Fro. My experiance yes On Wed, Mar 11, 2026, 12:57 PM Steve Higgins via RE-wrenches < [email protected]> wrote:
> Self-discharge (No Load) is typically around 1–2%, depending on > temperature and pack chemistry. Higher temperatures will accelerate this, > but it generally caps out at around 3-4% under worst-case conditions, > usually because the BMS shuts down the battery if temperatures get too high. > > The bigger concern is prolonged exposure to temperatures above 45 °C. At > those temperatures, you will begin to lose overall cycle life, which can > cause pack swelling, even if the batteries are just sitting in storage. > Based on current observations, that loss can be up to roughly 2% of overall > cycle life per year when exposed to those elevated temperatures. > > Unfortunately, there isn’t much comprehensive testing available yet. Right > now, we are conducting cold-weather testing to better understand how these > batteries are affected by low temperatures and what kind of long-term > damage cold exposure may cause. We’re seeing some preliminary results, but > complete data will likely take another 5–10 years to fully develop. > > We are currently observing that LFP batteries start to degrade at > temperatures below about –5 °C. The impact seems to average around 1% > additional degradation per year in both cycle life and capacity at those > temperatures. Prolonged exposure to -20 °C and below, you can also see > swelling from electrolyte freezing. > > One thing that is becoming increasingly clear through this testing is that > cell manufacturers’ published data often does not fully reflect real-world > performance, particularly in long-term environmental testing. > > > *Steve Higgins* *⋅* *Technical Services Manager* > *t* +1.902.597.4020 *m* +1.206.790.5840 > *f* +1.902.597.8447 *e* [email protected] > ------------------------------ > 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 Wed, Mar 11, 2026 at 10:20 AM Chris Schaefer <[email protected]> > wrote: > >> Steve, what is the self discharge on Lithium Iron Phosphate (LFP)? >> >> Christopher >> >> On Wed, Mar 11, 2026 at 11:26 AM Steve Higgins via RE-wrenches < >> [email protected]> wrote: >> >>> Typically, AGMs self-discharge around 2-3% per month at 25 °C. Higher >>> temps accelerate this, lower temps slow it down. >>> >>> Flooded Lead Acid is 8-12%, depending on plate sizes and the health of >>> cells. >>> >>> >>> *Steve Higgins* *⋅* *Technical Services Manager* >>> *t* +1.902.597.4020 *m* +1.206.790.5840 >>> *f* +1.902.597.8447 *e* [email protected] >>> ------------------------------ >>> 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 Wed, Mar 11, 2026 at 8:13 AM Mark Frye via RE-wrenches < >>> [email protected]> wrote: >>> >>>> Do AGM discharge 10% a month? >>>> _______________________________________________ >>>> List sponsored by Redwood Alliance >>>> >>>> Pay optional member dues here: http://re-wrenches.org >>>> >>>> List Address: [email protected] >>>> >>>> Change listserver email address & settings: >>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>> >>>> There are two list archives for searching. When one doesn't work, try >>>> the other: >>>> https://www.mail-archive.com/[email protected]/ >>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>> >>>> List rules & etiquette: >>>> http://www.re-wrenches.org/etiquette.htm >>>> >>>> Check out or update participant bios: >>>> http://www.members.re-wrenches.org >>>> >>>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> List Address: [email protected] >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> There are two list archives for searching. When one doesn't work, try >>> the other: >>> https://www.mail-archive.com/[email protected]/ >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> http://www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> http://www.members.re-wrenches.org >>> >>> >> >> -- >> >> Chris Schaefer’s >> >> >> *Tel 585-229-2083 or Cell 585-748-1870 * >> *5115 S Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com >> <http://www.solarandwindfx.com> ~ E-mail: [email protected] >> <[email protected]>* >> >> >> Thomas Jefferson, the author of our great Constitution, once said, >> "democracy" will cease to exist when you take away from those who are >> willing to work and give to those who would not." >> > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. 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