Reply
 
Thread Tools Display Modes
Old 01-06-2011, 11:16 PM   #11
Senior Member
 
jsutherl's Avatar
 
Join Date: Nov 2010
Posts: 312
Oh and right now I'm testing the old batteries (installed in March, 2010) and it looks like one of the two jars has a shorted cell. No wonder I didn't have much battery capacity.
__________________

__________________
2008 Georgetown SE 350DS BunkHouse
jsutherl is offline   Reply With Quote
Old 01-07-2011, 09:54 AM   #12
Senior Member
 
ronhanson's Avatar
 
Join Date: Jun 2009
Location: Colorado
Posts: 322
Excellent mod!
__________________

__________________
Ron Hanson
2009 Georgetown 350TS (bunks)
400W solar, 440AH 6V GC2
2009 Ford Edge AWD Ltd towed
2011 Honda Fit Sport towed
ronhanson is offline   Reply With Quote
Old 01-07-2011, 10:33 AM   #13
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
I noticed there are no drain holes. Won't water (and road salt) collect there and rot out the trays? I would hate to see your batteries fall out one day.
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 01-07-2011, 12:40 PM   #14
Senior Member
 
jsutherl's Avatar
 
Join Date: Nov 2010
Posts: 312
Quote:
Originally Posted by herk7769 View Post
I noticed there are no drain holes. Won't water (and road salt) collect there and rot out the trays? I would hate to see your batteries fall out one day.
Very good point. You can't see it in the pictures but there is a gap under each cross-bar and an open slot at each of the four corners of the tray so water can drain.

I will also need to paint everything. But it's too cold right now. So it'll have to ride with no paint util spring, then I'll wire brush it all and hit it with rustolium. I plan to do that to the frame anyway.
__________________
2008 Georgetown SE 350DS BunkHouse
jsutherl is offline   Reply With Quote
Old 01-07-2011, 01:14 PM   #15
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
Then you thought of everything. Good job by the way.
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 01-07-2011, 11:02 PM   #16
Senior Member
 
jsutherl's Avatar
 
Join Date: Nov 2010
Posts: 312
Put the batteries on the tray today. Wow am I sore! Also wired everything up, all works great.

The good news:
Old battery capacity: 110Ah (20hr rate)
New battery capacity: 536Ah (20hr rate)

The bad news:
Old battery bank weight: 108lbs
New battery bank weight: 400lbs
** Not including tray

So why did I use such heavy batteries? Well I already had them so they where free. Four Torjan T-145's which would have given me 520Ah for only 288lbs. But those four batteries would have cost me ~$800. So free won out over weight.

On the other hand there is no maintenance with the batteries I installed.
Attached Thumbnails
Click image for larger version

Name:	IMAG0074.jpg
Views:	77
Size:	53.7 KB
ID:	4169   Click image for larger version

Name:	IMG_2689.jpg
Views:	85
Size:	55.6 KB
ID:	4170  
__________________
2008 Georgetown SE 350DS BunkHouse
jsutherl is offline   Reply With Quote
Old 01-08-2011, 07:32 AM   #17
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
Excellent job wiring it up too. Very neat installation and correctly wired (House + to one battery and house - to the last one in the bank).
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 01-08-2011, 12:24 PM   #18
Senior Member
 
f150k's Avatar
 
Join Date: Aug 2010
Posts: 180
I have two 12 volt batteries in our 5th wheel. They are on either side of the front storage bay, each positive lead goes to a single post ( same post) on a 30 amp circuit breaker and than to a disconnect switch and than on into the camper system. Both batteries negative cables are grounded to the camper chassis, is this ok or should they have run the wiring some other way?
__________________
f150k is offline   Reply With Quote
Old 01-08-2011, 01:30 PM   #19
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
Quote:
Originally Posted by f150k View Post
I have two 12 volt batteries in our 5th wheel. They are on either side of the front storage bay, each positive lead goes to a single post ( same post) on a 30 amp circuit breaker and than to a disconnect switch and than on into the camper system. Both batteries negative cables are grounded to the camper chassis, is this ok or should they have run the wiring some other way?
To ensure even charging and discharging, the total resistance (wires and internal resistance) from the charging source to the positive terminal of the battery bank; through the bank (or cell) to the negative terminal; to Frame Ground must be identical. Now, in your setup the split to the two batteries begins at the post of the 30 amp breaker (CB) and ends at the Frame.

In order to keep the current flow to the two batteries identical the wire lengths from the CB post to each battery must be equal and the length of the ground wires from the ground battery post to the frame must be equal.

Since your system has two different grounds, you must be very diligent to make sure the ground connections of both batteries are good. Rust can increase resistance at the ground connection and isolate one of the batteries without any indication to you (except decreased capacity). It will just work the "good ground" battery much harder while allowing the other to "loaf."

While all that may not seem like a big deal, remember that deep cycle battery life is determined by the number and depth of each charge/discharge cycle. If one battery is being discharged deeper than the other continuously, that battery will need replacement before the other one. Since they much be switched out in sets, you will not get full usage out of the "loafing" battery".

You might think you can rotate the batteries through the two "stations" but once they get "out of sync" the weaker battery will continue to be over worked and the stronger one will continue to loaf due to increased internal resistance in the weak battery.

Whew... mud?
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 01-08-2011, 02:25 PM   #20
Senior Member
 
f150k's Avatar
 
Join Date: Aug 2010
Posts: 180
Lou thank you, Ok let me see if I have this right. 1st can I keep the batteries in their present location or should I move them? 2nd could I remove the one cable from the 30 amp breaker and run it to the positive post on the other battery and also the same with the negative and then to chassis ground. Or should I move the battery next to each other, hook the positive to positive and than to the disconnect switch, and the same with the negative side,than to ground. All I would have to do is plug the vent for the one side of the cargo bay and hook the two in one vent if I move the batteries.
__________________

__________________
f150k is offline   Reply With Quote
Reply

Tags
georgetown, battery

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 Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 04:00 AM.