For solar panel and battery installation in
Tama-ku, Kawasaki,
Kakeru Koumuten is at your service!
Kakeru Koumuten is a specialized exterior renovation company based in Kanagawa Prefecture.
We have handled numerous exterior renovations in Tama-ku, Kawasaki,
and you can also trust us with the installation of solar panels and batteries!
Here, we would like to introduce“Why Kakeru Koumuten is chosen for solar panel installations”.
“How to Choose a Solar Panel Contractor in Tama-ku”
“Costs for Solar Panel and Battery Installation”
“Subsidies Available for Solar System Installation in Tama-ku”
We will also explain the above three points!
The installation of solar panels can sometimes lead to issues such as“water leaks”,
which poses certain risks.
To ensure a satisfactory solar panel installation, it isessential to obtain estimates from at least three companies!
For customers considering solar panel installation in Tama-ku, Kawasaki,
this information will definitely be helpful, so please take a look!
目次
- 1 Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installations in Tama-ku, Kawasaki
- 1.1 1. We also handle exterior renovations other than solar panel installations!
- 1.2 2.Facilities specialized in exterior renovations
- 1.3 3.Complete In-House Construction
- 1.4 4. Various Permits Obtained & Skilled Workers on Staff
- 1.5 5. Warranty and Aftercare
- 1.6 6. Flexible and Prompt Response
- 1.7 7. Human Resource Development
- 2 Possible subsidies and grants available inTama-ku, Kawasaki City, Kanagawa Prefecture
- 2.1 National subsidy “Support Project for the Introduction of Storage Battery Systems in Homes”
- 2.2 Kanagawa Prefecture “Subsidy for Solar Power Generation Equipment and Home Storage Battery Installation for Existing Houses”
- 2.3 Kanagawa Prefecture “Subsidy for Self-Consumption Type Solar Power Generation Equipment”
- 2.4 Kawasaki City Solar Power Generation Equipment Installation Subsidy (Fiscal Year 7)
- 3 Solar Panel Installation & Battery Installation Price List
- 4 Self-Estimate and Profit Simulation for Solar Power Generation
- 5 Customer Testimonials
- 6 Examples of Solar Panel Installation
- 7 How to Choose a Solar Panel Installation Contractor in Tama-ku, Kawasaki
- 8 Benefits of Introducing Solar Power Equipment
- 9 What are the points to be aware of when introducing solar power generation?
- 10 How to Choose Solar Panels?
- 11 If you are looking for a solar panel installation contractor in Tama-ku, Kawasaki, please consult Kakeru Koumuten Co., Ltd.
- 12 Features of Tama-ku, Kawasaki
Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installations in Tama-ku, Kawasaki
The reasons why our company is entrusted with solar panel installations by customers in Tama-ku, Kawasaki
are due to our“strengths in solar panel installation that cannot be imitated by other companies”
, which have received high praise from many customers.
so we would appreciate it if you could compare our estimates with those of other companies.
We are confident, so we welcome estimates from any number of companies!
1. We also handle exterior renovations other than solar panel installations!
Most troubles such as leaks caused by solar panel installations are due to the lack of knowledge of the solar panel installation contractors.
While contractors specializing in solar panel installations have knowledge about the panels themselves, many lack expertise regarding the roof and waterproofing at the installation site, which is a reality.
It is reassuring to have someone knowledgeable about roofs to avoid maintenance issues and troubles after installation!
Kakeru Koumuten Co., Ltd. is strong in roofing work and can also detach and attach solar panels in-house, allowing us to respond quickly to maintenance and urgent issues after solar panel installation!
2.Facilities specialized in exterior renovations
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide low-cost, high-quality solar and exterior renovation services.
We have established 5 bases centered around Yokohama City, Kanagawa Prefecture for our material storage and showroom.
In-house scaffolding materials
We own the scaffolding materials necessary for the installation of solar panels and can assemble the scaffolding ourselves.
By performing the scaffolding work with our own scaffolding team instead of outsourcing, we can also cut costs related to scaffolding work.
We have scaffolding materials for approximately 50 single-family homes!
Storage of materials in our large in-house warehouse
We store roofing materials and paints, and we can also store removed solar panels.
By ordering a large quantity of materials at once, we can purchase materials at a lower cost!
Additionally, we always have a stock of roofing materials, allowing us to respond quickly in emergencies!
In-house sorting and transportation of waste materials
The installation of solar panels often involves roofing work, generating various types of waste materials such as paint, wood, and metal.
Most contractors dispose of these materials all at once, but by sorting and recycling the waste, significant cost savings on waste disposal can be achieved.
Exterior Renovation Dedicated Showroom
In our showroom, not only can you have meetings, but you can also
check the actual foundation brackets for solar panels and see how they are installed on the roofing materials!
We can also provide simulations for the potential earnings and installation costs when introducing solar panels!
Since roofing and exterior wall work often accompany each other, we also have samples of roofing materials and models that illustrate the structure, allowing us to provide detailed explanations!
3.Complete In-House Construction
One of Kakeru Koumuten’s major strengths is our complete in-house construction.
From inquiry to project completion, everything is handled by Kakeru Koumuten Co., Ltd. This allows us to keep costs down while providing high-quality roof renovations.
Additionally, one representative will assist you from the estimate to the completion of the work.
Since the same person will handle sales and construction management, smooth communication is possible.
We can provide consistent in-house construction from temporary scaffolding installation to exterior wall painting and roof renovations!
4. Various Permits Obtained & Skilled Workers on Staff
We have obtained construction industry permits and permits for industrial waste collection and transportation!
We also have nationally certified sheet metal workers and painting specialists on staff, giving us confidence in our construction techniques.
We are capable of handling large-scale roofing projects such as those for factories!
5. Warranty and Aftercare
In addition to the manufacturer’s warranty for solar panel installation, we also provide our own rain leak warranty!
Aftercare is available annually, and we send out notification DM each year.
If you have any questions about the warranty, please click on the image above!
6. Flexible and Prompt Response
Our company is equipped to handle various roofing troubles and situations.
Even if you cannot access the roof at high altitudes, we can respond using a drone!
During rain leak investigations, we can also conduct inspections using a thermal imaging camera.
If the power generation of the solar panels decreases due to dirt, we can also provide cleaning with a specialized brush.
We will respond according to your preferences.
7. Human Resource Development
To enhance our skills, we create various roof models and conduct practical training.
Since the construction methods vary depending on the shape and slope of the roof, we regularly provide technical training to ensure that all staff can handle various scenarios.
Possible subsidies and grants available inTama-ku, Kawasaki City, Kanagawa Prefecture
National subsidy “Support Project for the Introduction of Storage Battery Systems in Homes”
The government is implementing the “Support Project for the Introduction of Storage Battery Systems in Homes” to assist with the installation of storage batteries.
This subsidy provides 30,000 yen per kWh (with a maximum limit of 600,000 yen) for those who install residential storage batteries that meet certain conditions.
Additionally, this program is part of the government’s efforts to promote zero carbon emissions and renewable energy, allowing for further advancement of “self-consumption” of electricity when used in conjunction with solar power generation.
For detailed eligibility requirements and application procedures, please check the official website.
👉 Click here for the official site
Kanagawa Prefecture “Subsidy for Solar Power Generation Equipment and Home Storage Battery Installation for Existing Houses”
In Kanagawa Prefecture, subsidies are provided for those who install “solar panels” or “home storage batteries” in existing houses.
The subsidy amount is a flat 40,000 yen for solar power generation equipment only, up to 100,000 yen for storage batteries depending on capacity, and a total of up to 300,000 yen when both are installed simultaneously.
This program is part of efforts to combat global warming and aims to promote the use of renewable energy.
For detailed conditions and application methods, please check the official page of Kanagawa Prefecture.
👉 Click here for details
Kanagawa Prefecture “Subsidy for Self-Consumption Type Solar Power Generation Equipment”
In Kanagawa Prefecture, subsidies are provided for the installation of “self-consumption type” systems that use electricity generated by solar panels at home.
Eligible applicants are those who install solar power generation equipment in existing or newly built houses within the prefecture.
The condition is that at least 30% of the generated electricity must be consumed at home (installation of storage batteries is also acceptable).
The subsidy amount is 10,000 yen per kW, with a maximum limit of 4 kW (maximum 40,000 yen).
For example, if you install a 3 kW solar panel, you can receive a subsidy of 30,000 yen.
This program aims to promote the use of renewable energy and achieve Kanagawa Prefecture’s “Zero Carbon Society”.
For more details, please check the official page of Kanagawa Prefecture.
👉 Click here for details
Kawasaki City Solar Power Generation Equipment Installation Subsidy (Fiscal Year 7)
■ Eligible Equipment and Amounts
-
Solar Power Generation Equipment
30,000 yen per kW -
Stationary Lithium-ion Storage Battery
20,000 yen per 1kWh -
V2H Charging and Discharging Equipment
Flat rate of 100,000 yen
■ Procedure Flow
-
Online Application
・Submit necessary information online, such as the “Application for Grant” (paper applications are not accepted) -
Submission of Completion Notification
・Within 30 days of completion of work, or by the earliest date of February 13, 2026 (Friday) -
Submission of Invoice (by mail in paper form)
・Submit an invoice with the applicant’s seal by March 6, 2026 (Friday)
■ Application Schedule
-
Application Acceptance Period：April 14, 2025 (Monday) – December 26, 2025 (Friday)
-
Deadline for Submission of Completion Notification：February 13, 2026 (Friday) or within 30 days of completion of work
-
Deadline for Invoice Submission：March 6, 2026 (Friday)
■ Main Application Conditions and Required Documents
-
No delinquency in city or prefectural taxes
-
Main documents required for online application:
-
Application form
-
Consent form (if the homeowner and applicant are different)
-
Tax payment certificate or tax exemption certificate
-
Current condition photos before installation
-
A copy of the contract stating the model number and capacity of the equipment
-
Related documents if there are plans to apply for other subsidies
-
Solar Panel Installation & Battery Installation Price List
Self-Estimate and Profit Simulation for Solar Power Generation
With the simulator above,
you can obtain a rough estimate and a profit simulation for up to 30 years!
If you know the total installation capacity of solar panels on the roof and the capacity of the storage battery, you can get a rough estimate and profit simulation!
Customer Testimonials
カテゴリ ‘voice’ は見つかりません
Examples of Solar Panel Installation
| Construction Details |
| Solar Panel Installation Battery Installation |
| Existing Roofing Material |
| Horizontal Metal Roof (Super Galtect) |
| Installation Capacity |
| Solar Panels: 4.3KW Battery: 5KW class |
| Base Mounting Hardware Used |
| Niigata Manufacturing / Aluminum Catch Type Hardware |
| Price Range |
| 2.2 million yen to 2.3 million yen *Due to subsidies being provided, the actual burden amount is approximately 1 million yen Estimated time for cost recovery: Approximately 8 to 9 years (self-consumption) |
| Construction Period |
| Approximately 3 days |
| Completion Month |
| April 2025 |
| Inquiry Details |
| I am considering the introduction of solar panels and storage batteries. I heard that subsidies are available, and I would like to know how much subsidy I can receive. |
Our Proposal
We visited to provide an estimate and created a layout diagram for the solar panels based on the drawings!
The layout diagram shows the arrangement of solar panels on the roof.
Since we can also determine the installation capacity, it allows for power generation simulations and financial simulations.
We have also determined the expected amount of subsidies, which we explained to the customer along with the estimate!
How to Choose a Solar Panel Installation Contractor in Tama-ku, Kawasaki
There are many solar panel installation contractors available in Tama-ku, Kawasaki, and you may be unsure which one to choose.
Therefore,when requesting solar panel installation or storage battery installation work, be sure to check the following 4 points.
● Have extensive knowledge not only about solar panels but also about roofs
● Confirm the availability of warranties and after-sales maintenance
● Obtain estimates from multiple contractors (at least 3 companies)
● Confirm whether they provide support for subsidy applications
By confirming the above 4 points, you will be able to choose a reliable contractor.
Knowledge of roofing in addition to solar panels
Many causes of poor installation of solar panels stem from a lack of knowledge on the part of the contractor.
While knowledge about solar panels is certainly important, understanding the roof and waterproofing at the installation site is also crucial.
⚠︎Examples of troubles due to contractor’s lack of knowledge
・Solar panels installed on a deteriorated roof leading to leaks,
・Solar panels installed on a roof with a short lifespan, requiring a renovation to detach and reattach the panels within a few years,
・Misjudging the type of waterproofing and performing incorrect treatment, resulting in leaks,
and more.
When installing solar panels, understanding the condition and type of the existing roof allows you to avoid unnecessary expenses and unforeseen troubles.
Check for warranties and after-sales maintenance
When choosing a solar installation contractor, check for the presence of warranties.
While solar panels and storage batteries come with manufacturer warranties, also confirm whether there is a construction warranty in case leaks occur after installation!
If the contractor has a warranty period, they will respond free of charge in case of leaks after installation.
Additionally, some contractors offer after-sales services separate from warranties, so make sure to check if the contractor you are considering has after-sales service.
Since abnormalities or damage on the roof may be in hidden areas, you might not notice them yourself.
By conducting inspections during after-sales maintenance, you can detect abnormalities early and prevent major repairs or breakdowns!
Kakeru Koumuten Co., Ltd. provides a leak warranty as part of the construction warranty for solar panel installations.
We also conduct after-sales maintenance and send out annual DM!
Please check the DM, and if you wish, we will visit for after-sales maintenance!
Obtain estimates from multiple contractors (at least 3 companies)
When requesting solar panel installation, obtain estimates from multiple contractors.
Even for the same manufacturer and the same construction content, costs and warranties or after-sales services may vary.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your preferred repair contractor at a lower price, it is essential to obtain estimates from multiple contractors.
When comparing estimates, please check carefully:
“Check the items in the estimate”
“Types of solar panels”
“Warranties and after-sales service”
Make sure to compare these details closely! If the quality of the materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
Check if they provide support for subsidy applications
Subsidies are often available for the installation of solar panels and storage batteries, but there is a possibility that they may not be granted due to application errors.
If you proceed with the support of the contractor, there should be no issues with the application.
Make sure to apply for the subsidy before starting the construction and proceed with the work only after it has been accepted!
After the construction, the flow will be that the subsidy will be decided and granted!
Benefits of Introducing Solar Power Equipment
The benefits of installing solar panels are summarized in the five points below!
Benefit 1: Economic Advantage
The biggest advantage of installing solar panels is the economic benefit!
Although the selling price of electricity has decreased compared to ten years ago, rising electricity costs allow you to benefit from consuming the electricity you generate!
Electricity prices are expected to continue rising, making it attractive to cover your consumption with solar power!
If you plan to use the generated electricity at night, installing a storage battery is essential!
Benefit 2: Subsidies can be utilized!
The conditions and amounts of subsidies vary by prefecture and municipality, but there is a high probability that you can apply for subsidies!
Reducing the actual burden amount through subsidies is a significant advantage!
Benefit 3: Environmentally Friendly!
Solar power generation contributes to the reduction of carbon dioxide emissions and decreases reliance on fossil fuels, helping to mitigate global warming.
Since there is no noise or harmful substance emissions during the power generation process, it is considered an environmentally friendly method of generating electricity.
Benefit 4 Improved Insulation Effect!!
By installing it on the roof or rooftop, insulation properties are enhanced.
Especially in summer, it can effectively block direct sunlight, providing significant heat insulation benefits!
Benefit 5 Electricity can be used even during power outages!!
By installing a storage battery, it becomes possible to use electricity even during emergencies such as power outages!
What are the points to be aware of when introducing solar power generation?
Next, we will explain the “three points to be cautious about” when installing solar panels!
Point 1: Maintenance costs may be incurred
The maintenance costs are related more to the roof where the solar panels are installed rather than the solar panels themselves.
If you perform a roof renovation 10 to 20 years later, there will be costs associated with removing and reattaching the solar panels.
If the existing roof is deteriorating, it is reassuring to renovate it with durable roofing materials before installing the solar panels!
It would be comforting to request a simulation considering maintenance costs before introducing solar panels!
Point 2: The risk of leaks may increase depending on the roofing material
Slate roofs and tile roofs require holes to be made in the roof to secure solar panels.
As a result, there is an inevitable risk of leaks due to the holes.
Of course, we will ensure proper waterproofing, but if you are concerned about making holes, one option is to replace the roofing material with a metal roof and secure the solar panels using the catch method.
Dedicated Catch Base Hardware for Horizontal Metal Roofs
Note 3: The Roof Will Become Heavier
With the installation of solar panels, the roof will become heavier. In the case of tile roofs, it may be reassuring to replace them with lighter roofing materials.
How to Choose Solar Panels?
There are many manufacturers of solar panels, and their output (power generation) and costs vary.
It is not accurate to say that “this manufacturer has the best solar panels”; what is important is to choose solar panels that are suitable for your life plan and building!
Here are some points to consider when comparing solar panels!
Choosing Method 1: Compare Based on Total Power Generation of the Roof
When installing solar panels on the roof, it is important to consider how much power can be generated in the limited area, and the more power generated, the better!
Solar panels come in various sizes depending on the manufacturer, and their power generation also differs.
For example, a 350W panel and a 400W panel may seem that the higher output panel is better at first glance.
However, if the size of the panels does not fit well with the roof, it may be the case that “20 panels of 350W can be installed” while “only 15 panels of 400W can be installed,” leading to different installation capacities on the same roof due to the size difference.
400W × 15 panels = 6kW (total power generation of the roof)
350W × 20 panels = 7kW (total power generation of the roof)
As shown above, even if the output of a single panel is lower, the total output of the roof may be higher!
It is important to consider the total output of the roof rather than just the output of a single panel!
Choosing Method 2: Compare Based on Degradation Rate of Solar Panels
Solar panels have a degradation rate, and their power generation gradually decreases over 10 years and 20 years.
After 30 years, some may experience a 40% decrease in power generation, while others may only decrease by about 10%.
By considering the degradation rate along with the initial power generation, you can choose solar panels without regrets!
Choosing Method 3: Compare Based on Warranty Period
There are several types of warranties for solar panels, including “output warranty,” “natural disaster warranty,” and “system warranty,” and the warranty periods vary by manufacturer.
Regarding output warranties, some manufacturers offer a 30-year warranty while others provide a 10-year warranty, so it varies widely!
The longer the warranty, the better, so let’s check the warranties of the manufacturers you are considering!
If you are looking for a solar panel installation contractor in Tama-ku, Kawasaki, please consult Kakeru Koumuten Co., Ltd.
Our company handles many exterior renovations, including solar panel installations, roof work, and exterior wall work in Tama-ku, Kawasaki.
We receive requests from many customers, including renovation companies and real estate agencies, who have contacted us!
Kakeru Koumuten Co., Ltd. promises “high-quality renovations at low cost”, and we have received great feedback from numerous customers.
We continue to update our construction performance records every year, and we will strive to improve quality so that even more customers will be satisfied in the future.
Our company is capable of all exterior renovations, not only roof overlay work and re-roofing but also partial roof repairs, exterior wall painting, and exterior wall overlay methods.
We are also happy to assist with small jobs such as partial repairs and rain gutter cleaning!
In urgent cases such as leak repairs, we may also be able to provide emergency measures without scaffolding, so please consult us!
“I want to know about recommended solar panels,” “I want to keep costs as low as possible,” “I just want an estimate for now“, we will provide optimal solutions for your specific requests.
We will never propose unnecessary work focused on profit!
We always stand in the customer’s shoes and propose the best construction plans!
We are confident that we will not be outdone by other companies in terms of cost, quality, and planning for exterior work!
We welcome competitive estimates with confidence!
Estimates are completely free, and if you find our company lacking compared to others, feel free to decline!
Features of Tama-ku, Kawasaki
Tama-ku, Kawasaki, is located in the northwestern part of the city and is a green area that stretches along the Tama River, with a population of about 210,000. Geographically, it is characterized by the Tama River basin, which retains much of its natural environment, while residential areas and university campuses are scattered throughout, blending living and learning spaces. Additionally, it borders Tokyo across the Tama River, and within the ward, there are residential neighborhoods as well as many spots to enjoy nature, such as parks and walking paths.
In terms of access, the JR Nambu Line, Odakyu Line, and Keio Line run through the area, making it convenient to travel to major cities such as Shinjuku, Shibuya, and Yokohama. Moreover, crossing the Tama River allows for quick access to Tokyo, making it a highly convenient area for commuting and attending school. Furthermore, Tama-ku has well-developed bus routes, ensuring smooth travel to nearby major stations and commercial facilities.
The charm of Aoba-ku lies in its natural environment and livability. Along the Tamagawa River, you can enjoy jogging and cycling, and there are vast natural parks such as Ikuta Ryokuchi and the Japan Open-Air Folk House Museum, where you can experience the changing scenery of the four seasons. Additionally, the residential areas are highly popular among families. Furthermore, there are several universities within the district, making it a vibrant area filled with student life. Local events and community activities are also active, allowing residents to enjoy a lifestyle deeply rooted in the community.
In this way, Aoba-ku is a popular area known for its nature and convenience, making it an attractive place to live for a wide range of generations.
Our company handles exterior construction and solar panel installation extensively in Kawasaki City, Aoba-ku.
We are happy to assist with partial roof repairs such as roof overlay work, roof replacement, and leak repairs, as well as other repairs! Please feel free to consult us about any sudden troubles!
Service Areas in Kawasaki City, Aoba-ku
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Kawasaki City, Aoba-ku
Aoba-ku Ikuta / Aoba-ku Kuritani / Aoba-ku Shukugawara / Aoba-ku Suga / Aoba-ku Suga Inadazutsumi / Aoba-ku Suga Kitaura / Aoba-ku Suga Shiroshita / Aoba-ku Suga Sengoku / Aoba-ku Suga Notoro / Aoba-ku Suga Baba / Aoba-ku Seki / Aoba-ku Teraodai / Aoba-ku Nakanojima / Aoba-ku Nagao / Aoba-ku Nagasawa / Aoba-ku Nishi Ikuta / Aoba-ku Noborito / Aoba-ku Noborito Shinmachi / Aoba-ku Higashi Ikuta / Aoba-ku Higashi Mita / Aoba-ku Fuda / Aoba-ku Masugata / Aoba-ku Mita / Aoba-ku Minami Ikuta
・Leave your exterior renovations in Aoba-ku, Kawasaki to Kakeru Koumuten Co., Ltd.!
・Trust Kakeru Koumuten Co., Ltd. for your roof renovations in Aoba-ku, Kawasaki!
・Count on Kakeru Koumuten Co., Ltd. for exterior wall painting in Aoba-ku, Kawasaki!
・Kakeru Koumuten Co., Ltd. Project Achievements
・Kakeru Koumuten Co., Ltd. Aftercare Services
・Kakeru Koumuten Co., Ltd. Construction Menu & Price List
・Kakeru Koumuten Co., Ltd. Staff Blog & Announcements
・Explaining the Importance of Comparing Estimates!
・Top 12 Solar Power Manufacturers! Features and Selection Tips!
・What are the installation costs for solar power? Comprehensive tips to reduce costs!
・Where is the best place to install solar power? Key points for site selection!
・Check out our solar power system estimates here!
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AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!
