NiCD battery

10 Posts
Dec 18, 2008 04:02 pm
NiCD battery

Does anybody use NiCD batteries and if so what is the largest.
How do those kind of batteries differ from the lead acid ones.
28 Posts
Dec 19, 2008 08:27 am
Re: NiCD battery

My former employer did large of grid commerical solar systems with NiCads. They apparently worked well but were very expensive to dispose of. Unlike small consumer NiCads that have recycling programs, the big ones are hazardous waste and you have to find someone who will process them.

The company switched over to VRLA batteries on newer installation.
10 Posts
Dec 19, 2008 11:55 am
Re: NiCD battery

What are VRLA batteries? How small do they come and can golf cart batteries be used on a small setup?
578 Posts
Dec 19, 2008 01:28 pm
Re: NiCD battery

i believe VRLA stands for

Valve Regulated Lead Acid

I think these are typically AGM or GEL type batteries.

here is an link to an example of a sealed AGM golf cart battery.

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33 Posts
Jan 4, 2009 04:45 pm
Re: NiCD battery

Does anybody use NiCD batteries and if so what is the largest.
How do those kind of batteries differ from the lead acid ones.

NiCad batteries are a poor choice for a stationary system. The way the paste works in them makes them too fussy on charge discharge depths. They really only shine when you are using them in portable situations or where weight counts or you're willing to live with low capacities for very high currents. The only useful situation I could see for them in a renewable install would be maybe a RV but even then you'd have to put up with a ton of hassles versus lead based batteries.
NiCad and Nickel metal hydride don't really fit in with renewable philosophies as they waste so much power charging and are really only good for highly portable power sources.
All the lead on the planet comes from radioactive decay of several parent elements so mining it is a bit of a pain if the parent elements haven't decayed completely so it should be recycled.

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