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Old 03-22-2012, 10:13 AM   #1
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Battery Basics

Alright, I am very green so don't cringe. I have a couple of battery questions.

1. I know that the TV will charge the camper battery when running. Should I always disconnect from the TV when setup for camping? (ie. will my TV drain my camper batt.?)

2. When charging the camper batt. w/ a gennny, should I disconnect the batt. to camper connections? I read something about disconn. the ground or (-) terminal only. Is this process the same for disconn the (-) when using a simple battery charger at home?

3. I have a Honda genny with the "automotive type battery" battery charging cable. Does this include deep cycle marine battery's?

4. I also have a ship n' shore speed charger with 15, 10, and 2 amp charge settings. The built in genny charger is 8 amp charge I believe. I could bring the speed charger if that would be better/easier. I am thinking I could run the genny in eco-mode if I did that.

5. The speed charger gives a charge % as well so I know when it's fully charged. Is there a tool I can use to check batt charge if just using genny charging cable?

Thanks alot for any and all help with this.

LM
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Old 03-22-2012, 10:43 AM   #2
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Originally Posted by loganmartin View Post
Alright, I am very green so don't cringe. I have a couple of battery questions.

1. I know that the TV will charge the camper battery when running. Should I always disconnect from the TV when setup for camping? (ie. will my TV drain my camper batt.?)
the TV will trickle charge the battery. don't expect it to fully recharge a low battery unless you're driving for 10 hours. as to disconnecting, depends on what you're towing with.

2. When charging the camper batt. w/ a gennny, should I disconnect the batt. to camper connections? I read something about disconn. the ground or (-) terminal only. Is this process the same for disconn the (-) when using a simple battery charger at home?
just plug your shore cord into the genny, the onboard converter should have a 3-stage charger built-in. unless your RV is older.

3. I have a Honda genny with the "automotive type battery" battery charging cable. Does this include deep cycle marine battery's?
very inefficient way to recharge. the RV's converter is much faster

4. I also have a ship n' shore speed charger with 15, 10, and 2 amp charge settings. The built in genny charger is 8 amp charge I believe. I could bring the speed charger if that would be better/easier. I am thinking I could run the genny in eco-mode if I did that.
no need if you have a newer RV.

5. The speed charger gives a charge % as well so I know when it's fully charged. Is there a tool I can use to check batt charge if just using genny charging cable?
get a multi-meter

Thanks alot for any and all help with this.

LM
here's my answers.
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Old 03-22-2012, 10:45 AM   #3
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very nice bikendan...I am making this thing harder than it is.lol

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Old 03-22-2012, 11:25 AM   #4
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Originally Posted by loganmartin View Post
4. I also have a ship n' shore speed charger with 15, 10, and 2 amp charge settings. The built in genny charger is 8 amp charge I believe. I could bring the speed charger if that would be better/easier. I am thinking I could run the genny in eco-mode if I did that.
I use the Ship n' Shore (same one as you have) because I feel it gives a better "top charge" and is MAYBE quicker. I can never get more than 13.6 volts out of my converter charge even though it is supposed to have a 14.4 mode. (Not trying to debate your answer BikenDan! It's very possible I don't fully understand the situation! ) BUT the Ship n' Shore will go as high as 16 volts at the end and then I worry about the RV electronics so I'll disconnect the battery from the trailer once it gets to about 14.6 volts or just quit at that point. Anyone know whether 16 volts is harmful? Am I on the wrong track about the voltage? Somebody educate me!!

But the Shore Power plugged into the genny is a great solution and less stuff to bring along. You also have the advantage of 110V available for other things then. Our Honda mostly runs Eco mode in this scenario except when a big 110V draw comes along.
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Old 03-22-2012, 11:43 AM   #5
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I think Dan answered your questions and the only thing I would add is to compare the charging with the Generator/Ship n' Shore combo vs the Generator/Converter combo.

Many deep cycle batteries need a higher voltage than the converter can provide. Trojan batteries need 14.8 volts.

I charge through the converter because its convenient when camping with electric and that is probably what I would do if I had a generator and was camping with that.

But at home, I always charge through my 40amp Stanley charger.
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Old 03-22-2012, 03:05 PM   #6
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thanks everyone. Sounds like there's more than one way to skin a cat. I understand I won't pick up years or decades of knowledge through a few internet posts...but it sure does shorten the learning curve a bit.

Just fired up the EU2000 for the first time...about a half dozen pulls. I went with mobile one synthetic 10w-30. I also added some Safegaurd ethanol fuel stabilizer to my fuel. Gonna let er run for about 30 mins without a load. Am I in the ballpark fellas?
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Old 03-22-2012, 03:26 PM   #7
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my point is that for most situations, the newer 3-stage converters can charge batteries very well.
is it better than a stand alone charger, like the Ship n Shore? probably not.
but is it necessary to take a stand alone charger camping with you, probably not.
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Old 03-22-2012, 04:24 PM   #8
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Pretty much what everyone here said.

In my case, when "dry camping," I turn off the main battery disconnect. Then I plug the shore power cable into the 30 amp outlet of the Yamaha 3000.

I plug the Ship n Shore charger into the 15 amp outlet on the generator and hook it up to the battery bank.

I find that doing it this way is faster (runs the generator less); fully tops off the battery; and desulphates if the batteries need it. The on board converter does not have the 4th stage (desulphating) that the Ship-n-Shore has.

Your experience may differ...
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Old 03-22-2012, 04:29 PM   #9
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Pretty much what everyone here said.

In my case, when "dry camping," I turn off the main battery disconnect. Then I plug the shore power cable into the 30 amp outlet of the Yamaha 3000.

I plug the Ship n Shore charger into the 15 amp outlet on the generator and hook it up to the battery bank.

I find that doing it this way is faster (runs the generator less); fully tops off the battery; and desulphates if the batteries need it. The on board converter does not have the 4th stage (desulphating) that the Ship-n-Shore has.

Your experience may differ...
...and where might I find the main battery disconnect and what will it look like? I have a 60 amp fuse near the battery that I can remove..
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Old 03-22-2012, 04:50 PM   #10
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Many deep cycle batteries need a higher voltage than the converter can provide. Trojan batteries need 14.8 volts.
We have a Trojan battery also and it DOES hold its charge longer after the SnS versus just the converter charger.
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