We are designing and off grid system with a solar array though a couple of Smart MTTPs. There is almost certainly a Cerbo GX in the system. During the day when the SOC reaches 100% we would like to be able to send any further solar energy to a simple DC heater. This would need to switch out when the MTTP were no longer exceeding the normal system load.
We hoped to program the Cerbo relay to control a high power relay. Is this possible. Or is there another way. I noted the Cerbo info state "diverts excess (solar) power to self-consumption" but fail to find an explanation.
Many thanks for all contributions