Achievement

Okayama Project (2000KW)
Completion Date: August 2025 (Expected)
Items/Services Provided:
- Aluminum cable: 5,000 m
- Hybrid terminal connectors: 200 pcs
Outcome:
Copper cable theft has become a growing concern... Aluminium, while offering comparable performance for many applications, presents a much lower incentive for theft—making it a smart and cost-effective alternative for utilities, solar farms, and industrial facilities. GBP K.K. aluminium solutions not only enhance operational security, but also reduce material costs and weight, contributing to more efficient and resilient systems. This theft-mitigation approach has already proven successful in Japan and can be readily adapted to similar risk environments around the world.

Aomori Project (20MW)
Completion Date: June 2025 (Expected)
Items/Services Provided:
- 40,000 panel replacements
- Panel installation (40,000 units)
- 18 junction box replacements
- Junction box installation (18 units)
Outcome:
One of our utility-scale solar power projects in Japan, approximately 25% of the installation was damaged due to a severe snowstorm. Acting as the EPC prime contractor, GBP K.K. is responsible for providing both materials and labour and is now undertaking a full-scale restoration, aiming to complete all recovery work within a four-month timeframe With our proven track record in Japan and our expertise in delivering tailored, high-quality solar module replacements, GBP K.K. is ready to extend these services to international markets—particularly in regions vulnerable to extreme weather events. Whether it’s snow, wind, or UV degradation, our bespoke solutions and rapid deployment capabilities can help global asset owners protect and prolong the lifecycle of their solar investments. the lifecycle of their solar investments.

Tochigi Project (21MW)
Completion Date: March 2025
Items/Services Provided:
- High-voltage aluminum cable: 2,000 m
- Hybrid terminal connectors: 32 pcs
- Crimping tool
Outcome:
In response to customer concerns regarding the risk of theft of PV trunk cables, GBP K.K. implemented Japan’s first JET-certified high-voltage aluminium cables as a proactive security measure. GBP K.K.'s JET-certified aluminium cables not only reduce material costs and weight but also meet stringent safety and quality criteria—making them an ideal choice for utility-scale solar projects and infrastructure in both domestic and international markets.

Saitama Project (2MW)
Completion Date: April 2025
Items/Services Provided:
- 600V aluminum cable: 7,100 m
- Hybrid terminal connectors: 250 pcs
- Crimping tool
Outcome:
GBP K.K.'s aluminium cables were selected over several competitors because they are fully certified with both PSE and JET approvals, which qualifies them for insurance coverage under leading insurance providers.

Iwate Project (2MW)
Completion Date: June 2025
Items/Services Provided:
- High-voltage 1100 kVA transformer: 1 unit, including installation
Outcome:
In a project that involved transitioning from a central inverter system to a distributed inverter configuration, GBP K.K. supplied a custom-engineered outdoor unit that integrates a high-voltage transformer and an AC combiner box into a single compact solution. GBP K.K. specialise in developing customised hardware for complex solar upgrades and retrofits with experience across both domestic and international markets and well-positioned to deliver innovative, project-specific solutions to solar developers, EPCs, and O&M providers worldwide.

Aomori Project (8.83MW)
Completion Date: April 2025
Items/Services Provided:
- Custom-made junction boxes: 26 units
Outcome:
GBP K.K. provide diagnostic assessments and lifecycle extension services for ageing PV infrastructure. Whether for individual components or full system retrofits, our solutions are designed to maximise asset performance, reduce O&M burden, and enhance long-term return on investment. This approach to preventive renewal isn’t just for Japan—it’s a globally scalable strategy for asset owners seeking to safeguard energy output and reduce operational risks across the lifespan of their solar assets.

Tochigi Project (20MW)
Completion Date: December 2024
Items/Services Provided:
- 3,300V 400 sq aluminum cable: 11,000 m
Outcome:
GBP K.K. deliver JET- and PSE-certified high-voltage aluminium cables that are fully insurable, performance-tested, and ideal for high-risk regions. By helping this client restore operational reliability and regain insurability, we’ve proven that infrastructure security can be achieved through smart material choices. As theft-related losses increase globally, GBP K.K.'s solutions can be deployed internationally to protect solar assets, maintain investor confidence, and ensure uninterrupted power generation.

Miyagi Project (30MW)
Completion Date: October 2024
Items/Services Provided:
- Old model solar panels: approx. 15,000 units
Outcome:
Discontinued or damaged panels can create major operational challenges for asset owners—particularly in maintenance, insurance claims, and system compatibility. GBP K.K. specialise in manufacturing custom-fit replacement panels that replicate the original module’s size, output, cell configuration, and connector type, even when the model is no longer available on the market. With over 800 module models supported and a track record of success across Japan and overseas, GBP is ready to help global partners maintain their solar investments—even when the original technology is no longer in production.
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Blog
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Case Study
GBP Hits Milestone Installing over 230MW in Repowering Projects
GBP has replaced 300,000 solar panels across Japan. Now it's ready to replicate the success overseas. -
Insight
How to Match Replacement Solar Panels with Your Existing Inverter and Mounting System
Upgrading or replacing faulty solar panels doesn’t always mean you have to replace your entire system. -
Insight
Replacing Damaged Solar Panels After a Storm: A Step-by-Step Guide
Solar power systems are built to endure harsh weather conditions, but storms—especially those involving hail, high winds, or flying debris—can inflict damage that affects your energy production and system safety. -
Insight
A Comprehensive Troubleshooting Guide For Your Solar Panels
Solar panels are often celebrated as a low-maintenance, long-term solution for renewable energy. However, even the most robust systems can suffer performance issues over time.
About GBP

Pioneer in renewable energy
We are a comprehensive renewable energy solutions development company that provides system design and construction, component production, and O&M for renewable energy, primarily solar power generation, as well as cutting-edge solutions that utilize AI and IoT technology. Leveraging our comprehensive
technical capabilities and the reliability of a Japanese company, we contribute to the sustainable development of our customers and society, and to a smart renewable energy future.
Our Business
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Service01Renewable Energy Business
The importance of utilizing renewable energy is increasing as a common issue for all humankind in modern society. We handle everything from the design of solar and wind power generation systems to the production and procurement of materials, construction, and O&M. We also provide various comprehensive solutions for renewable energy.
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Service02Solar Cable Business
We have a full lineup of copper cables for power, DC/AC cables, and electric wires. Our strength is our ability to steadily supply safe, secure, and high-quality cables. We have also started offering aluminum cables for power to combat theft.
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Service03General Business
We solve our customers' problems in a wide range of fields, including research and development of cutting-edge solutions that utilize AI and IoT technologies, and comprehensive semiconductor-related solutions.
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