Minimizing the cost of solar photovoltaic system in new office buildings in Indonesia Available to Purchase

The implementation of green building is believed to be a key factor in achieving sustainable development in the building sector. The Green Building Council Indonesia is responsible for the development and deployment of green buildings in Indonesia, and has released version 1.2 of the Greenship rating tools for evaluating new green buildings. The use of renewable energy sources in green buildings is highly encouraged, with one point awarded for every 0.5% of energy usage covered by renewable energy, up to a maximum of five points. The installation of rooftop PV systems is a popular choice for renewable energy in many governmental green-rated buildings, but it is important to determine the ideal capacity to prevent overpriced installation costs. This paper proposes a method where the focus is on gaining maximum points in renewable energy and minimizing investment costs, rather than maximizing installed capacity. This approach can reduce capacity by up to 68%. Another important consideration is choosing the optimum grid connectivity type, and the paper discusses the options of on-grid or zero export schemes. Zero export scheme is chosen for this case since the capacity of the PV system is much smaller than the grid power connection.