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BI PV Urban Scale Project Details
Name projectJo-Town Rinku Hawaiian Village
Year2005-00-00 (Start operation date)
PV applicationInclined roof - integrated: PV roof tiles
PV power total kWp
LocationTajiri, Sennan, Osaka
Latitude/Longitude34°23'41"N 135°17'14"E
© Sakurafudousan CO., Ltd.

Project summary
In Jo-Town Rinku Hawaiian Village near the Osaka Kansai International Airport, all houses (236) have been installed with PV rooftop systems of 2 kWp. The PV rooftops consists of so-called PV rooftiles. In addition to the PV systems, whole-house energy efficiency is enhanced, with all houses either all-electrific or equipped with a gas co-generation system, called “Eco-Will”.

Urban scale PV aspects
Jo-Town Rinku Hawaiian Village is in Tajiri, Sennnan, Osaka, is located near the Kansai International Airport, approximately 60 minutes from center of Osaka city. The area is 22 100 m2 comprising 258 house compartments to form a PV community. All houses are equipped with PV systems. The community was developed by Jo Cooporation CO., Ltd. (proprietor) and Sakudafudousan Co., Ltd. (selling agency). Their strategy was to foster environment-consciousness to customers and expected customers to be first-time house owners.

Special PV project info
PV architecture and building integrationThe compartments before building houses were sold with carrying option to build a house equipped with PV system, and then, each house was designed and built on the compartment according to users’ (inhabitants’) requirements, including the choice of all-electric facilities or gas co-generation system. Based on the design of the roof, the energy consumption pattern, the solar insolation and a price level of house etc., the PV system capacity was standardized at 2kW.
Urban planning issuesThe compartments layout was developed, for the PV roof to face south as much as possible, and to create a well-designed appearance of the houses and a harmonized streetscape as a community, PV roof tiles were selected for the PV systems. The concept of the community development, ‘all houses would be equipped with PV systems’, was well accepted and handed down to the inhabitants. Also, 95% of inhabitants chose gas co-generation system while choice of all-electrified facilities was only 5%.
Economical and financial issuesTrade-offs in PV system capacity, roof geometry for maximum PV electricity output led to an increased house price. The PV system capacity was set at 2kW. In some houses, a governmental subsidized program for residential PV systems was available. Additional significant energy bill reductions resulted from energy conservation measures of high thermal insulation and high efficiency equipment.
PV ownershipBuilding owner: Inhabitant. PV owner: Inhabitant. PV energy user: Inhabitant.
Tariffs and metering
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. For the all-electric house, electricity tariff structure is different than usual. The daytime rate is higher, while in nighttime the tariff is discounted. This means the value of the PV electricity from inhabitant to the utility company is higher.
Info on grid issuesTo avoid negative influences against a grid network caused by a high-density of PV system installations in a limited area, a negotiation with a utility company (Kansai Electric Power corporation) was implemented. The electricity distribution line in the area was designed and constructed by the utility company, and each electric pole was installed for five houses, e.g. five PV systems.
Other infoThe project, Jo-Toen Rinku, is the biggest PV community in Kansai area (west side of Japan), and has been contributing not only to deploying areal PV system installation in residential area but also to increasing publicity of the project companies. Here, Sakurafudousan Co., Ltd., which is the selling agency of the project, has been promoting PV community in Kansai area other than this project. They are aspiring to create an environment-conscious community and to enhance a value of the community. Expected customers would be spread to ones who are well-aware of environmental problems. In their strategy, PV system is a main component of their community development.
Remarks and recommended readingIn cooperation with: Kubota corporation, MSK corporation.

Other project data
Type of projectCommercial project
Other relevant aspects
Start of PV project
Start operation PV system2005-00-00
Main project leading companySakurafudousan Co., Ltd., Jo-Cooperation Co., Ltd.
Main project contact person
Contact email
Contact address
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 project476 kWp
Number of dwellings/units236
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 / OMRON 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 website
Other websites
Webpage Educational Tool

1. Jo-TownRinkuHawaiianVillage.pdf (language: English)

(PV) roof tiles, (PV) rooftops