This has been a great string. Battery systems and the weather are the most variable things we all have to deal with- and the most misunderstood. I totally agree with Darryl here and it makes common sense. PV cells are manufactured under seriously strict controls and nearly entirely by machines and robotics, yet they still have variance from one individual cell to the next. Battery manufacture is better than that? No way. Having just one string doesn't get you away from the variables, just lessens their impact over many cycles and years. Bob-O On Jun 2, 2011, at 9:47 AM, Darryl Thayer wrote:
it is due to differences in the strings; in charging and in discharging differentials. this is due to temp differences very small differences in connections and differences in the cells themselves. Darry From: boB Gudgel <b...@midnitesolar.com> To: Darryl Thayer <daryl_so...@yahoo.com>; RE-wrenches <re-wrenches@lists.re-wrenches.org> Sent: Thursday, June 2, 2011 11:32 AM Subject: Re: [RE-wrenches] 24 volt Battery Bank comparison On 6/2/2011 9:03 AM, Darryl Thayer wrote: > > Excellent comment tom, so true. I get concerned that some of my experiences > are a collection of exceptions. I like Larry's comments because he has > worked so many systems. I have seen fires, but mostly because I have a > reputation and people wnat me to come and see what happened. > Darryl > Now my question would be... Why ? I have to think that with more batteries in the system, they are just not getting charged as well. If that's the case, I think this could be fixed. Haven't battery chargers and education gotten better since 1967, Tom ? boB
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