Andymangs Posted June 16, 2023 Share Posted June 16, 2023 (edited) Good day friends, What does alarm code 70 mean? not in my handbook. Three x JR385Wp panels in series. Two x Greenrich U=P3686 5KW 50V LI Batteires One Kodak OG plus 5.48 No excom power, totally off-grid. Used to give power to small cottage. 6 days cloud, system shut down, had to connect four 12 v batteries in series to get the system to power up. Therafter it started to charge and batteires inidicate normal charging. But not getting above one of the 6 charge status lights. Watchpower says batteries at 13% Inverter display syas alarm 70 and the battery icon is flashing Should I be worried, or just givie it time? Edited June 18, 2023 by Andymangs correct spelling mistakes Quote Link to comment Share on other sites More sharing options...
Coulomb Posted June 17, 2023 Share Posted June 17, 2023 12 hours ago, Andymangs said: What does alarm code 70 mean? It's warning code (⚠) 70, and it means the BMS is saying that you must charge the battery. 12 hours ago, Andymangs said: Should I be worried, or just give it time? Just give it time, and if possible, charge. If it's new, it will take a few weeks to equalise the cells in the battery. Perhaps change the settings so that the inverter doesn't let the battery get so low before disconnecting the loads. Andymangs 1 Quote Link to comment Share on other sites More sharing options...
Andymangs Posted June 18, 2023 Author Share Posted June 18, 2023 I used four 12 batteries in series to couple in parallel to my two Greensrich 3686 (parallel) and this brought the system to life. Kept coupled for not more than 30 minutes to get some life into system. Then disconnected the 12V battery chain. Now solar seems to have pickedup and system is running. Watching carefully as it recovers and not using any load for now. Allowoing the two Greenrich batteries to restore to 6 lights first. We are totally off-grid. No sun = No power. System as been fine since installation Aug 2022. survives two full days of cloud. This last week of 6 days with no more than 3 hours sunlight has meant the system went down. Should have shut down automatically??? Cannot undersdtand why not. Quote Link to comment Share on other sites More sharing options...
madness_za Posted June 18, 2023 Share Posted June 18, 2023 You running BMS Comms to inverter or voltage mode? Quote Link to comment Share on other sites More sharing options...
jumper Posted June 18, 2023 Share Posted June 18, 2023 On 2023/06/16 at 3:42 PM, Andymangs said: Three x JR385Wp panels in series. One Kodak OG plus 5.48 Do you have the model with low or high voltage SCC? If you have a low voltage SCC just make sure you have enough headroom on the Voc of 3 panels in series going into the coldest months now for the first time. I have a very similar setup with the same amount of PV and 1x5kWh shoto battery and it takes a full day to charge 4kWh at this time of year, so it may take a few days to charge your batteries and balance them. If you want the system to shut down before the batteries run too flat you need to set the cutoff voltage higher, I think you need to set this regardless of whether you have battery comms or not. Quote Link to comment Share on other sites More sharing options...
Coulomb Posted June 18, 2023 Share Posted June 18, 2023 13 hours ago, Andymangs said: Should have shut down automatically??? Cannot understand why not. When you had the battery type set to AGM, that over-rides setting 29 (low DC cut-off voltage). The AGM cut-off voltage is very low, too low for an LFP battery. So hopefully with the battery type set to USE, and a sensible value in setting 29, you should be OK in the future. Your battery's BMS may be the type that doesn't automatically cut off the load when a cell get too low in voltage. That would also have saved the battery voltage from going too low. Andymangs 1 Quote Link to comment Share on other sites More sharing options...
Andymangs Posted June 19, 2023 Author Share Posted June 19, 2023 7 hours ago, Coulomb said: When you had the battery type set to AGM, that over-rides setting 29 (low DC cut-off voltage). The AGM cut-off voltage is very low, too low for an LFP battery. So hopefully with the battery type set to USE, and a sensible value in setting 29, you should be OK in the future. Your battery's BMS may be the type that doesn't automatically cut off the load when a cell get too low in voltage. That would also have saved the battery voltage from going too low. I have the battery set to Pylon, on advice from Greenrich. I will set to USE as this is an alternative I note another greenrich battery user has his set on. Quote Link to comment Share on other sites More sharing options...
Jacques Ester Posted June 19, 2023 Share Posted June 19, 2023 Even with the inverter set to Pylon you can still set the shutdown voltage. To be save I would change the Shutdown voltage to 46.5V or 47V. According my graphs of Pylontech batteries at 46V I am normally on 10% state of charge. This may differ from your batteries. Andymangs 1 Quote Link to comment Share on other sites More sharing options...
Andymangs Posted June 19, 2023 Author Share Posted June 19, 2023 17 hours ago, madness_za said: You running BMS Comms to inverter or voltage mode? I'm not suyre and would not know how to check this out. I'm not that skilled in Quote Link to comment Share on other sites More sharing options...
jumper Posted June 20, 2023 Share Posted June 20, 2023 (edited) 13 hours ago, Andymangs said: I'm not suyre and would not know how to check this out. On 2023/06/19 at 8:24 AM, Andymangs said: I have the battery set to Pylon, on advice from Greenrich. If you had the inverter set to Pylon and it was working then you have working comms to the battery, it will be a LAN cable from the battery to the BMS port of the inverter. You will probably also have a LAN cable between the batteries themselves so they can communicate with each other. You should leave it in PYL mode as it was and just change the cutoff voltage, the batteries will take care of setting the charge voltages and currents automatically. If you pull the data from the inverter using the USB port you could possibly ascertain what the voltages were when the batteries went flat to see what cutoff you need for your setup. Edited June 20, 2023 by jumper Quote Link to comment Share on other sites More sharing options...
Coulomb Posted June 21, 2023 Share Posted June 21, 2023 17 hours ago, jumper said: it will be a LAN cable from the battery to the BMS It will look like a LAN (ethernet) cable, but it's RS-485. People actually try to plug cables from inverters into ethernet ports on their computers, and the result is never good. Quote Link to comment Share on other sites More sharing options...
jumper Posted June 21, 2023 Share Posted June 21, 2023 5 hours ago, Coulomb said: It will look like a LAN (ethernet) cable, but it's RS-485. People actually try to plug cables from inverters into ethernet ports on their computers, and the result is never good. Oops, I didn't even think of that lol. System has been running for 10 months, so I figured it was all plugged in correctly, it was just for identification purposes Quote Link to comment Share on other sites More sharing options...
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