Upgrading your battery system.... - Page 11 - Escape Trailer Owners Community

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Old 12-15-2014, 04:52 PM   #101
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Quote:
Originally Posted by Brian B-P View Post
The NOCO response is surprising to me.

It almost looks like the response is for a pair of parallel batteries - if you substituted "parallel" for "series", it would make more sense (and even then no multi-bank model would have enough output).
I was wondering along those same lines, and I think you might have nailed it Brian about parallel rather than series.

I suppose with 2 unmatched batteries, it might present a problem. But with 2 identical models of the same age, I would think it would just "see" them as one large 12V and charge it accordingly. Or am I missing something?

(Interestingly, before I bought my Battery Tender model I asked them the same question and they replied that it would work very well in that battery configuration.)

I will see what I get back next and post it.
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Old 12-15-2014, 06:33 PM   #102
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Yeah, there is no way the charger can tell if there is two 6V batteries in series, or 1 12V. I agree that maybe they were thinking they were in parallel. A high equalization voltage, will bring all the cells up to their maximum voltage regardless of which setup you have, just so long as there is adequate amperage available.
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Old 12-15-2014, 07:11 PM   #103
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...and Happy Birthday Jim!

(There its been at least a week since I've done any serious thread drifting)
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Old 12-15-2014, 07:28 PM   #104
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...and Happy Birthday Jim!

(There its been at least a week since I've done any serious thread drifting)
Thanks, but not until tomorrow. Then I get old(er).
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Old 12-16-2014, 03:50 PM   #105
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I was wondering along those same lines, and I think you might have nailed it Brian about parallel rather than series.

I suppose with 2 unmatched batteries, it might present a problem. But with 2 identical models of the same age, I would think it would just "see" them as one large 12V and charge it accordingly. Or am I missing something?

(Interestingly, before I bought my Battery Tender model I asked them the same question and they replied that it would work very well in that battery configuration.)

I will see what I get back next and post it.
Well I have a lot of respect for this company. Rather than try to convince me to buy their product, the sales rep sent this in further reply:

"We do not have a 2 bank charger that can handle the 6V batteries at 230Ah. I'm letting you know that you can use the G7200 but that application is not ideal and I'm guessing those batteries were expensive so I hate to see you spend the money on the G7200 when its not ideal to charge a bank of batteries with one charger."


I thanked her for her help and honestly and told her what we had been discussing here (series/parallel) I also told her that it is very hard to find an external smart charger that DOES meet the requirements of our dual 6v setups and that theirs may well be as good as any available to us at any sort of reasonable price.
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Old 12-16-2014, 04:00 PM   #106
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I also told her that it is very hard to find an external smart charger that DOES meet the requirements of our dual 6v setups and that theirs may well be as good as any available to us at any sort of reasonable price.
Here's one worth looking at Black & Decker VEC1093DBD 4/10/20/40 Amp 12 Volt Smart Battery Charger With 110 Amp Engine Start // www.boatandrvaccessories.com

This model is now out of production but can still be had. At 40A it'll handle the twin 6's.
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Old 12-16-2014, 05:12 PM   #107
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I've already got one of these: Battery Tender
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Old 12-16-2014, 07:42 PM   #108
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That's the old Vector line, which was absorbed by Black&Decker. I have a smaller model, and I think it's a good product. Keep in mind that (unlike a typical RV converter/charger) these chargers need to be manually started each time AC power is restored to them.

The Vectors actually show charge current - not just voltage - which I think is a good feature.

Quote:
Originally Posted by thoer View Post
I've already got one of these: Battery Tender
At 5 amps maximum output, I think this is a maintainer for a 230 amp-hour battery bank, not much of a charger - but then, if that's all you need...
This model seems to have been replaced by Battery Tender® 5A Power Tender Series High Efficiency (PN: 022-0186G-DL-WH)
The higher-current chargers from Battery Tender appear to be quite expensive.
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Old 12-16-2014, 10:41 PM   #109
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T
At 5 amps maximum output, I think this is a maintainer for a 230 amp-hour battery bank, not much of a charger - but then, if that's all you need...
The higher-current chargers from Battery Tender appear to be quite expensive.
Not sure on your differentiation, other than the amount of time it takes to charge?
From what I have read, Interstate talks about charging volts not watts, and when I take multimeter readings, this one is reaching the 14.7v it is rated at during the absorption phase. So why is it not a charger?

It has always charged the batteries to 12.8V (but then the trailer has always been driven home and the batteries charged on the drive home, so they are already mostly charged)

What I liked about it when I bought it was that the absorption charge is 14.7v. While that is not as high as Interstate's recommendations, it was higher than many others in its price range when I got it on sale at Woot for $70.

The NOCO uses 14.4v in normal mode and 14.7v if put into the cold mode. What the Battery Tender doesn't have is the high voltage desulfatization mode that the NOCO, thus my interest in the NOCO.
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Old 12-16-2014, 11:18 PM   #110
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I use my 5 amp Battery Tender to keep my four 6 volt Interstate batteries on a float charge of 13.2 - 13.4 volts constantly while not camping. I believe this is the best way to store batteries while not in use to prolong their life. I used to keep them charging on the trailer solar charging system but they got hammered every morning when the sun came up even when not used the previous day. I now disconnect the solar charger via switch I installed and plug the battery bank into the Tender plugged into my house. The batteries are now always ready to go camping and the water level stay up where they are supposed to on the float charge.
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