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BI PV Urban Scale Project Details
 
Name projectSengendai Sai-no-michi
CountryJapan
Year2005-00-00 (Start operation date)
PV applicationInclined roof - integrated: PV roof tiles
PV power total kWp
LocationKoshigaya, Saitama
Latitude/Longitude35°49'22"N 139°45'29"E
SengendaiSai-no-michi1.png
© Hakushin Co., Ltd.
PicturesPDF'sSub-projectsSummary

Project summary
In Sengendai Aya-no-Michi, Koshigaya city, is not far from Tokyo. In the land readjustment project in 2004, the city government held a competition for residential area development, which was won by Hakushin corporation. Hakushin built 25 house compartments in the area and promoted to develop a community of all-electric houses equipped with PV systems. All 25 houses are equipped with PV rooftops of 2 kWp each.

Urban scale PV aspects
Sengendai Aya-no-Michi is located in Koshigaya city, Saitama. Koshigaya city is a major urban area about 25km from Tokyo area, and the urban development has been implemented according to ‘Koshigaya city urban planning master plan’. In the land readjustment project in 2004, the city government held a competition for residential area development. Hakushin corporation proposed a concept of ‘Harmony of Ecology & Community: Shine and Wind, Green and Water, Approach for Communication’ and the proposal won the competition. Hakushin was allowed to develop and sale 25 house compartments in the area and promoted to develop a community of all-electric houses equipped with PV systems.

Special PV project info
PV architecture and building integrationTo create a well-designed appearance of the houses and a harmonized streetscape as a community, it was decided that roofing geometry of all houses was designed as gable roof laid out to tilt at a 30 degrees angle from a compartment boundary. Due to the shape and direction of the compartments, south-faced geometry was difficult. The solution design layout in PV modules facing the south-east direction. PV roof tiles were selected for the PV systems and, based the roof design, an energy consumption pattern and a desired house price level, etc. the PV system capacity was standardized at 2kW.
Urban planning issues
Economical and financial issuesThere were no available subsidy programs for residential PV systems, at this time. 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 meteringNet-metering
Info on grid issuesTo avoid negative influences against the grid network caused by a high-density of PV systems installation into 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 infoIn 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 the PV system. In the center of the community, there is a stone-paved approach for inhabitants and a corridor of water along the approach. Rain water is used for the corridor and pump power is supplied from the PV system.
Remarks and recommended readingIn cooperation with: Kubota corporation and MSK corporation. 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 system2005-00-00
Main project leading companyHakushin Co., Ltd.
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 project50 kWp
Number of dwellings/units25
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 / MSK corporation
PV inverter brand and typeKubota corporation / MSK corporation

PV cost and energy production
Total PV system investment700000 Euro
Subsidy
Average PV modules only costs
Total PV energy yield0 kWh
PV energy user owner

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

PDF's
1. SengendaiSai-no-michi.pdf (language: English)

Keywords
(bipv) building integrated pv, (PV) rooftops

PicturesPDF'sSub-projectsSummary