Jaco Ebersohn

Good day, I have a Phocos unit installed and use it in SUB mode. During the day, it would use solar to feed the loads and charge the battery. During the night, it will use the grid and switch to batteries when the grid is not available (load shedding). The SUB for source output priority should do what you're asking for. Please check your : 1) To grid battery voltage 2) Back to battery voltage 3) Shutdown battery voltage Do you know if you have a BMS connection between the batteries and inverter ? This will be required in order to get a more accurate state of charge (SOC) from the batteries. See below my configuration for the output settings: I have invested in Solar Assistant a few months ago to better manage how the inverter must switch between the SUB & SBU modes. With this you can optimise battery usage and tell the inverter when to switch to grid and when to use batteries. See the picture below of the configuration I typically use. Hope this helps ? Regards, Jaco

Hi Jumper, Thank you so much for the information. I'll work through this and let you know. Jaco

Good day, I am newbie and would appreciate any advise, please. I have the following installed: Phocos PSW-H 5kW Shoto SDC10-Box5(16S) 5.12kWh battery 12 x 410w bifacial solar panels The unit was installed without a BMS communication cable. I've done some research and found that Phocos does support the Shoto SDA10-48100 battery modules using RS485/Modbus. I made a cable as shown in the diagram below and updated the firmware on the Phocos inverter and display unit to 06.19 as recommended (latest firmware available from Phocos) I have set the Battery type on the Phocos to RS-485 (MODBUS RTU) as recommended. However, an alarm goes off after about 5 minutes stating that the inverter was unable to communicate with the battery. Do you know if the BMS in the Shoto SDC10 and SDA10 models are the same ? I am also not sure if the cable must plug into RS485 A or B ? I've contacted Phocos as they say that port A must be used. I've tried both with no luck. Secondly, all dip switches on the battery are off as I only have a single battery at this stage. Any help or advise would be highly appreciated. Best regards, Jaco

Hi Sama, I see Valsa sells these. I am planning to purchase one too. Phocos Any-Grid™ Series | Johannesburg, South Africa. (valsa.co.za) Regards, Jaco