[RE-wrenches] Battery Temp compensation

Maverick Brown maverick at mavericksolar.com
Fri Aug 5 09:18:37 PDT 2022

I second what you are saying. Even for LiFePO4 batteries on Outback, I’d love to be able to the battery temperature (I.e. room temperature) via OpticsRE and also be able to edit the temp comp to zero. Of the handful of other brands that I use, most have this setting as a direct editable setting. 

I do edit the value for different brands, sometimes it is hard to find the exact number for each brand, but it improves SOC accuracy and Specific Gravity vs Voltage readings when properly programmed. 

Maverick Brown
Off-Grid Solar Commander since 2006
Maverick Solar Enterprises, Inc.
 • Solar Commander Remote Power
 • SunFlow Systems Cathodic Protection 
maverick at mavericksolar.com

> On Aug 5, 2022, at 10:38 AM, William Miller via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> Friends:
> I am curious if any of you change the temperature compensation values for charge systems in lead-acid battery systems to comply with a battery manufacturer’s specifications.  Doing this would require that you drill down into the technical literature to find that value and then have inverter and charge control systems that allow you to make such a change. 
> I looked carefully through the Outback FXR and Mate 3s literature and found no such setting in the standard values (millivolts per Degree C per cell or per string).  I did find that Conext XW systems have that capability in the custom battery menus.  I am not sure about all of the other inverter and charge control systems out there but if you use any of them it is worth checking.
> This has become an issue for me in a warranty claim and I am just curious what others are doing in this regard.  This is also a heads-up to all of you that deal with lead acid to make sure you pick batteries that are compatible with your electronics, particularly VRLA batteries.
> Thanks in advance.
> William Miller
> Miller Solar
> 17395 Oak Road, Atascadero, CA 93422
> 805-438-5600
> www.millersolar.com
> CA Lic. 773985
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