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BI PV Urban Scale Project Details
 
Name projectPal Town Josai-no-Mori
CountryJapan
Year2006-00-00 (Start operation date)
PV applicationInclined roof - mounted,
Flat roof - mounted & mechanical fixing
PV power total kWp
LocationOta, Gunma
Latitude/Longitude36°18'32"N 139°20'6"E
PalTownJosai-no-Mori.png
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Project summary
The number of PV systems to be installed in this project eventually reached to 553 houses and total capacity is 2 310kW, one of the world’s largest residential clustered PV systems connected to a single distribution line. The project is being implemented with the cooperation of Tokyo Electric Power Co., Ltd. together with a R&D consortium. This demonstrative research aims to evaluate performances and capabilities of the PV systems, examine their negative influence on distribution lines, and develop the technology to resolve potential issues.

Urban scale PV aspects
A large number of PV systems have been installed on the roofs of houses in the new “Pal Town Josai-no-Mori” residential complex in Ota City, Gunma Prefecture, as a demonstrative research project commissioned by NEDO, and all PV systems have been connected to the power grid as a cluster. The number of PV systems to be installed in this project eventually reached to 553 houses and total capacity is 2 310kW, one of the world’s largest residential clustered PV systems connected to a single distribution line.

Special PV project info
PV architecture and building integration
Urban planning issuesTo implement a demonstrative research project on clustered PV systems, NEDO held a competition of project proposals. Ota city submitted their proposals and it was adopted. Although Ota city had had their original plan of developing residential community without installing PV systems, they changed the plan for applying the competition and this PV community was realized.
Economical and financial issuesA cost of PV systems is paid by NEDO, and the PV systems are owned by NEDO during the demonstration period.
PV ownershipBuilding owner: Inhabitant. PV owner: NEDO. PV energy user: Inhabitant.
Tariffs and metering
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 issuesIn order to promote the introduction of PV systems smoothly and in a reasonable manner, this project aims to develop the generalized technology, which will prevent the suppression of clustered PV system’s output caused by the excess voltage on the distribution system, and to demonstrate their effectiveness using actual installed clustered PV systems. Along with these aims, following technologies are demonstrated from viewpoints of the follwoing grid issues: - Output suppression avoidance system; - Centralized control system; - New type islanding protection system;
Other infoReversed power flow from battery system is prohibited.
Remarks and recommended readingEnergy yield per year: PV Output is controlled by energy management system under R&D planning. Other project companies: Meidensha Corporation, Electric Power Engineering Systems Co., Ltd., Shin-Kobe Electric Machinery Co., Ltd., Matsushita Ecology Systems Co., Ltd., OMRON Corporation, Tokyo University of Agriculture and Technology, Nihon University & Ota City Office

Other project data
Type of projectDemonstration Project
Other relevant aspects
Start of PV project
Start operation PV system2006-00-00
Main project leading companyKandenko Co., Ltd. & NEDO
Main project contact person
Contact email
Contact addressKandenko Co., Ltd., Minato-ku, Tokyo, 108-8533, 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 - mounted,
Flat roof - mounted & mechanical fixing
PV power total urban project2160 kWp
Number of dwellings/units553
PV power per dwellings/units3 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 typeSANYO Electric Co., Ltd., Kyocera corporation, Sharp corporation, Mitsubishi Electric corporation & Matsushita Ecology Systems Co., Ltd.
PV inverter brand and typeSANYO Electric Co., Ltd., Kyocera corporation, Sharp corporation, Mitsubishi Electric corporation, Mitsubishi Heavy Industries, Ltd., Matsushita Ecology Systems Co., Ltd.(trial product)

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

Websites
Projects website
Other websites
Webpage Educational Tool

PDF's
1. PalTownJosai-no-Mori.pdf (language: English)

Keywords
(bipv) building integrated pv

PicturesPDF'sSub-projectsSummary