AC SENSOR RELAY V1 3 работа с AC и DC током

I have already described here    • Реле с датчиком АС тока   working with this module. Now I decided to experiment with it - how it reacts to alternating and direct current. There was an idea to use it as a direct current sensor in the circuit from solar panels to the controller. So that my grid inverter would turn on automatically only when there is sun. And turn off when there is none. But no. It works stably only with AC current up to 5A.