Leave Your Solar Panel Installation Work in Hadano City, Kanagawa Prefecture to Kakeru Koumuten Co., Ltd.!

For solar panel and storage battery installation in
Hadano City, Kanagawa Prefecture,
Kakeru Koumuten is at your service!

Kakeru Koumuten is a company specializing in exterior renovations based in Kanagawa Prefecture.
We also handle exterior renovations in Hadano City, Kanagawa Prefecture,
and you can trust us with the installation of solar panels and storage batteries!
Here, we would like to introduce “Why Kakeru Koumuten is chosen for solar panel installation”.

“How to Choose a Solar Panel Contractor in Hadano City”
“About the Costs of Solar Panel and Storage Battery Installation”
“About Subsidies Available for Solar System Installation in Hadano City”
We will also explain the above three points!

The installation of solar panels carries risks, such as “the occurrence of leaks” and other 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 Hadano City,
this information will definitely be helpful, so please take a look!

Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installation in Hadano City, Kanagawa Prefecture

One reason our company is entrusted with solar panel installation by customers in Hadano City is
that we have a base within Kanagawa Prefecture,
but we also have “strengths in solar panel installation that cannot be imitated by other companies”
, which have 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 troubles such as leaks caused by solar panel installation are due to the lack of knowledge of the solar panel installation contractors.
While contractors specializing in solar panel installation have knowledge about solar panels, it is a reality that many lack knowledge about the roof and waterproofing at the installation site.
For peace of mind and to avoid maintenance issues and troubles after construction, it is safer 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 troubles after solar panel installation!

2. Equipment specialized in 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, allowing us to assemble the scaffolding in-house.
By conducting 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!

In-house sorting and transportation of waste materials

When installing solar panels, roofing work is often involved, 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 revenue and installation costs when introducing solar panels!

Since roofing and exterior wall work often accompany each other, we have samples of roofing materials and models that show 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., allowing 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 handles everything, including 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 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 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!

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.

If you cannot access the roof due to height, we can utilize a drone for assistance!
During leak investigations, we can also conduct surveys using a thermal imaging camera.

If the power generation of the solar panels decreases due to dirt, we can provide cleaning with a specialized brush.
We will respond according to your preferences.

7. Human Resource Development

To enhance 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 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。...

Potential Subsidies and Grants in Hadano City, Kanagawa Prefecture

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 procedures, please check the official website.

👉 Click here for the official website

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” and “home storage batteries” in already built houses.

The subsidy amounts are 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” 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 in the prefecture.

As a condition, it is required that more than 30% of the generated electricity is 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 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

Currently (August 2025), there are no ongoing subsidy or grant applications unique to Hadano City.
When new applications begin, announcements will be made on Hadano City’s official website, so please check for future updates or feel free to contact our company.

Solar Panel Installation & Storage Battery Installation Price List

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

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

Self-Estimate and Profit Simulation for Solar Power Generation

With the simulator above,
you can obtain an approximate estimate and a profit simulation for up to 30 years!
If you know the total installation capacity of the solar panels on the roof and the capacity of the battery, you can get an approximate 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 Manufactured Sales / Aluminum Catch Type Hardware

Price Range

2,200,000 yen to 2,300,000 yen 　*Due to the grant received, the actual burden is approximately 1,000,000 yen 　Estimated 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 Hadano City, Kanagawa Prefecture

There are many solar panel installation contractors that serve Hadano City, and it can be confusing to decide which one to choose.

Therefore, when requesting solar panel installation contractors or storage battery installation work, let’s confirm the following 4 points.

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

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Knowledge of roofs as well as solar panels is essential

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.

Confirm the presence of guarantees and aftercare maintenance

When choosing a solar installation contractor, make sure to check for the presence of guarantees.

While solar panels and batteries come with manufacturer warranties, also confirm whether there is a construction guarantee in case leaks occur after installation!

If the contractor has a warranty period, they will respond free of charge in case leaks occur after installation.

Additionally, some contractors offer aftercare services separate from the warranty, so be sure to check if the contractor you are considering has aftercare services.
Since abnormalities or damage on the roof may not be visible, you might not notice them yourself.
By conducting inspections during aftercare maintenance, you can detect issues early and prevent major repairs or failures!

Kakeru Koumuten Co., Ltd. provides a leak guarantee as part of the construction guarantee for solar panel installations.
We also conduct aftercare maintenance and send out annual DM!
Please check the DM, and if you wish, we will come for aftercare 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 solar panel installation, be sure to obtain estimates from multiple contractors.

Even with the same manufacturer and the same construction content, costs may vary, as well as warranties and after-sales services.

Additionally, obtaining multiple estimates makes it easier to negotiate prices.

To request your desired 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 services”

Make sure to compare these details closely! If the rank of auxiliary 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 the construction starts 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 Equipment

The benefits of installing solar panels are as follows!

Benefit 1: Economic Benefits

The biggest advantage of installing solar panels is the economic benefit!
Although the selling price of electricity has decreased compared to ten years ago, due to rising electricity costs, you can gain benefits by 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: You can utilize subsidies!

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 helps reduce carbon dioxide emissions and dependence on fossil fuels, contributing to the mitigation of 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 Use Possible 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 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 reassuring to request a simulation considering maintenance costs before introducing solar panels!

Point 2: The Risk of Leaks 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, there is an inevitable risk of leaks due to these 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.

Catch-type base hardware for horizontal metal roofs

Note 3: The roof will become heavier

Since solar panels will be placed on the roof, it 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 their output (power generation) and costs vary.
It is not simply a matter of “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 a limited area, and the more power generated, the better!

Solar panels vary in size depending on the manufacturer, and their power generation also differs.
For example, a 350W output panel and a 400W output panel may seem like the higher output panel is better at first glance.
However, if the size of the panels does not fit well on the roof, there may be cases where “20 panels of 350W can be installed” and “15 panels of 400W can be installed,” leading to different numbers of panels that can be installed on the same roof due to size differences.

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 see a 40% decrease in power generation, while others may only decrease by about 10%.
By not deciding solely based on initial power generation and considering the degradation rate, 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.
For 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!

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If you are looking for a solar panel installation company in Hadano City, Kanagawa Prefecture, please consult Kakeru Koumuten Co., Ltd.

Our company handles many exterior renovations, including solar panel installations, roof work, and exterior wall work in Hadano City.
We have received requests from many customers, including renovation companies and real estate companies, who have contacted us!

Kakeru Koumuten Co., Ltd. promises “high-quality renovations at low cost”, 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 to satisfy even more customers 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 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 down as much as possible,” “I just want an estimate for now“, we will provide the best solutions for your specific requests.
We will never propose unnecessary work that prioritizes profit!
We always stand in our customers’ shoes and will propose the optimal construction plan!

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

Characteristics of Hadano City, Kanagawa Prefecture

Hadano City, Kanagawa Prefecture, is a nature-rich city located in the western part of the prefecture, measuring approximately 13.6 km east to west and 12.8 km north to south, with an area of 103.61 square kilometers. It is about 60 km from the city center to Tokyo and about 37 km to Yokohama, making access to the metropolitan area convenient.

The climate of Hadano City belongs to the Pacific coastal climate, characterized by relatively mild temperatures throughout the year, with little frost or snowfall. The average annual temperature is 15.3 degrees, and the annual precipitation is 1,858 mm, which is relatively high in the prefecture. In winter, winds predominantly come from the northwest, while in summer, they come from the south, with weak wind speeds.

In Hadano City, the Odakyu Odawara Line runs east-west, with four stations: Tsurumaki Onsen Station, Tokai University Mae Station, Hadano Station, and Shibusawa Station. It takes about 1 hour and 10 minutes to reach Shinjuku Station from Hadano Station by express train, and approximately 1 hour when using the Limited Express Romancecar. Additionally, National Route 246 runs through the city from east to west, and the Hadano Nakai Interchange on the Tomei Expressway provides convenient access for driving to Tokyo and Yokohama. It takes about 40 minutes to reach the Tokyo Interchange and about 30 minutes to the Yokohama Machida Interchange.

Hadano City is home to the Tanzawa Mountains in the northern part, with the highest peak being Mt. Tō no Dake at an elevation of 1,490.9 meters. Many rivers flowing through the city originate from the clear streams of the Tanzawa Mountains, with the Minakawa River flowing through the central area, originating from Mt. Tō no Dake. The city is blessed with abundant and high-quality underground water, which has been selected as one of the “Top 100 Famous Waters in Japan,” and the city’s tap water is sourced from this underground water.

Thus, Hadano City is a livable area where nature and urban life harmonize, and it is gaining attention as a tourist destination and a place for relocation due to its excellent access to the city center.

Our company is based in Kanagawa Prefecture and handles many exterior construction and solar power projects in Hadano City. We are happy to assist with partial roof repairs such as roof overlay work, roof replacements, and leak repairs, as well as other repairs! Please feel free to consult us for any sudden troubles!

Service Areas in Hadano City, Kanagawa Prefecture

Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.

We welcome consultations via LINE as well◎

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!