October 15, 2025Oct 15 Hi Guys, Some advice here please,I have a RCT ( Axpert ) 8KW - Max 11Main Cpu firmware is 00054.01Secondary firmware is 00022.11Set for solar charging onlyWhen set to SUB ( CURRENT SETTING ) The inverter works fine and draws from utility if pv is not enough. I'm happy with this.As soon as the Batteries ( Pylontech with Bms ) hit 100% charge the inverter drops the PV and draws only from Utility.**When set to SBU The inverter does Not draw from PV at all. It still draws from Utility - not batteries- Although there is more than enough PV.When the battreries reach 100% charge the inverter drops utility for a few seconds - Draws from the battery for a minute then Changes to draw from utility Only.I have resorted to Dropping the AC breaker at sunrise then switching AC back ON at night.ANY IDEAS ??I'm in the process of adding the the battery bank this weel - Then hoping to use SBU as battery capacity will be more than enough to last the night.I have tried another inverter ( Mecer 8kw ) Exact same issue.
October 15, 2025Oct 15 33 minutes ago, TERRENCE P said:Hi Guys, Some advice here please,I have a RCT ( Axpert ) 8KW - Max 11Main Cpu firmware is 00054.01Secondary firmware is 00022.11Set for solar charging onlyWhen set to SUB ( CURRENT SETTING ) The inverter works fine and draws from utility if pv is not enough. I'm happy with this.As soon as the Batteries ( Pylontech with Bms ) hit 100% charge the inverter drops the PV and draws only from Utility.**When set to SBU The inverter does Not draw from PV at all. It still draws from Utility - not batteries- Although there is more than enough PV.When the battreries reach 100% charge the inverter drops utility for a few seconds - Draws from the battery for a minute then Changes to draw from utility Only.I have resorted to Dropping the AC breaker at sunrise then switching AC back ON at night.ANY IDEAS ??I'm in the process of adding the the battery bank this weel - Then hoping to use SBU as battery capacity will be more than enough to last the night.I have tried another inverter ( Mecer 8kw ) Exact same issue.What is your cut off settings? And the SOC setting for returning to PV and battery when the set battery SOC is hit? My inverter worked similar to what you describe and those 2 settings where my culprit.
October 16, 2025Oct 16 Author Hi Denns, I was under the impression that when I select Pylon in he settings - All the parameters are set automatically ?? Am I missing something? I did go through the settings and nothing can be changed manually
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.