What is Coolnet Tokyo's solar power business? We explain the application process and an overview of each business!

Updated: July 2026, 6

Project to promote the introduction of solar power generation in households (solar power)

This is a system that subsidizes a portion of the cost for those who install a Tokyo metropolitan (Cool Net Tokyo) solar power generation system in their residence in Tokyo.

This project applies to both new and existing homes.

Schedule

●Project implementation year: Until FY9 (grants will be issued until FY11)

Pre-registration:Starts May 8, 5!

Subsidy

*The above formula is the basis for calculating the subsidy amount, and there are many other additional factors.

*Expenses covered by the grant: Equipment costs (costs required for purchasing facilities and equipment, etc.) + construction costs (excluding consumption tax)

Main requirements for the target device

① The item is unused.

② It must be newly installed within a house or its premises in Tokyo.

③ The electricity generated by the installed solar power system must be used in the residential area. ④

④ It is not an addition made as part of an existing system.

⑤ The solar panels that make up the solar power generation system must be certified under either A or B.

　A. It is a JETPVm certified module.

　A. The solar cell module has been certified by a certification body that is a member of the ECEE-PV-FCS system.

⑥ The power generation output of the solar power generation system is less than 50kW.

Grant recipients

1) Individuals who own solar power generation systems

② Corporation that owns a solar power generation system

③ The management association (administrator or management association corporation) that owns the solar power generation system

④ Businesses that directly contract and lease solar power generation systems to be used in homes in Tokyo (equipment leasers and electricity retailers)

Eligible facilities

◆Electrical Safety and Environment Research Institute (JET)Among the JETPVm certifications stipulated by JETPVm, it must be module certified or equivalent or higher.

◆International Electrotechnical Commission (IEC)The solar cell module must be certified by a certification body that is a member of the IECEE-PV-FCS system (limited to products within the validity period of the certification).

◆The power generation output of the solar power generation system is less than 50kW.

　*Other conditions also apply.

Required documents for advance application

* The above documents are required for advance application.

　We will inform you of the documents required for the grant application and performance report after your advance application.

FAQ

Who can be an applicant?

Only the owner (purchaser) of the solar power generation system can be an applicant.

* (excluding leases, etc.)

Can the same applicant submit multiple applications? Is there a limit to the number of applications?

It is okay for the same applicant to submit multiple applications. There is no limit to the number of applications.

Does the applicant need to live in Tokyo?

If the installation location is within a residence or its premises in Tokyo, the applicant does not need to live in Tokyo..

Is it necessary to take out renovation defect insurance when applying for a subsidy?

Renovation defect insurance is one type of additional subsidy.

Even if you are applying for a subsidy, taking out renovation defect insurance is optional.

What do you consider to be housing?

We check whether the type column of the certificate of registered matters for the place where electricity is used is written as "residence", "apartment building", etc., indicating that it is a residence.

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