Shirdi Sai Electricals Limited will make an initial investment of Rs 15,000 crore to build an integrated solar cell to module manufacturing facility at Ramayapatnam in Andhra Pradesh, its CEO Sharat Chandra said on Wednesday. The investments in the first phase are being made through subsidiary Indosol Solar to set up 5 gigawatts (GW) of moduleS, 5 GW wafers, 5 GW ingot and 5 GW glass capacities, he told PTI over the phone. "We have started the production of the module from Sunday (March 31). We call it Phase 1A, which is part of Phase 1.