Carl j

So far Growatt have advised me to use : Protocol L01 for the BMS - I think that they mean 51. Now just waiting on JBD support for their feedback. Also considering that my normal CAT-5 cable is not quite correct according to some opinions of the diysolar tread. Will make new cable too depending on JBD feedback.

Hi @Scorp007 - after the url was not working for days on end, finally this page loaded, and I read the contents (only page 4 - the rest wont load) with great interest. ( https://diysolarforum.com/threads/anybody-tried-new-jk-bms-with-inverter-communication-support.68964/page-4) The symptoms reported by the guy testing the Growatt and Pylontech combination with the strange behaviour for fully charging and then not charging until almost completely discharged are very famliar, Previously I have had mand days where my battery completely discharges in the afternoon while i have the best sun orientation, but the Growatt inverter seem to refuse to charge the battery. At least I feel a bit more sane with my issue, not why I'm unable to load any other pages from the diysolarforum, hoping for a solution on the last page. I will try to get support from the relevant manufacturers... .

So I have been running the system as per @zsde 's suggestion, using US2 for the battery type and running the system without BMS comms - I made the change on the 19th, as can been seen in the screenshot attached. As a result the battery is being used much more, (great to see proper discharge and thus use of battery), but I still see strange logs for the battery, below is logs from last night: The inverter is configured to only charge with Solar, IE no charging from Utility, and yet I get the below output for around - > 3 am the battery voltage jumps up again. Either the Growatt is ignoring the Charge setting and using Utility to charge the battery, or the bms/battery is recovering its voltage from somewhere - even if it were ignoring it, I doubt it should be able to charge at such a rapid rate.. Possibly the only way to get a clear answer is to connect to the bms and see if the logs concur with the logs from the inverter. As per the suggestion, how would i find out which of the 50-99 for CAN settings would be right for this inverter to BMS protocol ? Is this CAN standard so non-standard ? Thanks again for reading !

Thank you @Scorp007 and @zsde I am relieved to hear that there are good experiences with the JDK BMS ! The Growatt seems to have 2 presets for CAN, I tested both, and the first one works better than the second (think the second one is for pylontech). One reason why I don't think the issue is with the CAN protocol is that the Indicator lights showing SOC mirror what I see in the Logs from the Inverter. I think I will try the option to run it on user mode 2 as per ZSDE's suggestion, as this would then eliminate the CAN as a source of problems, then i can concentrate on the remaining mystery. I'll provide feedback in a few days

Hi All I've got a 16 cell lifepo battery with a jbd-up16s010-l16s-100a BMS conneced to a Growatt 500ES inverter. Setup is working fine, and I dont really have issue with loadsheding, but I am unhappy with the SOC reported from the BMS to the Inverter. Cells are new EVE 105 and the BMS is a jbd-up16s010-l16s-100a (official site is down) https://www.alibaba.com/product-detail/JBD-Smart-BMS-36V-60V-48V_1600706175819.html The BMS boasts automatic SOC calibration, ie according to the specs learns the capacity from use. The inverter is configured to switch back to UTILITY on 65% SOC and back to Battery at 85%. Charging of battery is set to SOLAR ONLY. Communication is CAN. My issue is best shown in the below SOC graph provided by the Growatt app: The Inverter seems to report a fluctuating SOCy battery throughout the night, there is no charging happening from the Inverter and my consumption is low, especially in the first half of the graph, but the BMS (and I see this on the BMS display as well) seems to think the SOC low, then seems to change its mind and then reports an almost full charge. At all times, when I have checked individual Cell Voltage, its been over 3.2V, from my understanding the Cells are still full. I was wondering if anyone has experienced similar issues ? I have tried BMS reset, and already reset Capacity to 105 previously, but the issue returns within a few days. Since the BMS indicator lights and the SOC reported by CAN to inverter match up I dont see the CAN comms as the problem. Any advice from anyone ? I looked at the other similar SOC tread too, to wondered if its a BMS going to sleep issue, but then why would it turn back on? Or can anyone suggest another BMS with CAN support that actually works and is available in RSA? Thank you for reading Carl

Selling DALY active smart BMS and active balancer that I bought from AliExpress in Jan this year for a battery home build that I never did. R 2200, 2000 collect or courier from Cape Town at your cost. Note attached pictures, (including UART to USB and a spare Bluetooth module.. I bought by accident ) this BMS only has UART , not CANBUS support. Carl on OH SEVEN TWO 6138487. https://www.aliexpress.com/item/1005004522270222.html?spm=a2g0o.order_list.order_list_main.100.16321802OMyGFO

Hi @BritishRacingGreen thanks for the offer, I'm thinking that if that is really the case, I could just use a PI, your code and use a relay from the PI pins to control whether I supply the Inverter with Mains... Although a bit crude I'm pondering if I would achieve the same endgoal, ie to start using mains when my battery reaches 60 % SOC, and if that puts me into a loadshedding period at least I have the 60 % to hopefully bridge that gap. That would put me in the market for a Low Cost Inverter without CAN support... Anyone had any good experiences ? Thanks!

Hi All - I'm new to this forum, hope that my question makes sense. I have a 100 Amp 16S Daly Smart BMS that I am hoping to use to build a battery for my home solar system using 16 lifepo4 105ah cells (and approx. 2500 watt of PV). I would like to work out what Inverter to get for my system, there are many conflicting reports on integrating the inverter with the Daly BMS so that State of charge is available to the inverter. It seems that the cheaper inverters are still geared to using Voltage as the indicator, but this would not allow me to choose say a 60% cut off point for switching between Battery / PV priority to Grid etc, and would not give me the benefit of the extra savings, unless I am willing to run the batteries to zero all the time, (and create my own loadshedding issues). I see from the Daly videos that both CAN and RS 485 option is selectable in the bluetooth APP with a list of inverters, but from the posts on the net its not always a success story. I can't afford Victron (I would not be building my own battery) so I would love to hear from any folks that have had success connecting Daly to one of the cheaper inverters and have success in having SOC feed back to the inverter. Thank you! :