question

offgridfren avatar image
offgridfren asked

AUX1 and general flag not working

Hello, I have one multiplus 48/3000 and I'm trying to disable the grid and go full on batteries when the grid is not needed, the grid will be enabled only when the load is above 1850W and I want to charge the battery during the night from 22:00 to 7:00. Unfortunately with the standard ESS I cannot get it work so I used the programmable relay, the general flag and the generator start/stop.

the multiplus correctly switch to the grid when the configured load is above the value, when the load return to normal values he switch off the grid. this part works properly.

But when I try to close the AUX1 relay (both manually and both using the Cerbo relay port) the multiplus did nothing.

Do you think my configuration is correct?

thanks in advance

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Multiplus-IIRelayAssistantsgenerator auto start
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2 Answers
Jason - UK avatar image
Jason - UK answered ·

@offgridfren Starting with the obvious, do you have a grid selected in VE Configure, Grid Code selection?

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offgridfren avatar image offgridfren commented ·
Yes, the grid is selected, all the charger/inverter options are configured correctly. the system is working, unfortunately it's only the AUX1 control that is not working
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Jason - UK avatar image Jason - UK offgridfren commented ·

@offgridfren Check to see if 'Use Aux1 as disable FeedIn signal' is selected? If you are using Aux1 and you close the Aux1 connection whilst this box is selected, the Inverter stops doing anything. Have you tried Aux2?

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offgridfren answered ·

I solved the problem using external equipment. I'm using home assistant for the house automation and now I can control both the scheduled charge and the mains reconnection using different automations through modbus. now I have achieved the real zero grid feed-in

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