On 3/25/09, Tobias Gogolin <usertogo@gmail.com> wrote:
> Hi happens that I find the piclist to be the community of the fittest
> electronic engineers that I know on the web, that's why I ask here and not
> on some of grid living list...
>
> I may have mentioned before that I use 10 pc. 12V car batteries at my of
> grid ranch, and that I charge those using a simple rectifier, either Bridge
> from 120V AC or 2 diodes using half of each of the 2 120V outlets around the
> center of my generators 240 V AC output (I do that to reduce the chance of
> any one of the automatic breakers of the 2 120V circuits from tripping).
>
> This seems to work quite good, but I just read that it is not advisable to
> charge Car batteries on pulse current,

Maybe you should start first by defining the amount o energy you need
for charging.
Assuming your car batteries have say 44Ah (but could also have 80Ah as
well) if you need to fast charge those batteries, you will need 140V
and 4...10A. I don't know where you read that is not advisable to
charge acid Pb batteries with pulse current, but you probably know
that a car battery acts like a huge capacitor. As long the charging
current is less than 10% of the battery nominal current and the
maximum voltage per one battery is less than 14V at full charge , it's
fine with current pulse charging.

Vasile
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