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BI PV Urban Scale Project Details
Name projectVilla Garten Shin-Matsudo & Tiara Court Kasukabe
Year1999-00-00 (Start operation date)
PV applicationInclined roof - mounted
PV power total kWp
LocationMatsudo & Kasukabe, Chiba & Saitama
Latitude/Longitude35°49'22"N 139°55'27"E
© POLUS Group

Project summary
A target for the project was to deploy residential PV systems with the housing sector playing a role in PV system installation in a residential area and to create a practical case study. The target wa achieved and a massive and creative project where all houses are equipped with PV systems was launched in two areas of the Tokyo metropolitan region, e.g. 36 PV houses in Matsudo, Chiba, and 35 PV houses in Kasukabe, Saitama. These projects set a precedent for concentrated installation of residential PV systems, e.g. ‘PV community’, and were given ‘New Energy Award in FY1999’ in Japan. The projects were practical case studies of developing a community equipped with PV systems and since then, similar projects were launched in various regions. As for the Matsudo project (Villa Garten Shin-Matsudo), five additional houses equipped with PV systems were constructed and the community now consists of 41 PV houses in total.

Urban scale PV aspects
A harmonization between a house and PV system was well discussed at the beginning of planning. Insolation condition, azimuth orientation and inclination of roof, appearance of house, etc. were considered house-to-house and the design for obtaining a maximum electricity generation from PV system was adopted basically. In addition to PV systems, various kinds of facilities for energy conservation, reducing demand of air-conditioning were designed thus improving availability of equipment.

Special PV project info
PV architecture and building integration
Urban planning issues
Economical and financial issuesInstalling lots of PV systems in a limited area, as well as bulk buying, worked for reducing installation cost. 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.
PV ownershipBuilding owner: Inhabitant. PV owner: Inhabitant. PV energy user: Inhabitant.
Tariffs and metering
Info on grid issuesBecause there was no experience of such a high-density PV systems installation into a limited area, a precise negotiation with a utility company (Tokyo Electric Power corporation) was implemented to avoid negative influences against a grid network. Although the negotiation required much time, the PV system provider prepared preliminary test data on grid-connection with multiple inverters and no negative impacts were forecasted in their operation. These preparatory efforts by project members made the project successful.
Other infoThis project was a ‘Pioneer’ of concentrated installation of residential PV systems and has been contributing to deploying residential area PV system installations. House sector’s positive action for environmental protection has realized increasing consumers’ concerns for energy conservation and environmental problems. In addition, publicity for the project companies was increased.
Remarks and recommended readingLatitude Villa Garten Shin-Matsudo:N35 49’ 22” Longitude Villa Garten Shin-Matsudo: E139 55’ 27” Latitude Tiara Court Kasukabe: N35 58’ 21” Longitude Tiara Court Kasukabe: E139 45’ 32” Energy yield per year: 2 800 – 3 050 kWh/3kW/year (calculated) + 2 840 kWh/3kW/year (calculated) Other project company: Sharp corporation.

Other project data
Type of projectCommercial project
Other relevant aspects
Start of PV project
Start operation PV system1999-00-00
Main project leading companyChuo Jutaku Co., Ltd.
Main project contact person
Contact email
Contact addressPOLUS group, Koshigaya-shi, Saitama, 343-0845, Japan
Includes PV database projectsVilla Garten Shin-Matsudo
Tiara Court Kasukabe

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 - mounted
PV power total urban project123 kWp
Number of dwellings/units41
PV power per dwellings/units2 kWp
Main PV system typesGrid-connected - demand side
Main PV module typesFramed - regular module
Main PV cell typesCrystalline silicon - unknown other or mixed
PV module brand and typeSharp Corporation
PV inverter brand and typeSharp Corporation

PV cost and energy production
Total PV system investment1 Euro
Average PV modules only costs
Total PV energy yield0 kWh
PV energy user owner

Projects website
Other websites
Webpage Educational Tool

1. VillaGartenTiaraCourt.pdf (language: English)

(bipv) building integrated pv