Steve, Can you elaborate on how heat affects batteries that sit in float service at high temperatures? What kind of cycle/capacity changes can we expect? Say, for example, that a bank of S-530 batteries are 5 years old and have spent days at 40C and nights at 25C, and have essentially been in float service except for a couple dozen cycles to 50% over the years. If these batteries are now put into regular daily cycles at the same temperatures, would they act much differently than batteries that were stored at a constant 25C?
I guess my question boils down to whether cycling during high temperatures is more damaging than just being "stored" at high temperatures. Thanks, Jason On Mon, May 25, 2015 at 1:14 PM, Steve Higgins <[email protected]> wrote: > Typically you want the BTS installed and any and every case… The BTS > should be installed below the level of the plates not on the top of the > battery. To do this you need to have the BTS about 1/3 to ½ the way down > the side (Single Wall) of the battery, and I would suggest running some > duct tape around the battery on the sensor to keep it on the side of the > battery. > > > > For a Double wall battery, Although the sensor will be close, it will get > better readings in between the plastic walls. To do so you can pull the > top off the battery and put it between the walls. There is usually some > black silicone around the pos/neg terminals, all you need to do is replace > that with regular old RTV silicone… > > > > Post mounts are okay, but Surrette prefers the side mounts with another > method of securing the sensors… The post mounts only sense the plate temp, > not the overall temp of the battery. > > > > Temperature is a killer, and my years at Outback, and Trace I had no idea > of how damaging this was until I came to work for Surrette. > > For every 10 Degrees C above 25 you lose 50% of your life cycles… For > example if you installed these in the Mojave desert where six month of the > year they would reach 95F+ you would probably lose about 25-30% of your > life cycles… One of the ways to combat this if you can is vault them…it’s a > lot of work, but the earth even in those environments will keep them > cooler. > > > > > > > > > > > > > > *Steve Higgins Technical Services Manager *P: +1.902.597.4020 > M: +1.206.790.5840 > F: +1.902.597.8447 > > *Surrette Battery Company *Exclusive manufacturer of > <http://www.rollsbattery.com> > > *From:* RE-wrenches [mailto:[email protected]] *On > Behalf Of *Ray Walters > *Sent:* Saturday, May 23, 2015 8:05 PM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] FLA battery setpoints with larger arrays > > > > Having the LVD be temperature compensated so that the load is always > disconnected above the freeze point of the battery would be a Huge > Improvement on the whole concept of LVD. In combination with State of > Charge monitoring, like the Whiz bang Jr, would be the most effective, and > just program the disconnect to stay above freezing for a typical lead acid > battery. I got this from a Trojan White Paper: > > > R.Ray Walters > > CTO, Solarray, Inc > > Nabcep Certified PV Installer, > > Licensed Master Electrician > > Solar Design Engineer > > 303 505-8760 > > > > > FLA batteries will freeze easier if they are discharged. I suppose that > you could > use the battery temp sensor to make sure you charge them up good when > the temp gets cold enough. > > boB > > This email and its attachments have been scanned by mailWatch E-Mail > Firewall for viruses, spam, and malicious content. The information > transmitted in this email is intended only for the entity or person to > which it is addressed and may contain confidential/privileged material. If > you received this in error, please contact the sender and delete the > material from any computer. Any review, retransmission, dissemination, or > other use of this information by persons or entities other than the > intended recipient is strictly prohibited > > > _______________________________________________ > 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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