[RE-wrenches] battery cycle life, US Battery

[Larry Crutcher, Starlight Solar]

Hi Ron,
Have a look back a few months ago to the discussion about multiple battery strings. My synopsis: large, parallel banks are not good; fewer strings are always better. How large a bank are we talking about here?

Scientist?? That sounds kind of like “Yea, I been a ‘lectrician for XX years...”, something I have heard hundreds of times. It’s just pride saying “Look, I can pee that far too!” when in reality they are clueless about DC power systems. I’m ranting but my point is you should convince your customer that a hands-on, real world experienced professional has a much broader understanding of RE system intricacies than a “scientist”.

Larry

From: Ron Young 
Sent: Thursday, September 15, 2011 5:11 PM
To: RE-wrenches 
Subject: Re: [RE-wrenches] battery cycle life, US Battery

Hi Larry, 
Client has asked me to compare the cycle life because he is upgrading a large battery bank and has been convinced by a Xantrex "scientist" that golf cart batteries are superior to L-16's even though it involves twice as many batteries, connections, cells, footprint etc. So to convince his purchasing committee he wants to know the difference in cycle life between a U.S.B 208 and a Surrette S-460.

Ron
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