Wrenches I have also used the turtle heater and it's just enough to keep everything up and operating. Insulation and a warm thermal mass makes it all hold together Funtimes Jerry
On Sun, Nov 5, 2023, 2:03 PM Allan Sindelar via RE-wrenches < [email protected]> wrote: > I did this modification to a 16kW Blue Ion LiFP bank during installation, > following this guide, Darryl. Blue Planet had sent me this. Shortly after > initial installation a plumber had installed an electric space heater in an > unheated space with water pipes, which of course soon drained the batteries > to LVD, so the BMS had shut them down. The BMS won’t accept a charge until > the batteries were about 1 1/2 degrees F above freezing. I did a winter > service call and worked with BP tech support. I plugged the same space > heater into a portable gennie and pointed it to the batteries, and as soon > as the BMS registered above freezing it allowed recharge from the array. > As I recall, besides the bubble/Mylar insulation (which was surprisingly > easy to install) the system used an 18w terrarium heating pad in the bottom > shelf under the batteries and a 9w pad on the upper shelf, controlled by an > external freeze-prevention thermostat. With a sufficient whole-house array > it’s proven to be a negligible load. > It’s a standalone system. I don’t recall the low-temperature discharge > limit; it’s quite a bit lower than the minimum charge temperature. And > summer heating is irrelevant with the thermostat. The rest you can get from > Blue Planet. > Allan > > On Nov 5, 2023, at 2:03 PM, Darryl Thayer via RE-wrenches < > [email protected]> wrote: > > > Great site, Allan, but many facts still need to be included. Was there a > discharge or charge going on? How much power was being drawn by the > heaters? If this is for a standalone system, energy consumption is very > important. What is the lower temperature cell discharge limit of Blue > Planet? What concern was taken for the summer and overheating? What are > the blue planet-specific heat and weight of the batteries? More questions, > but I doubt if anyone else is interested. Thank you. > > On Thu, Oct 26, 2023 at 11:49 AM Sindelar Solar via RE-wrenches < > [email protected]> wrote: > >> You might be able to get some ideas from this. It's worked well for me on >> one job. >> Allan >> >> On 10/25/2023 2:24 PM, Dana Orzel via RE-wrenches wrote: >> >> I know we have had this run thru before & wanted to see if any new >> options for heating LI batteries. >> >> >> >> I have an 8 pack of Homegrid LI batteries that is off grid with Radian >> 8048a. Originally, they were not going to be there for the winter, now it >> is a possibility they may visit. Plenty of solar 6KW+, hopefully generator >> back up waiting on delivery currently. >> >> Currently located in main room high ceilings/log cabin. >> >> Looking at creating an insulated closet & using terrarium heaters >> controlled if over 51volt heater on AC from inverter. Or just boxing in >> with 3-4” of blue board Styrofoam…. >> >> >> >> Has anyone else done something similar? >> >> Has anyone done this & it did not work? >> >> >> >> Thought & suggestions….. >> >> >> >> >> >> _________________________________________________________ >> >> Dana Orzel GREAT SOLAR WORKS! >> >> C – 208.721.7003 E – [email protected] >> >> W - www. greatsolarworks.com www.solarwork.com >> >> *“Responsible Technologies for Responsible People since 1988!”* >> >> >> >> _______________________________________________ >> 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 >> >> >> -- >> >> *Allan Sindelar* >> [email protected] >> RETIRED >> >> >> _______________________________________________ >> 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 > > _______________________________________________ > 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 > >
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