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Old 01-01-2015, 11:48 AM   #15
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"2 is now correct. I used four six volt batteries on our 12v houseboat for 27 years. Used four Trojan 104s. Had a 1500w Readiline motor-generator to power microwave and espresso maker (not at the same time). Plenty of power for three to four days and nights.


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Old 01-01-2015, 12:35 PM   #16
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Sorry guys, but you're still not there. The positive output should be at one end if the bank with the negative output at the other.

That means that the negative output should be on #4 negative, not #2.

While your latest diagram will work, the second bank is relying on the parallel connection instead of creating one big battery as stated above.

Placing the output cables at opposite ends of the battery bank assure you of even charging and even draws.


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Old 01-01-2015, 05:38 PM   #17
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Quote:
Originally Posted by lewster View Post
Sorry guys, but you're still not there. The positive output should be at one end if the bank with the negative output at the other.

That means that the negative output should be on #4 negative, not #2.

While your latest diagram will work, the second bank is relying on the parallel connection instead of creating one big battery as stated above.

Placing the output cables at opposite ends of the battery bank assure you of even charging and even draws.


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But if you create one big battery, won't it be 24V? I don't really like that drawing, so I did my own. Bear in mind that the wires that go into the junction are all the same length...

I started reading this thread, and got more and more confused!
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Old 01-01-2015, 06:46 PM   #18
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Nope. 2 6VDC batteries is series (pos of #1 to neg of #2 ) create a 12VDC battery of the same amperage (2 X 300 amp/hour batteries @6VDC in series will yield a single 12VDC battery @ 300 amp/hours. Do this between batteries 1/2 and 3/4.

You then connect the positive of #4 to the positive of #2, leaving the positive of # 1 as the output or 'tap' terminal. On the negative side, you connect the negative of battery 3 with the negative of #1, leaving the negative of #4 as the 'tap' terminal. you now have a battery bank of essentially 2 very large 12VDC batteries connected in parallel.

It's the diagrams that are making it confusing! I'll see if I can find a better, easier to understand diagram and post it shortly.
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Old 01-01-2015, 06:55 PM   #19
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I found an excellent explanation os series/parallel and combo battery connections, but could not copy and paste it here.

The link will take you to a Magnum Energy inverter/charger manual. Scroll to pages 60/61 for color drawings and complete explanations of the process and results.

http://magnumenergy.com/wp-content/u...Series_Web.pdf
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Old 01-01-2015, 07:02 PM   #20
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Here you go ! This is the way it should be done remember short as possible cables and aprox same length.

Don
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Old 01-01-2015, 07:16 PM   #21
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Here's the picture of the battery from Lewsters suggested web site .

Don
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Old 01-01-2015, 09:33 PM   #22
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When I looked at the two websites, I noticed you had not done a good job re-drawing the diagrams.
I have my entire house on solar power and my Flying Cloud. I used the forum on the Northern Arizona Wind and Sun forums for the information I needed. I am pasting the link to the RV section of the forum, I believe some of you will enjoy it.
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Old 01-01-2015, 09:52 PM   #23
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This is one of the post from the RV forum.

RV system up and running
I feel sort of... underwhelmed. It's all so... anti-climactic.

I have been studying, reading, posting, learning, And now have my system up and running.

3X Kyocera KC130GT panels wired in Parallel
1X Midnight Kid
1X Whizbang Jr
1X temp probe (they need to use more industrial cabling and make it longer)
1X Outback 500A shunt
2X Interstate GC2 batteries
1X Custom made combiner box with:
3X pushbutton 10 A breakers (0ne for each panel)
1X pushbutton 35 A breaker for combined load.
All panel and charge wiring is 10AWG. Longest run is Kid to batteries, about 20 ft (one way). Panels to combiner are 10-15 ft (ow) and combiner to Kid about 15 ft (ow).

It's all installed in my travel trailer.

Nothing exciting to report. It all seems to be working. I initially had to fumble my way though the menus to fix the AH setting from 416 to 216 AH, but it is all now set right. I am leaving the roof vent fans on tonight to run a typical overnight draw on the batteries to see what my SOC is in the morning, and then see how the system does. My panels are flat mounted, on a slightly curved roof, with one of them sort of facing away from the sun a wee bit. Front of the trailer is facing east, that panel is on the north side.

The batteries are 4 years old, and getting weak, so this is a good checkout.

I guess time for a new project... (Alde Hydronic heat install)

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