mena661
Southern California
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Joined: 03/21/2009
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KampingKris wrote:We've got six interstate batteries and this fall they will be 6 years old. Do you know what size batteries you have? You could get less batteries but more capacity. I have four 6V's at 740 amp hours total.
2009 Newmar Canyon Star 3205, Ford F53 V10
Trojan L16 6V's 740 Amp-hours
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2oldman
Winchester WA
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smithrjd wrote: More batteries would mean more current required depending on the state of charge. Just think of 6 batteries connected together as one big battery. A 40a battery charger isn't going to charge at more than that rate no matter how big (many) a battery are connected to it.
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smithrjd
USA
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And as long as everthing is within that 40 amp rating then life will be good. The time it takes to charge will be related to the voltage applied. Which is dependant on the resistance and the current flow. Change any of the parameters and the rest will change accordingly.
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2oldman
Winchester WA
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Am I making sense?.. it seems we're talking about two different things.
Maybe the mod will move this thread.
* This post was
edited 09/30/11 09:28pm by 2oldman *
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pianotuna
Regina, SK, Canada
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Hi 2oldman,
Yes, you are making sense.
Regards, Don
Kustom Koach Class C 28'5" 256 watts Unisolar, 875 amp hours in two battery banks 12 volt batteries, 2500 MSW watt inverter.
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smithrjd
USA
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I guess that we are, Ohm's law is Ohm's law I = E/R not going to change.
Out Hear.
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smithrjd
USA
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One final thought, why would one want to charge deep cycle batteries with a 40 amp charger. Not very good for battery life. That is why they have trickle chargers. Heat, boiling, sulfation etc. My real point was that the wire in the 7 wire plug is not rated for a large amp draw. The limit on the whole circuit is the weakest link. I do understand what you are saying and yes it will work, limited by the fuse in the circuit. Is it the best way to go is what I would question.
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pianotuna
Regina, SK, Canada
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Hi smithrjd,
Then explain why the PD line of "smart converters" does high amperage charging for 4 hours, if the battery bank is low enough.
The chart below is for a 55 amp converter, and a single 125 amp-hour battery.
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smithrjd
USA
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It will work great, many high current chargers. Deep cycle batteries are designed for many discharge charge cycles, but charging at high current is also very hard on batteries and can shorten their life cycle. It is better to charge at low current over a longer period of time, less heat, less gassing, lower rate of sulfation. If you need the batteries back to charge in a short amount of time, (high charge current) you will trade off longer life of the batteries vice a low and slow charge rate.
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onekg
Washington State
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OP wants to know what kind of batteries to use. You guys are a little of topic.
2011 Ford F-350 DRW KR
05 Aplenlite 32 Augusta
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