Reply
 
Thread Tools Display Modes
Old 01-25-2011, 09:01 AM   #1
Senior Member
 
Join Date: Dec 2010
Posts: 517
Send a message via Skype™ to scubieman
How much and where did you get your batteries?

I am looking to move from the stock battery to 6 volt at least 400 aH.

just Wondering where you bought them and how much?
__________________

__________________
2009 Dodge Ram Mega Cab 2500 6.7 cummins
2011 Forest River Cherokee 28BHKS

scubieman is offline   Reply With Quote
Old 02-02-2011, 03:46 PM   #2
CampeRooo
 
rthrbelsewhere's Avatar
 
Join Date: Sep 2008
Location: Colorado
Posts: 454
I've been planning to do the same once my 12v goes belly up and I don't know everything there is about 6-v brands, but I've read over and over that Trojan batteries are the way to go. They're more expensive then most, but many swear by them and say that they outlast the less expensive "large retailer" type 6-volt batteries. One place i've been looking is on craigslist to see if anyone has any used ones for sale. Sometimes you can get a much better deal if you know how to test them.... see step 6 here - Battery Tutorial

We'll see what's available once I am ready...til then, research!

Joe
__________________

__________________
Where we've been:

2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP
rthrbelsewhere is offline   Reply With Quote
Old 02-05-2011, 10:52 AM   #3
CampeRooo
 
rthrbelsewhere's Avatar
 
Join Date: Sep 2008
Location: Colorado
Posts: 454
To follow up with this, here's the Trojan battery that I referred to above. Reference - Trojan Battery Company I believe 2 of these would give you the 400aH rating that you're looking for without a whole lot more weight.
__________________
Where we've been:

2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP
rthrbelsewhere is offline   Reply With Quote
Old 02-05-2011, 01:11 PM   #4
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,157
Remember to compare Apples to Apples. The AH rating (if not listed otherwise) is for 20 hours. So these batteries are rated at 240 AH for 20 hours. Two of them in series to get 12 volts will not increase the capacity to 480; it will stay at 240. This is very respectable and will most likely be my next upgrade when my two 12 volt 75 AH/20 hours (each - 150 total) bank needs replacing.
__________________

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 02-05-2011, 01:26 PM   #5
CampeRooo
 
rthrbelsewhere's Avatar
 
Join Date: Sep 2008
Location: Colorado
Posts: 454
Herk...you're right! I totally forgot about how the amp ratings don't change when connecting in series to make the 12 volts. Thank you for correcting that, he'll have to run 2 sets of 2, meaning 2 6 volt in series and then two pairs in parralel to make the 400 aH's he's looking for.

Also, I think you meant 240aH at 20 amps...not hours. One thing I noticed about battery ratings is that not all companies rate at 20 amp draw. You'll see either 25 amps or at 100 amp draws, which makes it difficult to compare side by side without recalculating their ratings. Anyway, thanks again for keeping me honest on my reply
__________________
Where we've been:

2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP
rthrbelsewhere is offline   Reply With Quote
Old 02-05-2011, 10:10 PM   #6
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,157
This will explain it better than I can.

Notes on Batteries

Awesome article.
__________________

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 02-05-2011, 10:26 PM   #7
CampeRooo
 
rthrbelsewhere's Avatar
 
Join Date: Sep 2008
Location: Colorado
Posts: 454
I think I just strained a brain cell
__________________
Where we've been:

2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP
rthrbelsewhere is offline   Reply With Quote
Old 02-06-2011, 08:42 AM   #8
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,157
This is a good article that explains why at high discharge rates your battery will last much less that the expected capacity would indicate.

How to calculate battery run-time when design equipment using batteries; Battery Technical Resources for Design Engineers from PowerStream

It is worthwhile to try and wrap your head (no matter how much it hurts) around the concept that HOW you discharge that battery and HOW DEEP you discharge it has a great effect on how long that initial charge will last.

Refilling it is a WHOLE different issue. There is a maximum amount of amperage available to the house power center to provide DC. The more house DC you use; the less is available to charge your batteries (Don't ask how I found out) So if you are using NO DC just AC while on your generator; the full (say) 20 amps available to charge your partially discharged battery will go to the battery. As the voltage of the battery recovers; the power center will start reducing to the less aggressive amps available.

So, if your are using the TV and your computer on INVERTER (ahem); while you are trying to charge the battery; less of those "available amps" will make it into the battery. Thus it could take FOREVER to recharge. By switching the inverter off and moving the power strip that was plugged into the inverter to a house outlet; the FULL DC amps being produced by the power center will make it into the battery and your recharge time (and generator usage) will be cut considerably.
__________________

__________________

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
Reply

Tags
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 07:01 PM.