Posted by Ignoramus28797 on October 20, 2008, 8:46 am
I bought a Harbor Freight solar battery charger for 12v batteries, to
keep my generator battery charged, but now I have become a little
concerned as to whether it will overcharge the battery. Any thoughts?
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Posted by news on October 20, 2008, 9:43 am
On Mon, 20 Oct 2008 07:46:12 -0500, Ignoramus28797
>I bought a Harbor Freight solar battery charger for 12v batteries, to
>keep my generator battery charged, but now I have become a little
>concerned as to whether it will overcharge the battery. Any thoughts?
1. Which charger?
2. What's the ampere hour (AH) rating of the battery?
If the output of the charger is no more than 5% of the AH rating, then
it will likely not over charge.
John
Posted by Pete C. on October 20, 2008, 9:58 am
news@picaxe.us wrote:
>
> On Mon, 20 Oct 2008 07:46:12 -0500, Ignoramus28797
>
> >I bought a Harbor Freight solar battery charger for 12v batteries, to
> >keep my generator battery charged, but now I have become a little
> >concerned as to whether it will overcharge the battery. Any thoughts?
>
> 1. Which charger?
>
> 2. What's the ampere hour (AH) rating of the battery?
>
> If the output of the charger is no more than 5% of the AH rating, then
> it will likely not over charge.
>
> John
Also figure in the less than 50% charging duty cycle, unless the sun
shines 24 hours a day where you live.
Posted by Eeyore on October 20, 2008, 1:03 pm
"Pete C." wrote:
> news@picaxe.us wrote:
> > Ignoramus28797 wrote:
> >
> > >I bought a Harbor Freight solar battery charger for 12v batteries, to
> > >keep my generator battery charged, but now I have become a little
> > >concerned as to whether it will overcharge the battery. Any thoughts?
> >
> > 1. Which charger?
> >
> > 2. What's the ampere hour (AH) rating of the battery?
> >
> > If the output of the charger is no more than 5% of the AH rating, then
> > it will likely not over charge.
> Also figure in the less than 50% charging duty cycle, unless the sun
> shines 24 hours a day where you live.
More like 20% re: peak output (which is what it'll be rated at).
Graham
Posted by Ignoramus24384 on October 21, 2008, 2:51 pm
> On Mon, 20 Oct 2008 07:46:12 -0500, Ignoramus28797
>>I bought a Harbor Freight solar battery charger for 12v batteries, to
>>keep my generator battery charged, but now I have become a little
>>concerned as to whether it will overcharge the battery. Any thoughts?
> 1. Which charger?
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?ItemnumberD768
> 2. What's the ampere hour (AH) rating of the battery?
It is a automotive battery, but I would say 30-50 AH, making a guess.
> If the output of the charger is no more than 5% of the AH rating, then
> it will likely not over charge.
Output of the charges is in amps, I am not sure how to compare it to
amp hours.
i
> John
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>keep my generator battery charged, but now I have become a little
>concerned as to whether it will overcharge the battery. Any thoughts?