On 2/1/2014 9:52 PM, cdb wrote:
>
> :: Sort of. It takes less hardware to mount an array of many panels
> :: that way.
>
> Smacks head, never thought of that.
>
> Colin
> --
> cdb, colin@btech-online.co.uk on 2/02/2014
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actually, you can make a charger cheaper with a small PIC and a=20
P-channel MOSFET. In that way, you can do tests on the battery misc=20
battery types. We have almost 3 years of successful charging of=20
LEAD-ACID batteries, now doing LiPO testing. My favorite battery=20
chemistry is NiMH (as is used in the TOYOTA PRIUS), as its operating=20
lifetime is 5+yrs.

Because of clouds and other variations, we charge an electrolytic first,=20
then monitor and release the charge pulse itself, regulated via a PWM=20
channel, into the battery with a heavy P-MOSFET. Pulsing seems to work=20
better than steady-state current. The lead-acid battery life is about=20
2.5 years. My favorite battery chemistry is NiMH (used in the TOYOTA=20
PRIUS), as its operating lifetime is 5+yrs, but also more expensive than=20
lead-acid types.  .

-- Bob A

The only place success comes before work is in the dictionary.

VINCE LOMBARDI

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