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Old 08-17-2017, 09:31 AM   #11
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Location: Belleville, Ontario
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Okay if they are 12 volts then the parallel set up is correct. Sorry for the baffling comment. I wasn't sure, when I initially read your post, if you were using 6 or 12 volt batteries. As a trouble shooting idea, did you put the battery configuration back to the way it was to make sure your systems worked as before?

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Old 08-18-2017, 09:11 PM   #12
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Hi, Hope you get the issue figured out. I would like to do this mod as well. Did you add any additional support to the compartment where you added the batteries?

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Old 08-18-2017, 10:26 PM   #13
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I added a 1/2 plywood 27" x 16". You'll need it to attach tie down straps. The compartment has plenty of strength. I also used a 1 1/2" hole saw to cut 6 holes in each end. You need lots a ventilation for the possible hydrogen gas off. But, back to your original question. In a word...no. I had Jayco tech support (Ask for Mitch) send me schematics but still no answers. After 2 days of cussing and swearing, I finally waved the white flag. I've got a mobile RV tech coming over tomorrow. I'll keep you up to speed.
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Old 08-19-2017, 08:25 AM   #14
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Originally Posted by jdgmint View Post
I just finished adding a second battery to our Greyhawk. I put both batteries in the compartment next to the factory battery compartment.
I definitely don't want to hijack this thread, but being new to the Class C family (delivery of our 29MV in November 2017), I want to learn everything I can prior to the delivery. So, why the second battery? Do you do a lot of boondocking? Compared to our current 2013 TT which has one battery, I know there is a greater power draw from all the electrical systems in a Class C when sitting and not connected to shore power, like in a National Park where gennies are prohibited. Thank you!
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Old 08-19-2017, 11:24 AM   #15
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We spend time in the southern California desert. We want to run the generator as little as possible although during the day we have no choice... If we want AC. It gets very cool as night so battery power is ideal for most needs . Unless you are adept at electrical systems you might want to consult your dealer on the project.
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Old 08-19-2017, 01:26 PM   #16
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Join Date: May 2015
Location: Manchester
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btw....here is my 2 6v in my 2015 29mv

someone else asked for this a few months ago, sorry for the delay....works great....
Also a question, does anyone know where the transfer switch is on my Greyhawk 2015 29mv, for some reason I cannot get shorepower to connect anymore...no 110v. into my RV, generator on board supplies 110, but plugging into 110v. outlet does not.
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Old 08-19-2017, 01:42 PM   #17
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Mine is located under the bed, with the rest of the spaghetti.
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Old 08-19-2017, 07:20 PM   #18
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mine is under the bed too

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