Larry, I understand your point. What I clarified is that periodic cycling is not a requirement or benefit in achieving longer flooded lead acid deep-cycle battery life. Equalization is still required depending application specific, yet at a much lower periodic rate than if the application was true cyclic. I also agree that there are lead acid batteries out there designed just for floating applications. Their design focus on thinner plates for higher current and less cycling. This technology does focus on low self-discharge, high corrosion resistance, not on the various technologies specifics related to deep cycling. Hence they like floating applications that stays in float mode 99% of the time and need to crank power very occasionally. Cycling such batteries will be reducing dramatically their life.
In a nut shell: there are benefits to tap in both technologies. Certainly there are "UPS" applications where floating mode is not looking for deep-cycling. Certainly there are "cyclic" applications where deep-cycling capability are mandatory. And then you have all in between, which makes all of us excited with different opinions. Ask 10 battery experts and the answers will be "it depends". I would say, understanding the loads and the application is a great step towards long life. Next steps are picking the right battery for the application, sizing, installation and maintenance. John John F. DeBoever Global Technical Director - Renewable Energy Trojan Battery Company 12380 Clark Street Santa Fe Springs, CA 90670 Tel: +1-562-236-3000 Ext. 3139 Cell: +1-845-514-7600 - NY office time zone: USA EST (GMT-5) Skype: john.f.deboever Fax: +1-562-236-3239 [email protected]<mailto:[email protected]> www.trojanbattery.com<http://www.trojanbattery.com/> From: [email protected] [mailto:[email protected]] On Behalf Of Larry Crutcher, Starlight Solar Power Systems Sent: Thursday, February 16, 2012 11:30 AM To: RE-wrenches Subject: Re: [RE-wrenches] Interstate L-16 vs Trojan L-16REB John, Are you including your new RE battery as being acceptable for float/standby service without cycling? Since you do not recommend cycling your battery, do you also recommend no equalization charge when in float/standby use? Frankly I question the logic of leaving any deep cycle flooded battery at a constant float voltage for months or years at a time. Do you have test data that will help me overcome my skepticism? Thank you, Larry Crutcher Starlight Solar Power Systems (928) 342-9103 On Feb 16, 2012, at 9:09 AM, John DeBoever wrote: Wrenches, Todd, Trojan Battery manufactures only true deep-cycling lead-acid batteries, from our 4 factories, based in the USA. Periodic cycling is not a requirement or benefit in achieving longer flooded lead acid deep-cycle battery life. There are some valid reasons to prefer flooded lead-acid deep-cycle lead-acid batteries for some residential semi-cycling / semi-floating applications. Typical floating-only applications do not have to feature a true deep cycle, although our Trojan products will work fine, without requiring periodic cycling. There are some batteries being marketed and labeled Deep Cycle that are not, and these will be affected by any amount of cycling, which is giving the Lead Acid industry a not so good name. John This e-mail message and any attachments that accompany it may contain information that is confidential, privileged, or protected from disclosure. It is intended solely for the use of the individual(s) to whom it was intended to be addressed. If you have received this e-mail by mistake, or you are not the intended recipient, any reading, disclosure, copying or other use of this communication is strictly prohibited. If you have received this communication in error, please immediately advise the sender at their phone number listed above, or by electronic mail, and also permanently delete the original and all copies of this e-mail and any attachments from all locations. Thank you.
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