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Old 06-24-2016, 06:15 PM   #1
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Charging /w Battery Tender

I have 2 deep cycle batteries in series on the RV.
Would like to be able to charge them both.
I have a Battery Tender Trickle Charger seen below.


If I attach this to one battery that is in series will it also charge the other one as well???

Thank in advance for any help.

Rhody
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Old 06-24-2016, 06:21 PM   #2
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If you have two batteries in parallel ( positive to positive & Negative to negative) then yes. If they are really in series ( positive to negative )then no. Are the batteries 6V or 12V? If they are 12V they are most likely in parallel. If they are 6V then they are in series.
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Old 06-24-2016, 06:34 PM   #3
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Originally Posted by Flybob View Post
If you have two batteries in parallel ( positive to positive & Negative to negative) then yes. If they are really in series ( positive to negative )then no. Are the batteries 6V or 12V? If they are 12V they are most likely in parallel. If they are 6V then they are in series.
Ok so I was incorrect, they are in wired in parallel.
Pos to Pos Neg to Neg.

So if I put the Battery Tender on one battery it will charge both?

Thank you for the speedy reply!

Rhody
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Old 06-24-2016, 06:38 PM   #4
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Old 06-24-2016, 06:57 PM   #5
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Depending on the amount of battery you have, you may not be happy with it. I bought one last year when I went to 6V's. That 1.25A charger wouldn't fully float them. I ended up giving the battery tender away and buying another CTEK.
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Old 06-24-2016, 08:09 PM   #6
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Depending on the amount of battery you have, you may not be happy with it. I bought one last year when I went to 6V's. That 1.25A charger wouldn't fully float them. I ended up giving the battery tender away and buying another CTEK.
Lol

Thanks I think I will be fine.
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Old 06-25-2016, 01:56 PM   #7
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Quote:
Originally Posted by Rhody View Post
Ok so I was incorrect, they are in wired in parallel.
Pos to Pos Neg to Neg.

So if I put the Battery Tender on one battery it will charge both?

Thank you for the speedy reply!

Rhody
DO NOT make light of the fact that you were incorrect. If in fact you hook them up in series you will have 24 volts coming out of two 12 volt batteries and most likely burn up your electronics and or create a fire which will burn your camper.
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Old 06-25-2016, 01:59 PM   #8
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Lol

Thanks I think I will be fine.
If you are looking to CHARGE rather than maintain....the Tender is not suitable. You need a minimum of a 10% of amp hours charger to do actual charging and it should provide 14.5V during bulk charging to mix your fluid preventing stratification and sulphation. You have a MINIMUM of 150 amp hours in a pair of 12Volts...so you need a smart charger of a minimum 15 amps...with 30 a much better choice.
Tenders tend...Chargers charge!
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Old 06-25-2016, 02:04 PM   #9
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DO NOT make light of the fact that you were incorrect. If in fact you hook them up in series you will have 24 volts coming out of two 12 volt batteries and most likely burn up your electronics and or create a fire which will burn your camper.
LOL
I I Captain...
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Old 06-25-2016, 02:06 PM   #10
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Originally Posted by camaraderie View Post
If you are looking to CHARGE rather than maintain....the Tender is not suitable. You need a minimum of a 10% of amp hours charger to do actual charging and it should provide 14.5V during bulk charging to mix your fluid preventing stratification and sulphation. You have a MINIMUM of 150 amp hours in a pair of 12Volts...so you need a smart charger of a minimum 15 amps...with 30 a much better choice.
Tenders tend...Chargers charge!
Brand New 1000 amp Gell Cells!

Tending Only!

Thank you!
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