A number of developers admit that they have not dared to embed rooftop solar power plants because of the high costs that must be spent. According to Fabby, Executive Director of IESR, the procurement of rooftop solar panels on a large scale for housing needs will also make the price of solar panels cheaper than retail prices. Large-scale doubling of rooftop PLT for housing can reduce the cost of solar panels by 15% from the retail price of Rp 15 million
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