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Old 07-04-2018, 09:04 PM   #1
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Charging battery question

For you experienced boondockers running g a generator which of the following ways is the best way to charge your batteries:

Charge off the house trickle charger when hoojed up to the genny,
Use the genny's 12 volt connection ,
Or
Plug in a portable battery charger to the genny?

When I say house charger most RVs have an onboard charger to keep the batteries charged while connected to shore power.
I Would think the direct 12 volt connection to the genny would be the most effecient. What say you guys?
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Old 07-04-2018, 09:43 PM   #2
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NEVER use the 12v connection, it's the worst way to recharge a battery. You'd be better off using jumper cables off the tow vehicle.
We just plug the shore cord into the generator. Worked for us for 15 years.
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Old 07-05-2018, 06:35 AM   #3
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Thanks! I appreciate it.
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Old 07-11-2018, 10:39 PM   #4
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Plug your shore power cord into the generator. The converter is going to charge it. Better and faster than any battery charger.
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Old 07-12-2018, 08:47 AM   #5
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Solar is the best way set it and forget it!
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Old 07-12-2018, 10:16 AM   #6
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Quote:
Originally Posted by Justice12t View Post
Solar is the best way set it and forget it!
Thread is about charging with a generator. One day all of us will have solar..... When the price is right
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Old 07-12-2018, 10:41 AM   #7
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Just be aware that WFCO brand converter/charger units have poor performance. They usually do not charge at "Bulk" rate unless they sense less than 12.0 volts at the battery, which is the 50% state of charge that you should go below for decent battery life. This means that charging times are very long, compared to a decent converter or dedicated automotive charger.

I use a single battery rated at 75 Amp Hours and an automotive charger that outputs 14.4 volts. This gives me a charge rate of approx. C/8, which is considered optimal. After 2-3 hours I disconnect the charger and let the WFCO converter finish the charging at 13.6 volts.
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Old 07-12-2018, 11:04 AM   #8
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Just be aware that WFCO brand converter/charger units have poor performance.
Actually, WFCO converters have good performance, they just get a bad rep on forums for some unknown reason. Thousands of us use them with no problems.

We boondock for weeks at a time with 2 series 27 marine batteries. Recharge them daily by running generator an avg of 5 hours a day. Which we would do anyway.

Do aftermarket converters work better/faster? Some do, but you pay for that.

WFCO converters work just fine for the great majority of us
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Old 07-12-2018, 11:05 AM   #9
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Thread is about charging with a generator. One day all of us will have solar..... When the price is right
I know I know...I guess these threads are all work and no play...
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Old 07-12-2018, 11:14 AM   #10
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Originally Posted by Smokyroo View Post
For you experienced boondockers running g a generator which of the following ways is the best way to charge your batteries:

Charge off the house trickle charger when hoojed up to the genny,
Use the genny's 12 volt connection ,
Or
Plug in a portable battery charger to the genny?

When I say house charger most RVs have an onboard charger to keep the batteries charged while connected to shore power.
I Would think the direct 12 volt connection to the genny would be the most effecient. What say you guys?
I have done both. Used the normal RV power cord and a direct to the battery charger. I honestly couldn't see much of a difference between them, meaning my batteries seemed to charge to roughly the same percentage. However, charging via the power cord will give you added functionality in the RV depending on the size of your genny. Meaning you can run something inside while running the generator.

There will be a lot of good information here...good luck.
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