Hi,
I have a Victron Multiplus-ll 48/5000/70-50 with cerberoCX , 2 MPPT 250-100 and 2 Pylontech US5000C 4.8kWh. My Question : What would be the best way and how to do it. My 24 Pannels on the roof are able to charge my batteries to 100% arround mid-day , since I do not deliver back to the grid my mppt’s are pulling the power down to the actual consumption. I would like to control the power charge and switch automatically devices like boiler/heating on and use the full solarpower if still available without using the batterie power ? Thank you Claudio
Hi @pipo ,welcome ,
if the 2 realays from the cerbo are enaugh for you,then you can switch them with node red,which can be installed on the cerbo with the large firmware image…then you would need additional power relays which are turned on/off by the cerbo relays because they are low voltage and low power once…Ive done it with 5VDC /250Vac 10A .So you have the 5Vdc going through the cerbo relays and once turned on you switch the power relays…With node red you have got then the option in base of for example SOC,battery discharge,PV power and maybe a timer to programm the switching of the relays…It’s a bit trial and error,having some patients and google around a bit…The good news is,it’s not impossible 
Frank
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Check out this Victron video on the use of node red where a campsite is basically doing the same thing
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There is also ac2 out in the inverter, that is programmable to be switched on soc for bigger loads.
Nice @drs68 ,this is a very good starting point,there are several training videos regarding node red.
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