<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Allan,<div class=""><br class=""></div><div class="">All LFP batteries can be charged to a much higher voltage than we will ever use. Some as high as 4.2Vpc. A disconnect voltage of 3.8 Vpc is typical protection voltage for LFP batteries which is below the well maximum charge voltage. Some recommend charging to 3.65Vpc, others a little less. 56.4 is low at 3.52V. Our cell balancers don\u2019t even start to function until 3.5 volts and above. Using a low voltage can also cause a problem with the SoC calculations.</div><div class=""><br class=""></div><div class="">Using a Trimetric is easy if you use a high enough charge voltage of 3.55Vpc or higher and charge at .5C or less. </div><div class="">You can use L1 settings only, P7 Off. </div><div class="">Simply setup the reset parameter P1 voltage about 0.2V below charge voltage. </div><div class="">Leave P2 Charge Amps off. </div><div class="">Set P3 AH to match actual capacity. </div><div class="">When voltage parameter is met, you are close enough and it resets to 100%. This is due to internal resistance. Your voltage will not go high until you are at about 98% or so.<div class=""><div style="font-variant-ligatures: normal; font-variant-position: normal; font-variant-numeric: normal; font-variant-alternates: normal; font-variant-east-asian: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="margin: 0px; line-height: normal;" class=""><span style="-webkit-font-kerning: none;" class=""><font size="4" class=""><i class=""><br class=""></i></font></span></div><div style="margin: 0px; line-height: normal;" class="">FWIW, if your concern is about harming the Li cells, we have never had a single cell failure. We have had several ruined cells from neglect caused by over discharging when people did not follow EMS assembly instructions. With 4 cells in a 12 volt battery pack, I am talking about thousands of cells we have sold in the last 5 years. LFP is rugged, very fast to charge and will last a long time with little care.</div><div style="margin: 0px; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; line-height: normal;" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">When I read things about Li batteries on the internet, it makes my head spin from all the folklore, falsehoods and fear-born myths. Careful what you read.</div></div></div><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; orphans: auto; text-align: start; text-indent: 0px; widows: auto; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><br style="orphans: 2; widows: 2;" class=""><span style="orphans: 2; widows: 2;" class="">Larry Crutcher</span><br style="orphans: 2; widows: 2;" class=""><span style="orphans: 2; widows: 2;" class="">Starlight Solar Power Systems</span><br class=""></div></div></div><br class="Apple-interchange-newline" style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""></div><div><div class="">On Aug 21, 2018, at 12:26 PM, Sindelar Solar <<a href="mailto:Allan@sindelarsolar.com" class="">Allan@sindelarsolar.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><p style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">Yes, I just did. Ralph retired last year and I spoke with the new owner. In short, little change - use 2% of capacity for amp threshold and set CEF to 98% from default 94%. I was also told to stick with the default 14.1V voltage threshold, but that equates to 56.4V for a 48V system, which is above the normal range of these batteries, so I'm reluctant to take that advice.</p><p style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">I'm working with Kyle Bolger of Blue Planet on this first installation, and will post to the list what I learn that will benefit others.</p><p style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">Thank you, Allan<br class=""></p></div></div><br class=""></div></body></html>