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BI PV Urban Scale Project Details
Name projectCosmo-Town Yumemino Saizu Licht paadje
Year2003-00-00 (Start operation date)
PV applicationInclined roof - integrated: PV roof tiles
PV power total kWp
LocationMatsubushi, Saitama
Latitude/Longitude35°55'34"N 139°49'17"E
© Hakushin Co., Ltd.

Project summary
Yumemino Licht paadje is located in Matsubushi-town, Saitama. A development of the area was planned and promoted by the Urban Renaissance Agency of Japan (the UR). Hakushin corporation proposed a concept of ‘Earth friendly town’ and was allowed to develop and sell 90 house compartments in the area. Taking advantage of their experience of ‘Kiyomino PV town’, Hakushin promoted developing a PV community, e.g. all houses equipped with PV system. In addition, all houses were all-electric in this community.

Urban scale PV aspects
Yumemino Licht paadje is located in Matsubushi-town, Saitama. Hakushin corporation was inspired by the Nieuwland 1MW urban PV project in the Netherland (which gave the name Lichtpaadje to the project) and developed 88 house compartments in the area, under the concept of ‘Earth friendly town’ with about 2 kWp PV per house. The 88 houses are an integrated urban development.

Special PV project info
PV architecture and building integrationTo create a well-designed appearance of the houses and a harmonized streetscape as a community, PV roof tiles were selected for the PV systems. It was decided that roofing geometry of all houses be designed as a gable roof and PV modules were installed on the south-face of the roof. Based on the design of the roof, an energy consumption pattern and a price level of house etc. a capacity of PV system was standardized as 2kW.
Urban planning issuesAt the beginning of development, it was planned to develop built-for-sale houses equipped with PV and all-electric facilities. However, many customers had a great deal of empathy for their plan and concept to coincide with release, most of the compartments was sold before building houses.
Economical and financial issuesThe target was to reduce the price level of the houses while keeping a quality and performance of houses. Due to the PV system capacity and the roof geometry design for maximizing amounts of PV electricity the house price increased, the capacity of PV system was then limited to 2kW. Investment costs PV: 800.000 – 850.000/kW
PV ownershipBuilding owner: Inhabitant. PV owner: Inhabitant. PV energy user: Inhabitant.
Tariffs and metering
The PV system received a governmental subsidy, available through Japan’s residential PV program. After starting operation, a net-metering scheme was applied so that surplus PV is traded between the inhabitant and the utility company, at the same price of the residential electric tariff.
Info on grid issuesTo avoid negative influences against a grid network caused by a high-density of PV system installation in a limited area, a precise negotiation with a utility company (Tokyo Electric Power corporation) was implemented. The electricity distribution line in the area was designed and constructed by the utility company, and each transformer was set for four houses, e.g. four PV systems.
Other infoThis ‘Yumemino’ project was implemented by taking advantage of experiences of ‘Kiyomino’ project. In this project, an all-electric house is standardized and all houses are equipped with a high-efficiency electric water heater, called “Eco-Cute”, as well as PV system. Then, the project was attention-getting as a high efficiency all-electrified community and contributed to increasing publicity of the project companies.
Remarks and recommended readingOther project company: Kubota corporation. Contact tel. MSK corporation: Tel: +81-3-3342-3838 FAX: +81-3-3342-6534

Other project data
Type of projectCommercial project
Other relevant aspects
Start of PV project
Start operation PV system2003-00-00
Main project leading companyHakushin Co., Ltd. and Urban Renaissance Agency
Main project contact person
Contact email
Contact addressMSK corporation, Shinjuku, Tokyo, 160-0023, Japan
Includes PV database projects

Urban district data
Kind of urban areaResidential - urban
Main building typesHouses - single house
New/Retrofit/AddedNew building integration
Main PV area address

PV systems
PV applicationInclined roof - integrated: PV roof tiles
PV power total urban project180 kWp
Number of dwellings/units88
PV power per dwellings/units2 kWp
Main PV system typesGrid-connected - demand side
Main PV module typesPV building elements - PV roof tile
Main PV cell typesAmorphous silicon
PV module brand and typeKubota corporation
PV inverter brand and typeKubota corporation

PV cost and energy production
Total PV system investment
Average PV modules only costs
Total PV energy yield0 kWh
PV energy user owner

Projects websitehttp://www.hakushin.com
Other websites http://www.msk.ne.jp/
Webpage Educational Tool

1. Cosmo-TownYumeminoSaizuLichtpaadje.pdf (language: English)

(bipv) building integrated pv