Waiting time in activation of solar panels at individual house

I moved to my new house in November 2024.
A solar panel system was installed on the roof as part of the construction by the house maker.

But until now, we have been waiting for TEPCO (according to the house maker) to activate the solar panel system. So basically, it is not functioning yet, i.e not generating any energy to lower my bill and not generating any extra revenue. We were told to wait at least 6 months after construction.

Based on your experience, how long did you wait for TEPCO to activate your roof installed solar panel system?

by Old_Shop_2601