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Old 04-11-2014, 01:18 PM   #11
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Quote:
Originally Posted by Seann45 View Post
In 6 years with my solar system I have never seen voltages in the 15.5 area. mine charge to 100% at 14.6. IF you camp off grid (boondock) pairs of 6's is the way to go.. IF you always stay in RV parks with electrical hookups then dont waste your money on 6's
I would be very curious to hear how you are determining 100% charge. A volt meter showing full charge for a 12vdc system is not full charge for a series 6 VDC to 12 VDC system.
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Old setup:
2004 Chevrolet Silverado 3500 LT with a 2004 Jayco JayFlight 29BHS
2014 Greyhawk 31FS with a 2007 Tahoe toad
New setup:
2014 Thor Palazzo 33.3 with a 2007 Tahoe toad
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Old 04-12-2014, 09:39 AM   #12
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Oh my... more homework!
Someday the dream will be solar, but until we have some more boondocking time under our belts, and I can get some real world experience with what we actually need for power....
I had thought about just a big Group 31 AGM, but started down the GC road after doing some more investigation. Guess the prudent thing to do is to wait till I can get it out of storage, so I can directly evaluate available space, current wiring, and review what I may/may not have for charging capability. Thank you all for the detailed answers!
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Old 04-12-2014, 11:18 AM   #13
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""""Oh my... more homework!""""


Don't forget the most important thing.... How long your batteries will last based on your camping lifestyle. Odds are that will have to be modified.. Depending on your system size, Lots of LEDS, turn it off if your not using it, charging your things during the day, watching your battery output.... but it all becomes second natured after awhile.
Would not be with out SOLAR!!!!
Don
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1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
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EnGenius WI-FI extender, D-Link wireless (n) modem
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Old 04-12-2014, 11:49 AM   #14
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Quote:
Originally Posted by msturtz View Post
A volt meter showing full charge for a 12vdc system is not full charge for a series 6 VDC to 12 VDC system.
Actually it is the same.

The cell voltage for each battery cell is 2.1VDC. So for a single 12volt battery or (2) 6volt batteries in series or (3) 4volt batteries in series, each battery cell is 2.1VDC. Here is the math...

(1) 12VDC Battery = 6 cells * 2.1VDC = 12.6VDC

(2) 6VDC Batteries in SERIES = (Bat#1.. 3 cells * 2.1VDC=6.3VDC) + ( Bat#2.. 3 cells * 2.1VDC=6.3VDC) = 12.6VDC

(3) 4VDC Batteries in SERIES = (Bat#1.. 2cells * 2.1VDC=4.2VDC) + ( Bat#2.. 2 cells * 2.1VDC=4.2VDC) + Bat#3.. 2 cells * 2.1VDC=4.2VDC)= 12.6VDC


The charge controller see a demand for 12.6 VDC and knows what to do!!

Everything works out.

Don
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2013 Jayco Eagle 284BHS
250Watt Grape Solar Panel, MorningStar MPPT 60 Charge Controller
1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
2 - AirSight Wireless IP Cameras (used as rear view cameras)
EnGenius WI-FI extender, D-Link wireless (n) modem
MagicJack Internet Phone
2012 Ford F150XLT, EcoBoost w/3.73
157" Wheel base, HD Towing Package

Our Solar Album https://www.jaycoowners.com/album.php?albumid=329
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Old 04-12-2014, 07:49 PM   #15
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Usually battery boxes for TT are either standard size series 24 or larger size series 27. Series 24 are typically around 9.6 x 14.2 x 10.7 inches while series 27 are 9.5 x 16.8 x 11 inches in size. My Jayco Eagle 338 rlts has room for one series 24 box and one series 27 box. The dealer installed a series 24 box and battery and I added a larger series 27 box and battery in parallel using #2 cables.
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Old 04-12-2014, 11:14 PM   #16
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I opted to purchase two group 31 VMTANKS http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1 batteries. Each battery is rated to 120 AH so two in parallel produces 240 AH. The notable difference is AGM batteries do not have the nearly the issues with the Peukert’s Law that flooded batteries do. Flooded batteries have a really bad problem with losing capacity the higher the amp draw. The VM Charge tanks battery I bought will fit in a the group 27 / 29 battery location in my Greyhawk. The VM Charge Tank batteries are slightly taller and longer and wider than the group 27 battery.
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Old setup:
2004 Chevrolet Silverado 3500 LT with a 2004 Jayco JayFlight 29BHS
2014 Greyhawk 31FS with a 2007 Tahoe toad
New setup:
2014 Thor Palazzo 33.3 with a 2007 Tahoe toad
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Old 04-13-2014, 02:30 PM   #17
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Nice!!
Let us know how they perform.

Don
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2013 Jayco Eagle 284BHS
250Watt Grape Solar Panel, MorningStar MPPT 60 Charge Controller
1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
2 - AirSight Wireless IP Cameras (used as rear view cameras)
EnGenius WI-FI extender, D-Link wireless (n) modem
MagicJack Internet Phone
2012 Ford F150XLT, EcoBoost w/3.73
157" Wheel base, HD Towing Package

Our Solar Album https://www.jaycoowners.com/album.php?albumid=329
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