The Tokyo Metropolitan Government provides financial support for expenses related to the installation of power receiving and transforming equipment for high-voltage bulk power supply, as well as solar power generation systems, in order to promote the installation of solar power generation facilities and the adoption of 100% renewable electricity in apartment buildings within the metropolitan area.
We are pleased to announce that we are now accepting grant applications and project proposals for the Program to Promote the Adoption of Renewable Electricity in Apartment Buildings.

1. Grant Amount, Eligibility Requirements, etc.

Grants will be awarded to eligible applicants who implement the “Registered Business Plan (Plan for the Supply of 100% Renewable Energy via High-Voltage Bulk Power Supply)” published on the website of the Tokyo Metropolitan Environment Public Corporation, Tokyo Metropolitan Center for the Promotion of Global Warming Prevention Activities (Cool Net Tokyo) (link to external site).
*Please note that applications must be submitted only after the owners or management associations of multi-unit residential buildings and the high-voltage bulk power supplier have agreed to the Registered Business Plan.

Eligibility for Grants	Grant Amount	Upper limit	Requirements
Power receiving and transforming equipment, etc.	Two-thirds of the equipment and installation costs	8.5 million yen per building or 85,000 yen per unit, whichever is lower	・The equipment must be related to services provided by a high-voltage bulk power supply operator registered with Cool Net Tokyo. ・The power receiving and transforming equipment must comply with the standards for private electrical installations under the Electricity Business Act, etc.
Existing Solar Power Generation System	120,000 yen per kilowatt	Generating capacity of less than 50 kilowatts	Equipment installed in apartment buildings that have entered into a high-voltage bulk power supply contract eligible for subsidies, etc.
Solar Power System (New Construction)	100,000 yen per kilowatt
Additional costs for mounting structure construction	200,000 yen per kilowatt		Limited to installation on flat roofs of apartment buildings, etc.
Waterproofing Work	180,000 yen per kilowatt		Limited to installation on flat roofs of existing apartment buildings, etc.

2. Eligible Recipients

(1) Power receiving and transforming equipment, etc.

Business plans have been registered with Cool Net Tokyo for high-voltage bulk power suppliers.
*The registered business plans offer more competitive rates that take subsidies into account.

(2) Solar power generation facilities (including mounting structure installation and waterproofing work)

Owners and homeowners’ associations of apartment complexes implementing (1)

3. Grant Application Period

May 29, 2026 – March 31 , 2027
*The program will end once the total amount of applications reaches the maximum limit.

4. Business Plan Submission Period

May 29, 2026 – February 26, 2027

5. Grant Application Desk

Cool Net Tokyo Renewable Energy Support Team, Apartment Building Section
Project to promote the introduction of renewable energy in apartment buildings
Website for the project to promote the introduction of renewable energy electricity in apartment buildings (link to external site)

This project is an initiative to promote the “Tokyo 2050 Strategy.”
Strategy 20: Zero Emissions—”Maximizing Energy Efficiency”

Contact: (Regarding the Grant Program) Climate Change Countermeasures Division, Household Energy Measures Section, Bureau of the Environment Phone: 03-5388-3709 (Regarding Application Submission) Tokyo Metropolitan Environmental Public Corporation, Tokyo Center for the Promotion of Global Warming Prevention Activities (Cool Net Tokyo) Phone: 03-6258-5317