The use of renewable energy has both social and economic benefits, and the Tokyo Metropolitan Government is promoting the conversion of the city’s many apartment complexes to renewable energy. We will now provide support for the installation of substation equipment in new or existing housing complexes. We will also provide additional support for the installation of solar power generation equipment.

Business overview

Subsidies will be provided to recipients who introduce a “registered business plan (a plan to supply 100% renewable electricity through high-voltage bulk power reception)” published on the website of the Tokyo Metropolitan Center for the Promotion of Activities to Cope with Global Warming (Cool Net Tokyo), a public interest incorporated foundation run by Tokyo Metropolitan Environmental Public Corporation (External link).

Grant amount, grant requirements, etc.

When applying, the owner or management association of the apartment complex and the high-voltage bulk electricity receiving business operator must agree on the registered business plan before submitting the application.

Grant target	Subsidy unit price	Upper limit	Requirements
Substation equipment, etc.	2/3 of equipment and construction costs	8.5 million yen/building or 85,000 yen/unit	・The equipment is related to the services provided by a high-voltage bulk electricity receiving business operator registered with Cool Net Tokyo. ・The substation equipment must comply with the standards for private electrical facilities under the Electricity Business Act, etc.
Solar power generation equipment (existing)	120,000 yen/kilowatt	Power output less than 50 kilowatts	The equipment must be installed in an apartment building for which a high-voltage bulk electricity receiving contract that is eligible for subsidies is concluded, etc.
Solar power generation equipment (new construction)	100,000 yen/kilowatt
Mounting construction top-up	200,000 yen/kilowatt		Limited to installation on flat roofs of apartment buildings, etc.
Waterproofing work	180,000 yen/kilowatt		Limited to installation on flat roofs of existing apartment buildings, etc.

Grant recipients

1）Power receiving and transforming facilities, etc.

A high-voltage bulk electricity receiving business operator whose business plan has been registered with Cool Net Tokyo
*The registered business plan is a cheaper plan that takes the subsidy into account.

2）Photovoltaic power generation equipment (including mounting and waterproofing)

1）Owners and management associations of apartment complexes where the system will be introduced

Grant application period

May 22, 2025 – March 31, 2026 (ends when the total application amount reaches the upper limit)

Business plan submission period

May 22, 2025 – February 28, 2026

Application reception desk

Cool Net Tokyo (link is external)

This project is an initiative to promote the “Tokyo 2050 Strategy.”
Strategy 20: Zero-emission “Maximizing energy efficiency”

Contact: (About the subsidy system) Environment Bureau, Climate Change Department, Household Energy Policy Division Phone: 03-5388-3709 (Regarding application acceptance) Tokyo Metropolitan Environmental Public Corporation, Tokyo Metropolitan Global Warming Prevention Activities Promotion Center (Cool Net Tokyo) Phone: 03-6258-5317