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Old 12-22-2005, 08:14 AM   #1
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I have 2 Interstate 6 volt house batteries currently but have room for 4 in the same compartment. I have 2 extra batteries (same model, etc) and want to add them.

Will this hurt or help?

Can someone send me the correct wiring procedure if I add the other 2 so I get them wired in correct?

My inverter is only a 140 watt but I plan to add a 2000-2500 watt inverter soon and will need the 4 batteries then I know (have a planned appt with Monaco in Elkhart in May 2006 where they will do the work unless I find a better price, etc in the meantime).
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Old 12-22-2005, 08:14 AM   #2
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I have 2 Interstate 6 volt house batteries currently but have room for 4 in the same compartment. I have 2 extra batteries (same model, etc) and want to add them.

Will this hurt or help?

Can someone send me the correct wiring procedure if I add the other 2 so I get them wired in correct?

My inverter is only a 140 watt but I plan to add a 2000-2500 watt inverter soon and will need the 4 batteries then I know (have a planned appt with Monaco in Elkhart in May 2006 where they will do the work unless I find a better price, etc in the meantime).
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Old 12-22-2005, 09:50 AM   #3
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You might find this helpful

The 12V side of life
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Old 01-06-2006, 11:33 AM   #4
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In wiring each pair in series and then parrelling them as described in the former poster's link, you should also try to arrange the cables such as not to block the removal of the cap sets. If not, you have to disconnect one or more cables to access the ports for regular service. Mine were originally that way which was a pain as I had to reset various items after the power shutdown. I re-routed the cables and now have eliminated the obstruction making the service both quicker and easier.
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Old 01-08-2006, 05:46 AM   #5
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Wiring them all into a single battery bank is OK unless the batteries are significantly different in AGE.

If one pair has been used, and the other pair is new, the older pair will draw down the new pair and reduce their lifespan.

The greater difference in age the more this matters. For example, if the batteries are 6 months different I'd say use them and don't worry about it (purists will scoff at this, but what the heck, it will work). However, if one pair is 2 years old and the other is new then it's time to consider buying 2 more new batteries.

Here's a link to some more battery info

Mac

*Added on edit* You didn't ask but...
With an inverter that size you may want to see if you can squeeze in six batteries, four is fairly marginal for that size inverter if you plan to use it very much at all.
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