As individual resident want to install solar panels

I am residing in state Haridwar, Uttarakhand. When I seek permission for installation of solar panels at above our balcony, we are staying at top floor (due to faulty design, shade which is constructed by us on our expenses) and approval for NET metering , received builder response in writing- "Please understand that being a builder we would only be able to construct the towers as per the approval received from the competent authorities. Hence, we would not be able to go against the byelaws. Please note that we have already consulted all the relevant parties involed beforehand to ensure that there is no miscommunication regarding your concerned query. Unfortunately, we would not be able to honor your request. we would not be able to assist you regarding this query. We still stand by the fact that once RWA will be established, they will take up the matter with the relevant authorities." I suppose builder deviating matter, model bye laws 171 applicable in Uttarakhand also. Kindly advise , what to do.