GPSS Holdings Inc.

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Grid Parity for Sustainable Society GPSS HoldingsGrid Parity for Sustainable Society GPSS Holdings

Solar Power GenerationSolar Power Generation

What we doWhat we do

  • ① Planning and Surveys

    We identify land suitable for power plant construction and carry out site surveys, testing variables such as irradiance and land slope.

  • ② Regional Partnership

    Formulate joint business development (including investment and fund procurement, etc.) with local communities, and at the same time form regional consensus on development and projects.

  • ③ Feasibility
    Studies

    Investigate candidate sites for legal restrictions. We also work to build more profitable power plants, taking responsibility for business risks surrounding assumed power generation volume.

  • ④ Application / Design

    After deciding on commercialization, we will design the power plant in detail, obtain ID from the Ministry of Economy, Trade and Industry and establish connection agreements with electric grid companies.

  • ⑤ Finance

    The financial division within the group is qualified as a Type 2 Financial Transaction Business and will raise funds necessary for commercialization.

  • ⑥ Power plant
    construction

    We will procure equipment and construct the power station in compliance with all laws and regulations.

  • ⑦ Grid Connection

    After completing construction, we sell power to the electric grid company by connecting the plant to the grid.

  • ⑧ Maintenanc
    and Management

    We will conduct remote monitoring on a 24-hour basis using specialised monitoring system. If there is abnormality in power generation, we carry out onsite maintenance and repair.

About Our SolarAbout Our Solar

We pursuing the improvement of solar power generation efficiency and maximization of power output. Balancing between work efficiency and cost, we are promoting the selection of components incorporating the latest design and construction technology, creating a highly efficient power plants to lower solar power generation costs.

Miniaturization and decentralization of PCSs to reduce power generation lossMiniaturization and decentralization of PCSs to reduce power generation loss

Power Conditioners (PCS) are necessary for converting the direct current generated by solar panels into alternating current. Thanks to the decentralization possible with compact PCSs power generation losses can be reduced earlier in the production pipeline than traditional large centralized PCSs.

Decentralized design case
using compact PCSs

High voltage power plant (completed in 2015)

ESCO Design Wiring to Reduce Power Generation InefficienciesESCO Design Wiring to Reduce Power Generation Inefficiencies

By reducing the diameter of the power cables used at solar power plants (ESCO design), the power loss during power generation was reduced from 3% to less than half of that. This technology has recently been featured in several prominent industry articles.

Power loss due to wire thickness

PCS Electric cable  A 80m Junction box Electric cable  B 30m ModulePCS Electric cable  A 80m Junction box Electric cable  B 30m Module
The thickness of the electrical cable  A (80m)The thickness of the electrical cable  B (30m)Wiring loss rate Standard construction example  (JIS standard [NEDO standard]) (38sq) (3.5sq) 3% Optimized construction example (GPSS standard) (60sq×2 cables) (5.5sq) 1.09%The thickness of the electrical cable  A (80m)The thickness of the electrical cable  B(30m)Wiring loss rate Standard construction example  (JIS standard [NEDO standard]) (38sq) (3.5sq) 3% Optimized construction example (GPSS standard) (60sq×2 cables) (5.5sq) 1.09%

※ECSO design is “optimum conductor size with respect to the operating environment and economy”. The concept that power loss at the time of energy transmission can be reduced by enlarging the conductor (size of the electrical cable.) – Electricity and Construction (Ohmsha) published in the 2017 June issue.

Introduction of PVsyst to allow for power generation estimates based on 3D designsIntroduction of PVsyst to allow for power generation estimates based on 3D designs

We are utilizing the internationally recognized 3D design software PVsyst to analyze plant designs and predict power generation amount taking into consideration the influence of terrain and weather changes. The influence of shade generators power generation can not be estimated during the design phase using traditional 2D software design software.

Comparison of Power Generation between JIS and PVsyst designs

JIS standard PVsyst Influence of surrounding shade generators Unconsidered Considered Peak Reduction Unconsidered Considered Power Output Loss※ Unconsidered ConsideredJIS standard PVsyst Influence of surrounding shade generators Unconsidered Considered Peak Reduction Unconsidered Considered Power Output Loss※ Unconsidered Considered

※When small and large panels are placed in the same panel array, power loss must
be estimated based on the smaller panels to achieve meaningful results.

3D design to prevent power generation loss3D design to prevent power generation loss

At present, ideal land for solar power plant development is becoming scarce, and construction of solar power plants on sloping land becoming necessary. Thanks to designing plants in 3D, it is possible to plan efficient panel layouts so that land can be used more effectively than if the layout was based on a 2D design.

Panel layout example on slope

  • Panel installation example
    on flat ground

    Constant Constant Constant ConstantIn flat places it is difficult for shadows to appear even if panels are placed at regular intervals.
  • 2D-based installations

    Constant Constant Constant ConstantOn sloped land shadows are cast upon panels, and power output is reduced. Pylon height is constant for ease of construction.
  • 3D-based installations

    No shadow interference!No shadow interference!become narrow become wide become widePylon length and position is calculated so that shadows are not cast on the panels. Pylon length varies according to need leading to challenges in construction.

Installation of solar panels along land topographyInstallation of solar panels along land topography

Technical expertise is required to actually implement a 3D-based installation. By installing panels along the topography you can effectively utilize the land and reduce the cost of construction.

Panel layout example on slope

Construction is challenging See the difference! No shadows are castConstruction is challenging See the difference! No shadows are cast

DevelopmentDevelopment

  • Roof-mounted (power generation construction)Total 867kWRoof-mounted (power generation construction)Total 867kW
  • Low voltage (power generation construction)Total 400kWLow voltage (power generation construction)Total 400kW
  • High voltage (power generation construction) Total 53,000kWHigh voltage (power generation construction) Total 53,000kW
  • Special High voltage (power generation construction) Total 20,000kWSpecial High voltage (power generation construction) Total 20,000kW

Land Owners Sought for PartnershipLand Owners Sought for Partnership

Solar Power Generation Application informationSolar Power Generation Application information

  • 1Land with an area of 10 square kilometres or more
  • 2Good sunlight, flat land (land not requiring redevelopment,
    such as golf courses, factory sites, etc)

※Both buying and leasing are possible. Land must be available for more than 20 years of continuous use in case of leasing. We are happy to also receive consultation requests regarding issues outside of the below cases. In the case of farmland, agricultural land designated in the agriculture promotion area development plan cannot be developed. If the land is not a designated part of the agriculture promotion aread development plan, it is possible to develop. We can carry out a free, basic survey to assess suitability for use as land for solar power genaration. Please contact the following address with the address of the land you would like surveyed.

Please do not hesitate to contact us Inquiries by phone Tel : [+81](0)3-6435-2391《Available from 10:00 to 18:00(Japan time)》Please do not hesitate to contact us Inquiries by phone Tel : [+81](0)3-6435-2391《Available from 10:00 to 18:00(Japan time)》Inquiry by e-mailInquiry by e-mail[+81](0)3-6435-2391

Other renewable energy fieldsOther renewable energy fields

  • Geothermal Power GenerationGeothermal Power Generation
  • Wind Power GenerationWind Power Generation
  • Small Hydropower GenerationSmall Hydropower Generation
  • Biogas Power GenerationBiogas Power Generation