June 7, 20223 yr Hello everyone, I am using Pylontech UP5000 batteries and are obviously trying to make sure that we treat them 'well' so that they last the longest time possible. The operating temperature is between -10 and +60 degrees Celsius, although the design life is measured at 25 degrees. We all understand that higher temperatures are not good for electronics, and that if you are running the batteries at 45 degrees, they would typically not last as long. Question is, should we aim to keep the batteries as cool as possible (15-20 degrees) to prolong life, or is this also not good for batteries, similar to higher temperatures. Happy to hear your thoughts on this one.
June 7, 20223 yr Good day. This has already been answered I do not know how to link to this discussion, so I just copied and pasted it. Pylontech BMS zero deg C charging By FixAMess, May 24, 2020 in Batteries FixAMess Members 426 Posted May 24, 2020 Does the pylontech bms restrict charging at low temps? The manual says it works between 0-50C, but does it have a low temp cutoff, no charging? Quote martynw Members 17 Posted May 25, 2020 Yes, the BMS restricts the rate. I found this out a few years ago because my stack is in the garage and the temperature in there got down to about 5°C during the first winter after I installed it. The BMS limits both charge and discharge rates on a sliding scale depending on the temperature. Since then I built a better stack with about 200mm of solid insulation around it and a proper heating and cooling system which helps to keep the temperature > 20°C in the winter and < 30°C in the summer. This is the chart that I got for the US2000B, presume the newer models would have similar failsafes built in. FixAMess 1 Quote FixAMess Members 426 Author Posted May 26, 2020 On 2020/05/25 at 11:52 PM, martynw said: Yes, the BMS restricts the rate. I found this out a few years ago because my stack is in the garage and the temperature in there got down to about 5°C during the first winter after I installed it. The BMS limits both charge and discharge rates on a sliding scale depending on the temperature. Since then I built a better stack with about 200mm of solid insulation around it and a proper heating and cooling system which helps to keep the temperature > 20°C in the winter and < 30°C in the summer. This is the chart that I got for the US2000B, presume the newer models would have similar failsafes built in. Expand Thank you very much, even Pylontech told me it does have low temp cutoff, but nobody has given me the actual parameters like you have! Quote martynw Members 17 Posted May 26, 2020 No problem, it was quite a bit of head scratching at the time as to why the stack was suddenly taking much longer to charge.
June 8, 20223 yr Author Thank you. I saw this thread but this is not exactly the same question. If Pylontech tests the design life at 25 degerees, should we aim to run the batteries at 25 degrees, or would it be better for prolonged life if they are run at 15 degrees? From the article I would assume anything between 10 and 40 is 'normal', but I know that this isn't the case and if a battery reaches 40 degrees, its life will be shortened. Edited June 8, 20223 yr by JoJoDave
June 8, 20223 yr 14 minutes ago, JoJoDave said: If Pylontech tests the design life at 25 degerees, should we aim to run the batteries at 25 degrees, or would it be better for prolonged life if they are run at 15 degrees? Lower than 25 will impact life and capacity more than above 25. For best results stay within 20-30°C
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