Residential 4 kW Solar Kit Installation

I already have a complete 4 kW solar kit on site and now need a qualified installer to get it up and running on my home. The house has a flat roof, clear of any shading or obstructions, so access and panel layout should be straightforward... (Budget: ₹1500 - ₹12500 INR, Jobs: Construction, Electrical Engineering, Electronics, Engineering, Installation, PLC & SCADA, Renewable Energy Design, Solar Panel Installation)