Relays in Cerbo GX to operate wet bay heaters

[mctibbe (Mark and Roni Tibbe)]

Hi. I have a Cerbo GX and want to use the relays to operate wet bay heaters in my RV. I already have temp sensors in both wet bays. I want to use 12V, 100 Watt, 8.33 Amp heaters. Can I wire them directly into the relays so I can program the Cerbo to turn them on and off using the temp sensors? Or do I need another relay between the heater and the Cerbo relay because of the amperage? Any help would be greatly appreciated.

[pwfarnell]

Go to the Cerbo GX product page, scroll down to downloads and download the datasheet, it gives the relay specs.

https://www.victronenergy.com/communication-centres/cerbo-gx

You will need to drive another relay. Beware, many people have burnt out Cerbo relays, but a relay with a flyback diode or add one yourself.

See the FAQ

Using inverter / MPPT / GX device programmable relays with higher current, inductive or capacitive loads

Many Victron products have programmable relays included which can be used to send signals between each other or to control small loads. These ae typically rated as for the Cerbo GX as DC up to 30 VDC: 6 A DC up to 70 VDC: 1 A AC: 125 VAC: 6 A There have been many reports within the community from people who have burnt out the contacts or welded the contacts closed in the programmable relays in their systems. This is often caused by connecting the relays to inappropriate loads, sometimes loa…

[mctibbe (Mark and Roni Tibbe)]

thx