The Surrette Tech Bulletin 614 is available for download at http://surrette.com/files/BU-RS-614.pdf. My understanding is that this bulletin is the direct result of the complaints on this list about two years ago about Surrette battery performance and life.Allan- - - - - - - - - - - - - - - - - - - - -I think this started two years ago with my complaint that we had an off-grid system that worked great for years using L-16's with no problem reaching a full charge with either the solar array or the generator, then after replacing the 6 year old bank with Surrette's of equal amp-hr size we never could run the generator long enough to reach a 100% full charge state.As I recall, we were told these batteries have an unusual lead plate composition that gives them a much longer life and low water usage than other brands, but also makes it very hard to fully charge unless you have grid backup available. I think these do much better in applications that can provide very long and slow float charges like a grid backup power system, but may not work as well when the charging process is a generator. We no longer use them in off-grid applications unless the solar is really over-sized.Jeff Yago
Netscape. Just the Net You Need.
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