Buy the lowest cost 120kW solar kit priced from $1. . The following configurations make up a complete 120kva 120kW solar power plant: Optional solar mounting support, PV combiner boxes, and cables. PVMARS provides a complete turnkey PV energy storage system solution. After we complete production, the system delivered to you can be used immediately. . For a 120kW Solar Plant about 348 qty of poly solar panels of 345wp would be required or 240 qty of mon-perc solar panels of 500wp. For poly, Vikram / Renewsys Solar are reputable Indian brands which offer quality product at reasonable price. Trina Solar, Panasonic or Canadian solar well known. . This guide provides in installing a 120KW solar system. What is the. . Peak shaving and valley filling: by charging and storing energy at valley time and discharging energy at peak time, the electricity cost of customers can be reduced and the electricity charge at the power consumption end can be saved for customers.