Darryl, It sounds like you need a new set of calcium based batteries, or LFP batteries, if they can afford them.
Remember Lead Antimony batteries want to cycle, calcium batteries, can sit in float for years...Even so, I still like to cycle Lead-Calcium at least 3-4 times a year... If you use a Lead Antimony battery in a backup application, it's a good idea to cycle them 15-30% at least once a month. 17 years is a bit aged for AGM batteries, after 10-12 years, since they are starved electrolyte batteries they tend to dry out, this will cause severe loss of capacity. <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> <http://www.rollsbattery.com> Steve Higgins ⋅ Technical Services Manager t +1.902.597.4020 m +1.206.790.5840 f +1.902.597.8447 e [email protected] <#SignatureSanitizer_> <http://www.facebook.com/RollsBattery> <http://www.facebook.com/RollsBattery> <http://www.twitter.com/RollsBattery> <https://www.youtube.com/user/RollsBattery> <https://www.linkedin.com/company/rolls-battery-engineering> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> <http://www.instagram.com/RollsBattery> ------------------------------ CONFIDENTIALITY: The information transmitted herein is intended only for the addressee and may contain confidential, proprietary and/or privileged material. Any unauthorized review, distribution or other use of or the taking of any action in reliance upon this information is prohibited. If you receive this email in error, please contact the sender and delete or destroy this message and all copies. ------------------------------ On Mon, Feb 18, 2019 at 6:50 AM Darryl Thayer <[email protected]> wrote: > My customer had C&D 600 AH 24 volt 7 kWh @ 50% DOD. AGM style, for a > backup system. After 17 years when the power went out at 23 below. > batteries were warm. They delivered only 1.5 kWh before going below 22 > volts. The customer wants a similar or better set. On Float all the > time. Trojan says they are not the battery, to little cycling. Who? > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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