Visit to Plant

Rooftop Solar Plant Strengthens BCP Through Self-consumption of Power

2018/05/15 18:15
Yasuto Todo, Nikkei BP Intelligence Group, CleanTech Labo
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Self-consumption-type adopted for 1st time

A brand-new five-story large-scale logistics building comes into view at a good location adjacent to the Wako-kita Exit of the Tokyo-Gaikan Expressway after a roughly 10-minute drive northward from Wakoshi Station on the Tobu Tojo Line in Saitama Prefecture. It is the "SG Realty Wako" that SG Realty Co Ltd (Kyoto City) completed on March 1, 2018 (Fig. 1).

Fig. 1: External appearance of the "SG Realty Wako" large-scale logistics building (source: SG Realty)

SG Realty runs real estate lease, management and development businesses in the SG Holdings Group. The company has set up solar power generation systems on the roofs of 98 logistics buildings, approximately a third of its about 300 logistics buildings across Japan. Solar panels with an output of 862.38kW were also set up on the folded-plate roof of SG Realty Wako (Fig. 2).

Fig. 2: A self-consumption-type solar facility was set up on the roof. (source: SG Realty)

Using the feed-in tariff (FIT) scheme, thus far, SG Realty has sold all power generated by the rooftop solar power generators it has set up on its logistics buildings. At the SG Realty Wako, however, the company adopted the method of consuming the generated power by itself for the first time. The power transmitted from the PV inverters is boosted to 6.6kV in the cubicle before being connected to the grid in-house.