On November 8, Yokohama City, Tokyo Gas and Tokyo Gas Engineering Solutions (TGES, Minato-ku, Tokyo) will self-deposit excess electricity from solar power generation systems installed on the rooftops of six schools elementary and middle schools in Yokohama City. They announced that they have started providing documents to the Central Library.
Business plan
(Source: Joint release of Yokohama City, Tokyo Gas and TGES)
The system was implemented as part of the ``Renewable Energy Introduction Project for City-Owned Facilities'' for which the City of Yokohama selected Tokyo Gas as the operator. The project will install solar power generation equipment and battery storage at 65 elementary and middle schools through an on-site PPA (power purchase agreement) model, which will self-consume the generated power generate and deliver excess electricity to public utilities.
Solar panels installed on school roofs
(source: Tokyo Gas)
The total solar panel output at the 6 elementary and middle schools is 418kW, expected to annually provide about 170,000 kWh of surplus electricity for the Yokohama City Central Library. This corresponds to approximately 9% of Yokohama City Central Library's annual electricity use. In the future, we will gradually add more schools for self-deposit. The final plan is to provide about 452,000 kWh of surplus electricity annually to 25 schools, with a total panel capacity of 1,518 kW, equivalent to about 23% of annual electricity consumption.
By manually consigning excess electricity generated when elementary and middle schools have low electricity demand, such as on weekends and summer vacations, to the Yokohama City Central Library, which always Given a certain electricity demand, the renewable electricity generated can be used more efficiently, which also leads to reduced electricity bills. The expected CO2 reduction effect is about 207 tons per year.
A variety of activities, such as predicting power generation and power demand of generating equipment involved in self-depositing as well as creating and sending deposit plan values, are fully automated. using TGES's energy service facility remote management system ``Helionet Advance.'' Unbalance costs will be borne by TGES.
