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Old 10-26-2016, 02:32 PM   #1
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Battery charging

OK you battery experts I have a question...Because of volatile voltage swings at my rented storage barn I do not want to use my inverter any longer for battery maintainer charge...
1.So I want to buy a charger-maintainer that will charge my 6 volt house batteries arranged in series. The cables from my coach and inverter go to two poles on two batteries where as you know the cables carry current both ways....charging and use discharging. Stands to reason this is where I connect my charger-maintainer,
right?
2.Also what amps do I set charger on or do I use auto?
I don't want to cook a battery or worse..
Starter engine batteries are in parallel..in engine compartment..Will use separate maintainer for those..
This shouldn't be that difficult but batteries esp in series and multiple batteries cause my concerns. Below is the charger-maintainer looking at.
Thanks
frank
http://www.northerntool.com/images/p...08_200x200.jpg
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Old 10-26-2016, 02:50 PM   #2
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Quote:
Originally Posted by fishdoc View Post
OK you battery experts I have a question...Because of volatile voltage swings at my rented storage barn I do not want to use my inverter any longer for battery maintainer charge...
1.So I want to buy a charger-maintainer that will charge my 6 volt house batteries arranged in series. The cables from my coach and inverter go to two poles on two batteries where as you know the cables carry current both ways....charging and use discharging. Stands to reason this is where I connect my charger-maintainer,
right?
2.Also what amps do I set charger on or do I use auto?
I don't want to cook a battery or worse..
Starter engine batteries are in parallel..in engine compartment..Will use separate maintainer for those..
This shouldn't be that difficult but batteries esp in series and multiple batteries cause my concerns. Below is the charger-maintainer looking at.
Thanks
frank
http://www.northerntool.com/images/p...08_200x200.jpg
fishdoc
If you intend to leave it on permanently, (for longer than 4-6 hours), use auto.
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Old 10-26-2016, 04:06 PM   #3
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.Because of volatile voltage swings

This is the reasoning you don't want to use your on board inverter/charger right? May I ask, what makes you think that those "volatile voltage swings" will not effect your new maintainers? And, just for curiosity, what kind of voltage swings are you seeing? And, why? Is it the power company that's causing this?

I simply ask all these questions because, you already have a system in place that, for the most part, normally works quite well. In our coach, an '04 Itasca Horizon 36GD with the 330HP C-7, we have the Magnum 2012SE Inverter/Charger. It's more than likely like yours in that, it will start off at a higher rate of charge, if, IF, the batteries need it. Then, as the state of charge comes up, the charge rate drops. When they're topped off, the charger side of that Inverter/Charger simply goes into a maintenance mode.

So, anyway, just wondering some things trying to help. The "Auto" mode on most of those types of chargers is normally pretty good. In that mode, they act just like what mine in my coach does. Good luck.
Scott
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Old 10-26-2016, 04:56 PM   #4
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Scott,
Thanks for that observation...My inverter when starts at bulk charge drags the voltage coming from outlet to 103-5 volts causing my inverter to trip. This cant be good for inverter...The storage location wiring is not adequate for draw by my inverter...Works fine at my home's 110 outlet...
So rather than move I was advised that a maintainer charger would not tax the voltage as much..while charging batteries...I hope that's correct advice. At any rate the tripping of my inverter and possible damage is reason to by pass and install external charger.
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Old 10-26-2016, 05:05 PM   #5
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Scott,

Thanks for that observation...My inverter when starts at bulk charge drags the voltage coming from outlet to 103-5 volts causing my inverter to trip. This cant be good for inverter...The storage location wiring is not adequate for draw by my inverter...Works fine at my home's 110 outlet...

So rather than move I was advised that a maintainer charger would not tax the voltage as much..while charging batteries...I hope that's correct advice. At any rate the tripping of my inverter and possible damage is reason to by pass and install external charger.

You may be able to set a switch on your inverter/charger to reduce its charging amps.....this is a pretty common thing when your shore power is only 15 amp service. Might avoid the issue you are seeing.

Also once the batteries are fully charged, it shouldn't ever need to go back into bulk mode.....it should just idle along in float mode.
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Old 10-26-2016, 05:16 PM   #6
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There are many Marine dual output, fully automatic, chargers on the market.

Connect the wires, plug it in and forget it.

Just another option.

http://www.starmarinedepot.com/proma...F1IaAvBK8P8HAQ
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Old 10-26-2016, 09:18 PM   #7
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well i would check wire size to start from battery..it should not drop that much also wire size to transfer switch and beyond and make sure no warm wires for tight connections .. never should happen


Quote:
Originally Posted by fishdoc View Post
Scott,
Thanks for that observation...My inverter when starts at bulk charge drags the voltage coming from outlet to 103-5 volts causing my inverter to trip. This cant be good for inverter...The storage location wiring is not adequate for draw by my inverter...Works fine at my home's 110 outlet...
So rather than move I was advised that a maintainer charger would not tax the voltage as much..while charging batteries...I hope that's correct advice. At any rate the tripping of my inverter and possible damage is reason to by pass and install external charger.
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