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tpwchr avatar image
tpwchr asked

How to use both Cerbo GX relays?

Hello everyone.

I need to use one relay for the Genset to switch ON when the battery bank (Pylontech) SOC goes down to 20% (lets say). and stop when the batteries get charged.


I also need a second relay for a device that needs to know the battery charge, ie that it will turn ON only when the batteries are full.It just needs the signal. How do I program this? In the comparisson table (https://www.victronenergy.com/live/venus-os:start#comparison_table) it says that the Cerbo has 2 x NO/NC.


Is this enough for what I need? (genset+the other device)


Thanks a lot

cerbo gxGeneratorRelay
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2 Answers
wkirby avatar image
wkirby answered ·

Relay 1 can be programmed for a generator start / stop between lower and upper states of charge.
Relay 2 is manual control, no progammable options.

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tpwchr avatar image tpwchr commented ·

How can I do it if I need a second realy for it?

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Vance Mitchell avatar image Vance Mitchell tpwchr commented ·

Are there any other components in your system which have a relay or load output?

A BMV can have its relay programmed to switch at a certain SOC, likewise the smaller MPPT controllers have the load output which is programmable.

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hmurmur answered ·

I am trying to add a controllable circuit to the Cerbo GX. I want the Cerbo to sense low battery level and turn off the 12v refrigerator until the battery level comes up to an appropriate voltage. Ex frig off at 12.2 volts, back on at 12.4 volts. A NC relay should do this. Can I use the digital input with alarm to do this on the Cerbo GX?

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