Pjs100 Posted May 19, 2022 Posted May 19, 2022 Hello, I have two Growatt SPF 5000 ES inverters connected with two Pylontech UP 5000 batteries with BMS communication enabled. That in it self was a challenge to get right. I also have 6 Canadian 550W panels connected to one of the inverters. My house consumes very little power on average meaning that often solar production is reduced below what it can deliver. I know this because if I place load on the system the solar produces much more. My question is the following: I know that I have additional watts available from the panels however the batteries never charge with more than 820w and 16A. Before the Battery BMS was sorted I regularly got battery charging of 1600w and 40A or more. Is this the charging level from the batteries BMS? Quote
Tinbum Posted May 19, 2022 Posted May 19, 2022 What the battery will request from the inverter will change with SOC but if not above about 95% SOC then it should be much higher. A single US5000 will accept 50A. ( Is that 1 inverter to 1 battery twice or 2 inverters to 1 battery pack of 2 batteries or 2 inverters each to 2 batteries?) Quote
Pjs100 Posted May 19, 2022 Author Posted May 19, 2022 (edited) 1 hour ago, Tinbum said: What the battery will request from the inverter will change with SOC but if not above about 95% SOC then it should be much higher. A single US5000 will accept 50A. ( Is that 1 inverter to 1 battery twice or 2 inverters to 1 battery pack of 2 batteries or 2 inverters each to 2 batteries?) Its 2 inverters to 1 battery pack with two batteries. Only one of the inverters received PV power from 6 550w panels. Edited May 19, 2022 by Pjs100 Quote
Pjs100 Posted May 19, 2022 Author Posted May 19, 2022 3 hours ago, Tinbum said: Have you got the parallel kit installed? Unsure. Will the attached photos show that? Photos Quote
Tinbum Posted May 19, 2022 Posted May 19, 2022 (edited) It looks as if you have. In the bottom batter pack though it looks as if the RS485 link cable is in the bottom RJ45 port. If it is it should be in the top one(link port0) You also have a cable in the RS485 and Can port where does the RS485 cable go to? In the second picture what is the yellow RJ45 cable? It looks as if that is plugged into no. 10 on the Growatt manual (RS485 communication port for expansion) Edited May 19, 2022 by Tinbum Quote
Pjs100 Posted May 20, 2022 Author Posted May 20, 2022 10 hours ago, Tinbum said: It looks as if you have. In the bottom batter pack though it looks as if the RS485 link cable is in the bottom RJ45 port. If it is it should be in the top one(link port0) You also have a cable in the RS485 and Can port where does the RS485 cable go to? In the second picture what is the yellow RJ45 cable? It looks as if that is plugged into no. 10 on the Growatt manual (RS485 communication port for expansion) Connection from battery to the Host Inverter: 1) Battery A/CAN to RS485 on inverter (that's the yellow one) 2) B/RS485 to BMS on inverter Thanks Quote
Tinbum Posted May 20, 2022 Posted May 20, 2022 1 hour ago, Pjs100 said: Connection from battery to the Host Inverter: 1) Battery A/CAN to RS485 on inverter (that's the yellow one) 2) B/RS485 to BMS on inverter Thanks That looks wrong. It should be either CAN or RS485 not both. Quote
Tinbum Posted May 20, 2022 Posted May 20, 2022 I would use CAN. Make sure only pins 4, 5 and (6) are connected in the CAN lead. Note though Growatt doesn't show a ground on its RJ45 Quote
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