Certified solar power generation system with superior functionality
The Tokyo Metropolitan Government certifies solar power generation systems (functional PV) that possess superior functionality to meet the unique conditions of urban areas, and provides additional subsidies to the residential solar power generation system subsidy program. We are pleased to announce that, from among the products that applied for certification in fiscal year 2025, functional PV systems have been certified and will be eligible for additional subsidies in the fiscal year 2026 subsidy program.
In addition, this time we have also certified new products such as “damage-resistant (glass products) and small size” and “damage-resistant (glass products) and integrated into building materials (roofs).”
In addition, the additional subsidy amount will be increased to a maximum of 100,000 yen per kilowatt.
1 Certification of a solar power generation system with superior functionality
（1）Certified products
We have certified 367 solar power generation system products that possess superior functionality.
Details of the certified products are available on Cool Net Tokyo’s business website.
| Functional classifications, etc. | FY2026 Additional amount | Certification Number of products | Extension [Note 1] | (Reference) Additional amount for FY2025 |
||
|---|---|---|---|---|---|---|
| New[Note 2] | ||||||
| Solar module | Small size | Polygons (excluding squares), building material shapes | 50,000 yen/kilowatt | 30 | 16 | 50,000 yen/kilowatt |
| 14 | ||||||
| Square | 20,000 yen/kilowatt | 49 | 27 | 20,000 yen/kilowatt | ||
| 22 | ||||||
| Integrated building material | Roof | 50,000 yen/kilowatt | 62 | 48 | 50,000 yen/kilowatt | |
| 14 | ||||||
| Other than the roof (windows, walls, etc.) | 100,000 yen/kilowatt | 2 | 2 | 80,000 yen/kilowatt | ||
| 0 | ||||||
| Lightweight type | Glass products | 10,000 yen/kilowatt | 20 | 1 | 10,000 yen/kilowatt | |
| 19 | ||||||
| Glassless products | 80,000 yen/kilowatt | 17 | 10 | 80,000 yen/kilowatt | ||
| 7 | ||||||
| Preventive type | Glass products | 20,000 yen/kilowatt | 122 | 32 | 20,000 yen/kilowatt | |
| 90 | ||||||
| Glass products and small size (polygonal (excluding squares), building material type) | 80,000 yen/kilowatt | 17 | 0 | ― | ||
| 17 | ||||||
| Glass products and small (square) | 50,000 yen/kilowatt | 21 | 0 | ― | ||
| 21 | ||||||
| Glass products and integrated building material (roof) | 80,000 yen/kilowatt | 9 | 0 | ― | ||
| 9 | ||||||
| Glassless products | 80,000 yen/kilowatt | 12 | 3 | 80,000 yen/kilowatt | ||
| 9 | ||||||
| Peripheral equipment | PV output optimization | Micro inverter | 10,000 yen/kilowatt | 4 | 2 | 20,000 yen/kilowatt |
| 2 | ||||||
| Optimizer | 10,000 yen/kilowatt | 2 | 2 | 10,000 yen/kilowatt | ||
| 0 | ||||||
| Functional classifications, etc. | FY2026 Additional Amount | Certification Number of products | Extension [Note 1] | (reference) Additional amount for FY2025 | ||
| New [Note 2] | ||||||
| Solar module | Small size | Polygons (excluding squares), building material shapes | 50,000 yen/kilowatt | 30 items | 16 items | 50,000 yen/kilowatt |
| 14 items | ||||||
| Square | 20,000 yen/kilowatt | 49 items | 27 items | 20,000 yen/kilowatt | ||
| 22 items | ||||||
| Integrated building material | Roof | 50,000 yen/kilowatt | 62 items | 48 items | 80,000 yen/kilowatt | |
| 14 items | ||||||
| Other than the roof (windows, walls, etc.) | 100,000 yen/kilowatt | 2 items | 2 items | 80,000 yen/kilowatt | ||
| 0 items | ||||||
| Lightweight type | Glassware | 10,000 yen/kilowatt | 20 items | 1 items | 10,000 yen/kilowatt | |
| 19 items | ||||||
| Glassless products | 80,000 yen/kilowatt | 17 items | 10 items | 80,000 yen/kilowatt | ||
| 7 items | ||||||
| Preventive type | Glassware | 20,000 yen/kilowatt | 122 items | 32 items | 20,000 yen/kilowatt | |
| 90 items | ||||||
| Glass products and small size (polygonal (excluding squares), building material type) | 80,000 yen/kilowatt | 17 items | 0 items | ― | ||
| 17 items | ||||||
| Glassware and small (square) | 50,000 yen/kilowatt | 21 items | 0 items | ― | ||
| 21 items | ||||||
| Glass product and integrated building material (roof) | 80,000 yen/kilowatt | 9 items | 0 items | ― | ||
| 9 items | ||||||
| Glassless products | 80,000 yen/kilowatt | 12 items | 3 items | 80,000 yen/kilowatt | ||
| 9 items | ||||||
| Peripheral equipment | PV output optimization | Micro inverter | 10,000 yen/kilowatt | 4 items | 2 items | 20,000 yen/kilowatt |
| 2 items | ||||||
| Optimizer | 10,000 yen/kilowatt | 2 items | 2 items | 10,000 yen/kilowatt | ||
| 0 items |
[Note 1] Extension: Products that were certified in fiscal year 2024 and have been certified again.
[Note 2] New: Newly certified products
（2）Business homepage
（3）Main revisions to the standards for certification in fiscal year 2025
The “Standards for Photovoltaic Power Generation Systems with Superior Functionality” for certification were revised on January 13, 2026, based on market trends, etc., and the following new categories were established to promote the widespread use of products that combine dust prevention and other functions.
- Splash-proof type (glass products) and small size (polygonal (excluding squares), building material type)
- Splash-proof (glassware) and small (rectangular)
- Rainproof type (glass product) and integrated into building materials (roof)
*These standards are published on Cool Net Tokyo’s business website.
2 Supplementary subsidies in each subsidy program
For products certified as having superior functionality as solar power generation systems, an additional subsidy of 100,000 yen, 80,000 yen, 50,000 yen, 20,000 yen, or 10,000 yen per kilowatt is planned for the residential solar power generation system subsidy program starting in fiscal year 2026. Details will be announced separately for each subsidy program.
- Tokyo Zero-Emission Housing Promotion Project
- Building Environmental Reporting System Promotion Project (Support Project for the Installation of Renewable Energy Equipment, etc. by Specified Suppliers)
- Project to expand the adoption of insulated and solar-powered homes that are resilient to disasters and contribute to health.
- Enhanced project to promote zero initial costs for residential solar power generation
- Insulation and Renewable Energy Concentration Promotion Project for Rental Housing
| Contact: (Regarding business in general) Environmental Bureau, Climate Change Countermeasures Department, Environmental City Development Division Phone: 03-5388-3440 (Regarding certification) (Public Interest Incorporated Foundation)Tokyo Metropolitan Environmental Public Corporation, Tokyo Metropolitan Center for Promoting Activities to Prevent Global Warming, Global Warming Countermeasures Promotion Division Phone: 03-6258-5315 |
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