's Avatar
 
Join Date: Apr 2016
Location: Stockbridge
Posts: 25
My battery is pretty much dead all the time. If you needed to soley use the battery as your only power option it would be an issue. You would probably need to add an additional battery and have some solar to keep them charged. Even with that I don't think they would last very long running heat or AC. Just drawing too much power for these batteries to keep up. Just lights you might be okay.
__________________
2016 Greyhawk 31FS
Steveii is offline   Reply With Quote
Old 07-31-2018, 07:18 PM   #6
Senior Member
 
Join Date: Nov 2017
Location: Los angeles
Posts: 131
Quote:
Originally Posted by Bullitt6283 View Post
Dry camping at NASCAR races and running the generator to charge up the single size 27 battery before retiring at night....

When either running the propane heat at night, or after running the water pump (and water heater) for 2 showers in the morning, I get an error code on the reefer (which was running on propane) complaining that the DC voltage is too low. Part of the problem, I think, is that the DC wiring in the coach is a bit small and the voltage drop is causing the reefer error code.

I'd like to mount a 2nd battery, but I need to figure out how/where to put it.
My main worry is that the battery may get too low to start the genny.
That's an interesting thought! So are you saying that if the house battery is completely dead the generator will not start? Does anyone else know if that is in fact the case?
Jaytalk is offline   Reply With Quote
Old 07-31-2018, 07:39 PM   #7
Junior Member
 
Steveii's Avatar
 
Join Date: Apr 2016
Location: Stockbridge
Posts: 25
Quote:
Originally Posted by Jaytalk View Post
That's an interesting thought! So are you saying that if the house battery is completely dead the generator will not start? Does anyone else know if that is in fact the case?
Mine won't start up if it's dead. Have to start the motor up then the generator will start.
__________________
2016 Greyhawk 31FS
Steveii is offline   Reply With Quote
Old 07-31-2018, 08:27 PM   #8
Senior Member
 
cabinetmaker's Avatar
 
Join Date: Mar 2018
Location: Granbury
Posts: 805
Running down the road the alternator from the chassis will keep the coach battery charging.

Your slides, jacks and awning use the coach battery. Those draw a lot of juice. Greyhawk manual recommends shore power be connected or generator be running when slides are used so converter can supplement the battery.

AGM is on my list!
cabinetmaker is offline   Reply With Quote
Old 08-01-2018, 07:21 AM   #9
Senior Member
 
Bullitt6283's Avatar
 
Join Date: Jul 2017
Location: New Freedom, PA
Posts: 184
Quote:
Originally Posted by Jaytalk View Post
That's an interesting thought! So are you saying that if the house battery is completely dead the generator will not start? Does anyone else know if that is in fact the case?
Quote:
Originally Posted by Steveii View Post
Mine won't start up if it's dead. Have to start the motor up then the generator will start.
More on point, when you start up the vehicle engine the battery isolation solenoid kicks in and connects the coach battery to the chassis battery via a heavy-gauge wire.
I am assuming that the aux start switch, which is used to help start the vehicle engine using the coach battery, could also be used to start the generator by borrowing power from the chassis battery.
__________________
2016 Greyhawk 29MV
Retired
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Bullitt6283 is offline   Reply With Quote
Old 08-01-2018, 07:27 AM   #10
Senior Member
 
Bullitt6283's Avatar
 
Join Date: Jul 2017
Location: New Freedom, PA
Posts: 184
Quote:
Originally Posted by Jaytalk View Post
....why would you replace the car battery with a AGM battery? I understand replacing the house battery with the AGM; I will probably do that too after years worth of use.
When the vehicle is running, the chassis battery and the coach battery are connected together thru the isolation solenoid and heavy wire. There are varying opinions whether it is good to tie different types of batteries together.

https://www.optimabatteries.com/en-u...eries-parallel


.
__________________

__________________
2016 Greyhawk 29MV
Retired
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Bullitt6283 is offline   Reply With Quote
Reply

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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Jayco, Inc. or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 12:57 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.