Click here to contact us by phone
Please contact us by phone.
(Free call)0120-431-444
10:00 AM - 6:00 PM (excluding New Year's holidays)
Solar panels and battery storage systems
By installing it in your home
You can significantly reduce your daily utility bills.
Furthermore, electricity can be used even during power outages and disasters.
This is a reliable service.
This service is limited to the Kanto area.
In case of emergency,
Providing peace of mind that illuminates your family's life.
Natural disasters striking the Japanese archipelago are increasing in scale year by year, posing a real sense of unease to those of us who are forced to respond to them.
With "J:COM Solar & Battery Storage," you can secure the electricity you need for daily life even if a power outage occurs due to a disaster, giving you peace of mind even in the pitch black of night or in the cold rain.
Large-scale earthquakes that have been pointed out *
Earthquakes can strike anytime, anywhere, so it's crucial to be adequately prepared to protect your life.
Large-scale power outages due to natural disasters. Earthquakes, typhoons, and other natural disasters can sometimes result in prolonged periods without electricity.
- From the Cabinet Office's "Disaster Prevention Information Page: Anticipated Large-Scale Earthquakes." The predicted probability of occurrence is from the Headquarters for Earthquake Research Promotion. (As of January 2025)
If electricity is available,
Peace of mind in case of an emergency.
During disasters, people live in anxiety and inconvenience.
You may be forced to do so.
Toilet
use
I'm worried if I can do it.
Water outages and deteriorating sanitation conditions
The refrigerator
use
I'm worried if I can do it.
Food spoils
air conditioner
I'm worried if it will work.
babies and pets
health problems
My smartphone
I'm worried about whether it will charge.
Difficult to obtain information

You can save on electricity bills.
Daily utility bills will be reduced.
By generating electricity with solar panels and storing it in a battery system, and then using that electricity wisely, we can make your electricity bill more affordable.
Depending on your household's electricity usage, you could potentially save around 3.4 million yen over 30 years.
Additional costs are required for solar panels and battery storage system equipment.
Prerequisites/Notes
Estimates based on electricity rates as of November 5, 2025. ● The amount of electricity bill reduction will vary depending on the customer's electricity usage, amount of sunlight, solar power generation, and battery storage status. ● This estimate is a reference value of electricity usage and electricity rates estimated by our company and may differ from actual electricity usage and electricity rates. ● The amount of electricity bill reduction is rounded down and may differ from the actual reduction. (Estimates are inclusive of tax) ● Separate equipment costs for solar power generation and battery storage are required. ● Fuel cost adjustments are not included. Depending on the fuel cost adjustment, the application status of discounts such as bank transfer, and usage, it may not be cost-effective. ● Electricity bills after installation include revenue from selling surplus electricity. [Calculation conditions] The basic calculation formula used is: Electricity bill (monthly) = Basic charge + Usage charge. The electricity bill is calculated based on the values listed in Tokyo Electric Power Company Energy Partner's terms and conditions, assuming a monthly electricity usage of 481kWh (based on our survey results as of January 2017, which shows an average monthly electricity usage of 481kWh for a four-person household) and a contracted power of 6kW. ●Electricity usage: 481kWh ●Electricity plan: Tokyo Electric Power Company Energy Partner Night Discount 8 ●Solar power generation equipment: 4kW ●Self-consumption ratio of solar power generation: 60% ●Battery storage capacity: 12.7kWh ●Renewable energy surcharge: 3.98 yen/kWh ●Surplus electricity purchase price: Years 1-10: 15 yen/kWh (FIT system for the first half of 2025) Years 11-30: 8.5 yen/kWh (TEPCO EP Renewable Energy Purchase Standard Plan)

Because there are no initial costs *1,
It's easy to get started
With leasing, solar panels, battery storage systems, and installation costs are all zero upfront. *1
You can start without any financial strain by making a fixed monthly payment.
- Monthly lease fee
- Monthly price including equipment costs and installation costs
- Lease period
- 10years or 15years
Free transfer
- You can choose a lease term of 10 or 15 years. The lease is based on a 10-year or 15-year commitment; early termination will incur a cancellation fee. Monthly lease fees are calculated based on various factors including system capacity, location, and your home's conditions. Please refer to the lease agreement details for further information.
- Upon expiration of the lease term, the equipment will be transferred to the customer by the partner leasing company in its current condition. After the transfer, J:COM will not be liable to the customer for any deterioration, performance degradation, or malfunctions of the equipment due to aging.
For those who want to prepare for disasters and power outages
For those aiming for energy self-sufficiency
Monthly fee of 26,401 yen (tax included) *2
Storage battery capacity 12.7kWh
People who use a lot of electricity at home during the day
People who have pets and frequently use heating and cooling.
Monthly fee of 11,492 yen (tax included) *2
For those whose FIT period has expired
For those who have already installed solar panels and want to make effective use of the electricity they generate.
Monthly fee of 12,550 yen (tax included) *2
Storage battery capacity 6.3kWh
Depending on the manufacturer you choose, leasing may not be available.
Please inquire about the pricing for lump-sum and installment payments.
Compare outright purchase and leasing services.
Furthermore, you may be eligible for subsidies from your local government!
For more information, please check your local government's website or contact our customer service center.

With extensive support
My first solar panel
Even with a battery storage system, you can rest assured.
15 years
Equipment Warranty
Responding to equipment failures
※425 years
Output Guarantee
Solar panels
The amount of power generated is as expected.
Guaranteed if it falls below
15 years
Comprehensive property insurance included.
During natural disasters, etc.
Responding to accidental incidents
10 years
Construction Warranty
Leaky roof in your home
Supports, etc.
We also offer free support for applying for subsidies to help reduce implementation costs, so please feel free to contact us.
From before service implementation until after the contract period ends, you can consult us about a variety of issues through our dedicated hotline. Our support doesn't end with installation J:COM provides a customer-focused support system that continues to support your life afterward.
For inquiries, please call: 0120-431-444
(10:00 AM - 6:00 PM *Excluding New Year's holidays)

Peace of mind even during power outages and disasters
Even on a night when something unexpected happens,
The light won't go out.
Even if the power is cut off due to a blackout or disaster, the electricity stored in the battery will protect your home and family.
Image of home appliances that can be used during a power outage
The following home appliances can be used for approximately 34 hours.
Battery capacity 12.7kWh/outdoor installation
| refrigerator | 50W to 100W |
|---|---|
| illumination | 50W to 100W |
| TV | 100W-180W |
| Charging my smartphone | 10W |
Power consumption 285W, with the battery unit in its initial state and fully charged. Since the power consumption of each appliance varies, this does not guarantee operating time or simultaneous use of appliances.

A lineup of top manufacturers
Because J:COM handles multiple devices from carefully selected, high-quality manufacturers,
We can offer proposals tailored to your needs.
Made in Japan.
Choshu Sangyo, a leading domestic manufacturer of residential solar panels and battery storage systems.
A domestic manufacturer with 25 years of experience in the solar power industry.
Exsol. As a comprehensive solar power generation company, we provide highly safe, high-performance, and low-cost solar panels and battery storage systems.
Cumulative construction record Over 30,000 items of
The construction company will carry out the work carefully.
You can rest assured about the quality of our workmanship.
- Track record of our partner construction companies as of November 5, 2025.
- This list includes manufacturers we handle as of November 5, 2025. Please note that we may not be able to offer all manufacturers and equipment depending on your area, home conditions, contract terms, and payment method.
Click here to contact us by phone
Please contact us by phone.
(Free call)0120-431-444
10:00 AM - 6:00 PM (excluding New Year's holidays)
Application flow
If you'd like to know more or would like a quote, please feel free to contact us.
inquiry
Service Explanation
Estimate/Proposal *1
Contract and site survey *2
Installation work/
Start using
- To provide you with a detailed estimate, our representative will need to review your home's floor plan beforehand. If you do not have a floor plan, we may need to inspect it on-site. Our representative will always visit you with the simulation results and estimate to explain everything to you.
- The on-site inspection will take approximately one hour. When we inspect the roof and attic, we may also need to inspect the bathroom and changing room.
Before November 4, 2025
If you have subscribed to J:COM Solar (PPA), please click here.
Frequently Asked Questions
Are there any requirements for installing solar panels and battery storage systems?
Solar panels: Installation is not possible if your home has a flat roof. Also, if your home is close to the sea, installation may not be possible due to concerns about salt damage.
Battery storage systems: Installation may not be possible if a delivery route to your home cannot be secured. Additionally, installation may not be possible depending on the structure and equipment environment of your home.
Please be aware of this in advance.

Can solar panels be installed on a north-facing roof?
Because we cannot expect sufficient power generation and need to consider light pollution from reflected light, we would like to confirm details about your home's situation.
Are there any restrictions on which electricity company I can contract with?
There are no restrictions. It can be used with any electricity provider.
Are there any documents required for application or quotation?
- Photo ID (driver's license, My Number Card, residence card)
- Please provide a floor plan of your residence (if you do not have one, we will need to inspect it on-site).
- Documents showing your mortgage loan status * (e.g., loan agreement, loan approval notification, balance certificate)
For those installing leased equipment in a newly built home within the last year of residence, or for those entering into a lease agreement.
Do I need to subscribe to JCOM services such as JCOM Electricity?
It is not required. You can also use only the solar panels and battery storage system.
Please tell me about your service area.
The service area covers the JCOM service areas in Tokyo, Saitama, Chiba, Kanagawa, Ibaraki, and Gunma prefectures. (As of November 2025)
Is it possible to purchase it instead of leasing it?
In addition to leasing, we also offer cash transfer (lump sum) and loan payment options.
Further details will be provided by our representative.
The coverage and fees may vary depending on the payment method you choose.
How long will it take before I can use the equipment?
Equipment installation will be scheduled approximately 2-3 months after the contract is signed. Please note that due to the various application procedures required with the Ministry of Economy, Trade and Industry and the power company, it may take several more months before service can begin.
Who should I contact in case of a power outage or other problems?
Our dedicated hotline → 0120-431-444 [10:00 AM - 6:00 PM, open all year round] *Excluding New Year's holidays.
If your caller ID is set to be hidden, please dial "186" before 0120.
Alternatively, please call the phone number provided at the time of your contract.
Where are the authorized dealers for J:COM solar and battery storage systems?
The authorized distributors as of November 25, 2025 are as follows:
- ELJ Solar Corporation
0120-026-047
10:00 AM - 6:00 PM (excluding Mondays and Tuesdays) - Shin Nippon Jusetsu Co., Ltd.
0120-557-455
10:00 AM - 6:00 PM (Weekdays, Saturdays, Sundays, and public holidays)
About lease agreements
Please tell me about "J:COM Solar and Battery Storage (Lease)".
This service is offered as a lease agreement (subject to credit check) and is available to individual customers residing in detached houses.
(Depending on the review results, you may not be able to use the service.)
During the contract period, the leasing company* retains ownership of the equipment. After the lease period expires, the equipment will be transferred to the customer free of charge.
The partner company for the lease agreement will be TEPCO Fintech Co., Ltd.
Are there any application requirements?
The following conditions will disqualify you from applying.
- Persons under the age of 18
- Those who are not the owner of the location where the leased equipment will be installed (your home)
- Foreign residents without permanent residency
- When using leased equipment for purposes other than home use (e.g., mixed-use residential/commercial properties, investment properties, etc.)
Additionally, a co-signer will be required in the following cases:
- If you are over 75 years old at the end of the lease term
- If you have a co-signer on your mortgage
- If there are joint owners of the house
- If the leasing company determines that a joint guarantor is required
Please tell me about the lease contract period.
The standard lease term is 15 years. We can also shorten it to 10 years upon request. (Monthly fees will vary depending on the contract term.)
Please tell me about payment.
A fixed monthly lease fee will be paid to the leasing company (TEPCO Fintech Co., Ltd.).
Lease payments will be made via bank transfer.
The first payment will be debited from the contract holder's bank account on the 27th of the month following the lease commencement date, and thereafter on the 27th of each month.
Can I cancel the contract midway through?
Early termination of the lease is generally not permitted. If you are forced to terminate the lease, you will be required to pay the total amount of the remaining lease payments (plus consumption tax) in a lump sum as a termination penalty.
[About the amount including tax]
- The listed amounts include tax unless otherwise specified.
- Consumption tax differences may occur due to changes in the consumption tax rounding method under the invoice system.
