Suzuki and Partner Companies Share Power Through On-site and Off-site PPAs

Suzuki and Partner Companies Share Power Through On-site and Off-site PPAs
November 17, 2025 

Maximizing Space for Renewable Energy Introduction

This describes a community or corporate renewable energy sharing model:

1. Maximize space utilization to introduce renewables.

2. Use the generated electricity for self-consumption.

3. Share surplus power within the community.

4. Choose and use local renewable energy sources.

5. Participating companies share renewables, maximizing solar PV installation capacity.

6. Outcome: Increase in local renewable energy.

This model emphasizes optimizing available space (like rooftops) for renewable energy installation (primarily solar). Electricity is prioritized for on-site use, with any surplus being shared among members within a community (e.g., an industrial park), rather than solely selling it all back to the grid. This approach helps maximize the proportion of clean energy used locally, reduces transmission losses, and accelerates the local energy transition.

On October 31, Suzuki announced that Koritz (Iwata City, Shizuoka Prefecture), a member of the Suzuki Cooperative Association comprising the company and its partner businesses, has implemented both on-site and off-site power purchase agreement (PPA) services as part of the Enshu Decarbonization Project led by Chubu Electric Power Miraiz.

Koritz installed solar power systems on the rooftops of its headquarters plant and its west plant in Iwata City through an on-site PPA, generating electricity that exceeds the company’s own consumption. The electricity generated is used within Koritz’s facilities, while surplus electricity produced on holidays is supplied to Suzuki’s headquarters in Hamamatsu City through an off-site PPA.

The total capacity of the solar panels is approximately 748 kW, and the total capacity of the power conditioning systems (PCS) is 500 kW. The solar panels were manufactured by Astronergy, a subsidiary of China’s Chint Group, while the PCS units were supplied by Huawei. The expected annual power generation is around 900,000 kWh, including about 700,000 kWh for Koritz and 200,000 kWh for Suzuki. Power generation began on October 15.

The Enshu Decarbonization Project utilizes both on-site and off-site PPA services provided by Chubu Electric Power Miraiz to facilitate power exchange among private companies located in the Enshu region of western Shizuoka Prefecture, which includes eight cities and towns: Kosai, Hamamatsu, Iwata, Fukuroi, Mori, Kakegawa, Kikugawa, and Omaezaki. The project aims to increase renewable energy generation throughout the Enshu area and supply it to electricity-consuming businesses.