Leave Your Solar Panel Installation Work in Nakahara-ku, Kawasaki to Kakeru Koumuten Co., Ltd.!

For solar panel and battery installation in
Nakahara-ku, Kawasaki,
Kakeru Koumuten is your trusted choice!

Kakeru Koumuten is a company specializing in exterior renovations based in Kanagawa Prefecture.
We have handled numerous exterior renovations in Nakahara-ku, Kawasaki,
and we are also entrusted with the installation of solar panels and batteries!
Here, we would like to introduce “Reasons why Kakeru Koumuten is chosen for solar panel installations”.

“How to Choose a Solar Panel Contractor in Nakahara-ku”
“Costs for Solar Panel and Battery Installation”
“Subsidies Available for Solar System Installation in Nakahara-ku”
We will also explain the above three points!

The installation of solar panels carries risks such as “the occurrence of leaks”,
which can lead to troubles.
To ensure a satisfactory solar panel installation, it is essential to obtain estimates from at least three companies!

For customers considering the introduction of solar panels in Nakahara-ku, Kawasaki,
this information will definitely be helpful, so please take a look!

Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installations in Nakahara-ku, Kawasaki

One reason why our company is entrusted with solar panel installations by customers in Nakahara-ku, Kawasaki is
that “Kakeru Koumuten is located in Yokohama”,
but we also have “strengths in solar panel installation that other companies cannot replicate”
, which has received high praise from many customers.

Because we are confident, we welcome estimates from any number of companies!

1. We also handle exterior renovations other than solar panel installation!

 
Most issues such as leaks that occur during solar panel installation are due to the lack of knowledge of the solar panel installation contractors.
While specialized solar panel installation contractors have knowledge about solar panels, it is a reality that many lack knowledge regarding the roof and waterproofing at the installation site.
For peace of mind and to avoid maintenance and trouble after installation, it is better to have expertise in roofing!

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. Equipment specialized for exterior renovations

Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide solar work and exterior renovations at low cost and high quality.
We have established five bases centered around Yokohama City, Kanagawa Prefecture for material storage and showrooms.

In-house ownership of 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 reduce the costs associated with 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 procure materials at a lower cost!
Additionally, we always have a stock of roofing materials, enabling us to respond quickly in emergencies!

Separation and transportation of waste materials in-house

The installation of solar panels often involves roof work, generating various types of waste materials such as paint, wood, and metal.
Most contractors dispose of these materials all together, 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 costs associated with installing solar panels!

Since roofing and exterior wall work often accompany each other, we have samples of roofing materials and models that explain 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 everything, including sales and construction management, smooth communication is ensured.

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 roof 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 every year, and we send out notification DM each year.
If you have any questions about the warranty, please click on the image above!

Maintenance of Solar Power Generation｜Thorough Explanation of Importance, Frequency, and Cost Estimates!When introducing solar power generation, it is essential to consider...

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

We create various roof models to enhance skills 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 cases.

Corporate Profile神奈川で家の外装・屋根の工事、修理なら一番若くて親切な株式会社翔工務店にお任せください。 株式会社翔工務店はリフォームを通して美しく理想の生活空間を創るお手伝いをしています。外装改修、外壁塗装、雨樋修理清掃、屋根の塗装や重ね葺き葺き変えなどの部分的な修理まで、お客様のどのようなご要望にも全力でお応えします。...

Subsidies and Grants Available in Nakahara-ku, Kawasaki City, Kanagawa Prefecture that May Apply

National Subsidy: “Support Program for the Introduction of Storage Battery Systems in Homes”

The government is implementing the “Support Program 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 methods, 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 Homes”

In Kanagawa Prefecture, subsidies are provided for those who install “solar panels” and “home storage batteries” in existing homes.

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 system is part of measures against 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” solar panels that generate electricity for home use.

Eligible applicants are those who install solar power generation equipment in existing or newly built homes in the prefecture.

As a condition, it is required to consume more than 30% of the generated electricity for self-consumption (installation of storage batteries is also acceptable).

The subsidy amount is 10,000 yen per kW, with a maximum 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 system 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

1. Online Application
   
   　・Submit necessary information online, including the “Application for Grant” (paper applications are not accepted)

2. Submission of Completion Notification
   
   　・Within 30 days after the completion of construction, or by the earliest date of February 13, 2026 (Friday)

3. 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 after the completion of construction

• Deadline for Invoice Submission：March 6, 2026 (Friday)

■ Main Application Conditions and Required Documents

• No delinquency in municipal 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 applying for other subsidies

CopyEdit

👉 Click here for the official Kawasaki City page

Solar Panel Installation & Battery Storage Price List

⇧Construction Menu|For costs related to solar panel installation and battery storage, click here

⇧Construction Menu|For costs related to solar panel removal and water heater dismantling, click here

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 battery storage, you can get a rough estimate and profit simulation!

Customer Feedback

カテゴリ ‘voice’ は見つかりません

• customer reviews

  

  The craftsmen and their subordinates breathed perfectly, and I felt a sense of mutual trust.

• customer reviews

  

  The response was very fast, so I was able to make a decision right away.

• customer reviews

  

  They were energetic, polite and courteous, and very pleasant to deal with.

Examples of Solar Panel Installation

Construction Details

Solar Panel Installation 　Battery Installation

Existing Roofing Material

Horizontal Metal Roof (Super Galtect)

Installation Capacity

Solar Panel: 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 the subsidy provided, the actual burden amount is approximately 1 million yen 　Expected recovery period for construction costs: Approximately 8 to 9 years (self-consumption)

Construction Period

Approximately 3 days

Completion Month

April 2025

Inquiry Details

I am considering the installation of solar panels and storage batteries. I heard that subsidies are available, and I would like to know how much subsidy I can receive.

How to Choose a Solar Panel Installation Contractor in Nakahara-ku, Kawasaki

There are many solar panel installation contractors available in Nakahara-ku, Kawasaki, and it can be confusing to decide which one to choose.

Therefore,when requesting solar panel installation contractors or storage battery installation work, make sure to check the following 4 points.

By checking the above 4 points, you will be able to choose a reliable contractor.

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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.

Check for warranties and after-sales maintenance

When choosing a solar installation contractor, make sure to check for warranties.

While the 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 be sure to check if the contractor you are considering has after-sales service.
Since abnormalities or damage on the roof can be in hidden areas, you may 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 come for after-sales maintenance!

Warranty and Payment翔工務店の屋根工事、外壁塗装工事、シーリング工事の保証など簡単にご説明させて頂いております！！ 弊社では前金、中間金は頂いておりません！！...

Obtain estimates from multiple contractors (at least 3 companies)

When requesting the installation of solar panels, be sure to get estimates from multiple contractors.

Even for the same manufacturer and the same construction content, costs and warranties or after-sales services may differ.

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 for:

“Verification of estimate items”
“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!

【横浜市】屋根リフォームの相見積もりの重要性と比較するポイントを解説します！こんにちは！株式会社翔工務店です！ 横浜市の屋根リフォーム専門店の翔工務店です！こちらのページでは屋根リフォームの見積りをとる...

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 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 Systems

The benefits of installing solar panels are summarized in the five points below!

Benefit 1: Economic Benefits

The biggest advantage of installing solar panels is the economic benefit!
While the selling price of electricity has decreased compared to ten years ago, rising electricity costs allow you to benefit from consuming the power 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 power at night, installing a storage battery is essential!

Benefit 2: Subsidies can be utilized!

Conditions and amounts for 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 dependence on fossil fuels, helping to mitigate global warming.
It is considered an environmentally friendly method of power generation as it produces no noise or harmful substances during the process.

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 shielding 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!

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What Points Should Be Noted When Introducing Solar Power Generation?

Next, we will explain the “three points to note” when installing solar panels!

Point 1: Maintenance Costs Are 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 roof renovations 10 to 20 years later, there will be costs for removing and reinstalling 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 ask for a simulation considering maintenance costs before introducing solar panels!

Point 2: The Risk of Water Leakage Increases 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 of making holes in the roof, there is inevitably a risk of leaks.
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.

Catch-type base hardware for horizontal metal roofs

Note 3: The roof will become heavier

As solar panels are installed, the roof will become heavier. In the case of tile roofs, it may be reassuring to replace them with lighter roofing materials.

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How to Choose Solar Panels?

There are many manufacturers of solar panels, and the output (power generation) and costs vary.
It is not accurate to say “this manufacturer has the best solar panels”, and 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 the 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 a 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 output panel and a 400W output panel may seem that the higher output panel is better at first glance.
However, if the size of the panel does not fit well with the roof, “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 the output of a single panel!

Choosing Method 2: Compare based on the degradation rate of solar panels

Solar panels have a degradation rate, and their power generation gradually decreases over 10 or 20 years.
After 30 years, some may see a 40% decrease in power generation, while others may only see a decrease of about 10%.
Choosing based solely on initial power generation without considering the degradation rate will lead to regrets regarding your solar panels!

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!
Since a longer warranty is generally better, let’s check the warranties of the manufacturers you are considering!

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If you are looking for a solar panel installation contractor in Nakahara-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 Nakahara-ku, Kawasaki.
We have received 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 costs”, and we have received positive feedback from many 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 can perform all exterior renovations, including roof overlay work, roof replacement work, partial roof repairs, exterior wall painting, and exterior wall overlay methods, all in-house.
We are also happy to assist with small jobs such as partial repairs and rain gutter cleaning!

In case of emergencies such as leak repairs, we may be able to provide temporary measures without scaffolding, so please consult us!

“I want to know 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 position and will propose the best construction plan!

We are confident that we will not be outdone by other companies in terms of cost, quality, and organization for exterior work!
We welcome competitive estimates with confidence!
Estimates are completely free, and if you find our company to be inferior to others, you are free to decline!

Features of Nakahara-ku, Kawasaki

Nakahara-ku, Kawasaki, is located in the central part of the city, with a population of about 270,000 (as of 2023), making it the most populous ward in Kawasaki. It is an area that stretches along the Tama River and has developed as a transportation and industrial hub since ancient times. In recent years, redevelopment has progressed, and while high-rise apartments have increased, traditional shopping streets and residential areas remain, creating a vibrant streetscape.

The climate is mild, with relatively gentle winters that are comfortable, and summers can be hot, typical of urban areas, but the breeze from the Tama River can provide some coolness. The weather remains stable throughout the year, creating a comfortable living environment.

In terms of access, the JR Nambu Line and the Tokyu Toyoko Line and Meguro Line run through the area, with Musashi-Kosugi Station at the center, providing excellent access to Tokyo and Yokohama. Particularly, Musashi-Kosugi Station is also close to Shin-Yokohama Station, where the Shinkansen stops, making it a convenient location for both business and travel. Additionally, the bus routes are well-developed, allowing for smooth movement within and outside the ward.

The charm of Nakahara Ward lies in its balance of urban convenience and livability. The Musashi-Kosugi area is home to large commercial facilities and office buildings, offering a wide variety of shopping and dining options. On the other hand, the ward also has many natural spots and parks along the Tamagawa River, providing a relaxing environment. The residential areas are predominantly high-rise apartments, popular among a wide range of generations from singles to families.

Moreover, the area is well-equipped with educational institutions and medical facilities, making it a comfortable place for families with children. Traditional shopping streets and local events are also vibrant, creating an attractive region where new urban landscapes coexist with historical scenery. Thus, Nakahara Ward is an area where convenience, nature, and living environment are well-balanced, merging urban life with residential comfort.

Our company handles many exterior construction and solar power projects in Nakahara Ward, Kawasaki City.
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 Nakahara Ward, Kawasaki City

Kakeru Koumuten Co., Ltd. accepts requests from all over Kanagawa Prefecture and Tokyo.

Consultations via LINE are also very welcome◎

For roofing, guttering, and exterior work and repairs in Kanagawa, contact Kakerukoumuten Co., Ltd..

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!