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Old 01-01-2009, 12:10 PM   #1
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Join Date: Mar 2008
Location: St. Paul, Minnesota
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What is the best way to charge battery

We boondock a LOT in the National Forest Service Campgrounds. After 2 to 3 days, the batteries need some help. I have a Honda EU2000 generator that we use sparingly to be respectful to other campers. Our Surveyor is relatively new (2008) with a 3-stage converter. I can think of 3 ways to re-charge the battery using the generator:
1) Plug the trailer shore-power into the generator. Power the whole trailer and use the converter to re-charge.
2) Plug a battery charge into the generator and hook straight to the battery
3) Use the Honda 12-volt charger accessory into the generator and hook straight to the battery.

The first option has the added benefit of running some other things while charging; like a computer, hair dryer, or re-charging your camera/gps batteries. But outside of that, what do you think is most efficient?

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Old 01-01-2009, 01:33 PM   #2
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Location: Chelsea, Alabama
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First of all you have to run the generater. So I would think option #1 would be the way to go.Plus you have all the extra benefits you stated above.Just my 2 cents.

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Old 01-01-2009, 01:34 PM   #3
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I would suggest using number 1. Your RV has a good charger and, as you say, there's the added benefit of being able to do other things while the battery is charging. Number 3 is the least efficient because the Honda only supplies about 8 amps @ 12 volts.
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Old 01-01-2009, 03:35 PM   #4
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Location: Louisville, KY
Posts: 5,651
I agree with the others.....
number 1 since you have a quiet gennny.

Number 2 if you have a fast charger and you are in a hurry.
I have a charger that puts out 25 amps so I can get a decent charge in my
2 batteries in an hour.
My on-board power center won't give me a good charge in that short a time.

I have a cigarette lighter socket 12v/120v inverter if I need to charge anything small,
I don't need the genny for that. I saw one at Wally World the other day for
20 bucks.
I also have a 12v AA charger for the rest of my portable battery needs.

my 2
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