We are also facing this question for the first time. Our solar company also installed such a de-icer. They said that should be sufficient. But if too much snow comes, they will have to come out.
That's exactly right. Do not do it yourself, because damage can occur. Just contact the company and they will know what to do. I just hope that not too much snow comes.
I also think, just hands off these things. It can become more expensive if damage occurs. The operating company has to come here, and usually it has already been installed. Depending on the snow conditions, it must then be put into operation.
I am not suicidal and climb onto the roof in winter. The manufacturer also warned me against it. That is why we have a snow removal system called „SnowAway“. It was installed during the new construction. However, it can also be retrofitted.
I am very satisfied with it and it has served us well in winter so far. I can only recommend it.