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UPDATE: My son unexpectedly went up to the cabin last night and he sent me a screen shot of the cell voltages. These values are after the battery sat dormant for 126 days, several of which when the temperature was well below freezing, at 55% SOC with all loads disconnected except the Overkill...

Curiouscarbon, thank you for the post. I am however having a bit of a problem drawing conclusions from the table. Is the full research paper available somewhere that would have a written conclusion to this study? What I am seeing in the table is that temperature as a function of charging and...

Thanks for that link from Solarcity. I found that paper very informative.

After doing more research and reading studies like the one referenced above in this thread your opinion on the subject aligns with my present thinking on the matter. I have read several of your posts on this forum and have a great amount of respect for your posts and opinions. I want to thank...

Thank you for the responses so far. I have done a search both on the internet and here on the forum. There just doesn't seem to be a consensus. Most everyone agrees that 1) never charge or attempt to charge the LifePO4 battery below 32 degrees F. 2) if storing for more than a month the...

Hi Upnorthandpersonal. This thread which was started in 2021 had some tremendous references on cold weather storage. I particularly like the research experimental data presented. This so so much better than just personal observational information. I am contacting you now to see if, to your...

Has anyone done any testing or experience with the Eco-Worthy LifePo4 100Ah battery? I see it for sale for $359. That is dirt cheap which intrigues on one level but concerned on another. Anyway, would appreciate any comments on this battery. Certainly wouldn't trust it for my solar system but...

That is the missing piece! I must not have read ALL the information on the Victron BMS. I just saw they had one and couldn't figure out why no one was using it. Thanks for pointing that out. How unfortunate.

Thank you jharrell. It took a while for me to decipher the bottom graph which like 3D. I agree that from this data the lower temps are certainly better for storage purposes but the lowest temp there is 25 degrees C or 77 degrees F! My question dealt with storage temps, for the most part, well...

Yes, I stopped the test when the AH's exceeded 280 (283 actually) and all cell voltages at that time were above 2.6v as stated above. I just want to know if I got good cells capable of 280AH. I did so I stopped the test, unhooked the resistive load cables from the battery and commenced...

Well, it has been a while since my original post. Sense then I have put a LifePO4 battery system using all Victron supporting components. I assembled the battery with cells purchased from Amy and used an Overkill BMS. The system has worked beyond my expectations during the warmer and...

Thanks to all who have taken the time to respond to my inquiry. I think I am seeing some consensus that cold storage of LifePO4 batteries with no charging or loads connected to the battery would not likely have a negative effect on the long term capacity of the battery. If anyone comes up with...

I am having the same difficulty with the discharge button. Can someone screen shot a picture of this jumper "wire". I am looking on my bms and I don't see any such thing. Yes, it is likely mine does not have a jumper but I would still be interested in seeing what it looks like and where it...

I know there are several members here who know of a gentleman in Australia who has a You Tube channel, Off-Grid Garage. He built a battery, charging in with solar panels etc. I have been watching his build and just wondering what others on here think about his setup and decisions he made for...

According to typed out steps you had in the beginning of the video you decided not to charge at the lower voltages first and then work up to 3.6V. Can you explain why?

Yes, I am starting to get a more clear picture of the storage issue from individuals posting on this site. Most studies presented here seem to indicate that cold weather storage will not harm the batteries at all, at least not of any significant nature as long as all loads are disconnected. I...

Thanks for the reply upnorth. Your synopsis is exactly what I had in mind when building my battery. I guess that is why I was taken back by all the problems this guy seemed to be having. I kind of had a suspicion that he either got badly mismatched cells and/or he did not top balance them...

Keep us informed. I am trying to decide what cells to buy and the ones you bought is on the list of "potentials"

Rickst29; let me know how your little experiment turns out. Interested in that issue as well.

Do you still have these buss bars??

I am really interested in the ReLion LT series of batteries. These have an internal heating element for cold weather applications. My questions are: anyone have experience with ReLion batteries? What is the quality of the batteries in general? I was hoping Will would do a review on the LT...

Thanks to the guys that responded. Hoping more chime in with time. To clarify, this is a cabin that will be used up until about December 20 and then not until late April or early May. It will get well below freezing. During the summer the cabin is used sporadically but even when used the...

Max PV open circuit voltage 60 volts. Morningstar MPPT sunsaver 15

In my experience estimating SOC from voltage of a LifePO4 battery is not very reliable due to the flat voltage delivered between the two "knees" of the charging/discharging profile of this chemistry. This chart appears to be one frequently seen with lead acid batteries. Has your experience been...

I am in the USA, Florida 34952

Will the Smart Shunt and/or the BMS have a parasitic draw? I need to leave my system dormant (no charging and no loads) for up to 4 months. I don't want ANY parasitic draw on the battery when I prepare the system for hibernation.

So, can one order the RS485 version of the LCD, hook it up to an RS485 port on the BMS and then still have the Bluetooth dongle in the UART port??? Are we sure the BMS has both ports described above? Is it possible to have the LED screen to view AND the Bluetooth connection for the phone at the...

Got it thanks so much. Those Pelican boxes must be REALLY nice for that kind of price. Close to if not the $200.00 mark! I am thinking more and more along the lines of the cooler idea. I don't know what the application is off those using the Pelican box but it must be some pretty rugged...

I have a similar question about disconnecting the BMS. I have a battery disconnect mounted on the battery box but this is after the BMS and Smart Shunt that is inside the box. I realize there is a resting mA draw when the BMS is powered and I would imagine the same for the Smart Shunt...