FixAMess Posted May 24, 2020 Share 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 Link to comment Share on other sites More sharing options...
martynw Posted May 25, 2020 Share 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 Link to comment Share on other sites More sharing options...
FixAMess Posted May 26, 2020 Author Share Posted May 26, 2020 12 hours ago, 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. 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 Link to comment Share on other sites More sharing options...
martynw Posted May 26, 2020 Share 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. Quote Link to comment Share on other sites More sharing options...
Dan F Posted December 21, 2022 Share Posted December 21, 2022 On 2020/05/25 at 10:52 PM, martynw said: This is the chart that I got for the US2000B, presume the newer models would have similar failsafes built in. Does anyone have this data for US5000 or know where I can find it? Also, any idea if the quoted 6000 cycles assumes 0.5C (0.8C in the case of US500), or some lower value? Quote Link to comment Share on other sites More sharing options...
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