For solar panel and battery installation in
Samukawa Town, Koza District, Kanagawa Prefecture,
Kakeru Koumuten Co., Ltd. is at your service!
Kakeru Koumuten Co., Ltd. is a company specializing in exterior renovations based in Kanagawa Prefecture.
We also handle exterior renovations in Samukawa Town, Koza District, Kanagawa Prefecture,
and you can trust us with the installation of solar panels and batteries!
Here, we would like to introduce“Why Kakeru Koumuten is chosen for solar panel installation”.
“How to choose a solar panel contractor in Koza District, Samukawa Town”
“About the costs of solar panel and battery installation”
“About subsidies applicable for solar system installation in Koza District, Samukawa Town”
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 isessential to obtain estimates from at least three companies!
For customers considering the introduction of solar panels in Samukawa Town, Koza District,
this information will definitely be helpful, so please take a look!
目次
- 1 Reasons why Kakeru Koumuten is chosen for solar panel installation in Samukawa Town, Koza District, Kanagawa Prefecture
- 1.1 1. We also handle exterior renovations other than solar panel installation!
- 1.2 2. Equipment specialized for 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 Subsidies and Grants Available in Samukawa Town, Koza District, Kanagawa Prefecture
- 2.1 National Subsidy: “Support Program for the Introduction of Storage Battery Systems in Housing”
- 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 Samukawa Town “Zero Carbon Promotion Measures Equipment Subsidy”
- 3 Solar Panel Installation & Storage Battery Installation Price List
- 4 Self-Estimate and Profit Simulation for Solar Power Generation
- 5 Customer Testimonials
- 6 Examples of Solar Panel Installations
- 7 How to Choose a Solar Panel Installation Contractor in Samukawa, Koza District, Kanagawa Prefecture
- 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 company in Samukawa, Koza District, Kanagawa Prefecture, please consult Kakeru Koumuten Co., Ltd.
- 12 Features of Samukawa, Koza District, Kanagawa Prefecture
Reasons why Kakeru Koumuten is chosen for solar panel installation in Samukawa Town, Koza District, Kanagawa Prefecture
One reason our company is entrusted with solar panel installation by customers in Samukawa Town, Koza District,
is that we have a base in Kanagawa Prefecture,
but we also have“strengths in solar panel installation that cannot be imitated by other companies”,
which has received high praise from many customers.
the solar panel installation work in Samukawa Town, Koza District, so we would be grateful if you could compare it with estimates from other companies.
Since 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, many lack knowledge regarding the roof and waterproofing at the installation site, which is a reality…
It’s safer to have someone knowledgeable about roofs to avoid maintenance and troubles after construction!
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 for exterior renovations
At Kakeru Koumuten, we have prepared the following warehouses and material storage areas to provide solar construction 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 temporary scaffolding required for solar panel installation work, allowing us to assemble the scaffolding ourselves.
By performing 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, allowing us to respond quickly even 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 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 hold meetings, but you can also
check the actual foundation brackets for solar panels and see how they are attached to the roofing materials!
We can also provide simulations for the potential earnings and installation costs if you decide to implement 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 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 technicians on staff, ensuring confidence in our construction techniques.
We are capable of handling large-scale roofing projects such as 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 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 surveys 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 are creating various roof models to enhance our skills and conducting 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.
Subsidies and Grants Available in Samukawa Town, Koza District, Kanagawa Prefecture
National Subsidy: “Support Program for the Introduction of Storage Battery Systems in Housing”
The government is implementing the “Support Program for the Introduction of Storage Battery Systems in Housing” 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 storage batteries for residential use 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 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” or “home storage batteries” in already constructed 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 in homes.
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 on-site (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
For more details, please click here
Solar Panel Installation & Storage 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 cash flow 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 cash flow simulation!
Customer Testimonials
Examples of Solar Panel Installations

| 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 |
| 2.2 million yen to 2.3 million yen *Due to the subsidy provided, the actual burden amount is approximately 1 million 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 a storage battery. 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 blueprints!
The layout diagram shows the arrangement of solar panels when placed on the roof.
Since we can also determine the installation capacity, it allows for power generation simulations and financial simulations.
We have also understood the expected amount of subsidies, which we explained to the customer along with the estimate!
How to Choose a Solar Panel Installation Contractor in Samukawa, Koza District, Kanagawa Prefecture
There are many solar panel installation contractors available in Samukawa, Koza District, and it can be confusing to choose the right one.
Therefore,when requesting solar panel installation or storage battery installation work, let’s check the following 4 points.
● Have extensive knowledge not only about solar panels but also about roofs
● Confirm the presence of warranties and aftercare services
● Obtain estimates from multiple contractors (at least 3 companies)
● Check if 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 roofing and waterproofing at the installation site is also crucial.
⚠︎Examples of troubles caused by contractor’s lack of knowledge
・Solar panels were installed on a deteriorated roof, leading to leaks..
・Solar panels were installed on a roof with a short lifespan, requiring renovations to detach and reattach the panels within a few years..
・Misjudging the type of waterproofing led to incorrect treatment and subsequent leaks..
and more
When installing solar panels, understanding the condition and type of the existing roof allows you to avoid unnecessary expenses and unexpected troubles.
Confirm the presence of warranties and aftercare services
When choosing a solar installation contractor, make sure to check for warranties.
While solar panels and 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 the event of leaks after installation.
Additionally, some contractors offer aftercare services separate from warranties, 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, you can detect issues early and prevent major repairs or failures!
Kakeru Koumuten Co., Ltd. provides a leak warranty as part of the construction warranty for solar panel installations.
We also conduct aftercare services and send out annual DM notifications!
Please check the DM, and if you wish, we will come for aftercare services!
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 type of work, costs may vary, as well as warranties and after-sales services.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your preferred contractor at a lower price, it is essential to obtain estimates from multiple companies.
When comparing estimates, please check carefully:
“Check the items in the estimate”
“Type of solar panels”
“Warranties and after-sales services”
Make sure to compare these details! 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 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 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, rising electricity costs allow you to benefit from consuming the power you generate!
Electricity prices are expected to continue to rise, 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!
Subsidy conditions and amounts vary by prefecture and municipality, but there is a high probability that subsidy applications can be made!
Reducing the actual burden amount through subsidies is a significant advantage!
Benefit 3: Environmentally friendly!
Solar power generation contributes to the reduction of greenhouse gas emissions and decreases reliance on fossil fuels, thus helping to mitigate global warming.
It is considered an environmentally friendly power generation method as it does not produce noise or harmful substances during the generation 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 Use Possible 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 aware of” when installing solar panels!
Point 1: Maintenance costs may be incurred
The maintenance costs are more related 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 consider maintenance costs in advance and request a simulation 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.
Special Catch Base Hardware for Horizontal Metal Roofs
Note 3: The Roof Will Become Heavier
With the addition 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 the 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 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 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.
Regarding the output warranty, some manufacturers offer a 30-year warranty while others provide a 10-year warranty, so it varies widely!
A longer warranty is always better, so let’s check the warranties of the manufacturers you are considering!
If you are looking for a solar panel installation company in Samukawa, Koza District, 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 Samukawa, Koza District.
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 cost”, and we have received positive feedback from numerous customers.
We continue to update our construction performance records every year and will strive to improve quality to satisfy even more customers in the future.
Our company can perform all exterior renovations, not only roof overlay and re-roofing but also partial roof repairs, exterior wall painting, and exterior wall cover methods.
We are also happy to assist with small jobs like partial repairs and rain gutter cleaning!
In case of emergencies like leak repairs, we may be able to provide temporary measures without scaffolding, so please consult with 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 the best solutions for your specific requests.
We will never propose unnecessary work that prioritizes profit!
We always stand in the customer’s position and will propose the optimal construction plan!
We are confident that we will not be outdone in terms of cost, quality, and planning for exterior work compared to other companies!
We welcome competitive estimates!
Estimates are completely free, and if you find our company lacking compared to others, feel free to decline!
Features of Samukawa, Koza District, Kanagawa Prefecture
Samukawa, Koza District, Kanagawa Prefecture, is located almost in the center of the prefecture and is a town rich in natural surroundings. The Sagami River, a first-class river, flows to the west, and the town enjoys a warm and gentle climate with a mild sea breeze. The average annual temperature is about 15 degrees, making it comfortable throughout the four seasons.
Transportation access is also good. The “Samukawa Shrine” is a 5-minute walk from Miyama Station on the JR Sagami Line, and it is about 1 km from the Kanagawa Chuo Expressway Samukawa North IC, making it convenient for car travel. Major trunk roads are well-maintained within the town, allowing smooth access to surrounding cities.
It is a calm town where history and nature blend together, and thanks to the development of the Ken-O Expressway, transportation convenience has improved, creating an even more livable environment in recent years. Despite being a green-rich area, its accessibility to the city center and neighboring cities is also attractive. It can be said to be an area suitable for those seeking a spacious lifestyle.
Our company is based in Kanagawa Prefecture and has undertaken many exterior construction and solar power projects in Samukawa, Koza District. 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 Samukawa, Koza District, Kanagawa Prefecture
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
List of Areas in Samukawa, Koza District
Ichinomiya, Samukawa / Okura, Samukawa / Oomagari, Samukawa / Okada, Samukawa / Kurami, Samukawa / Kotani, Samukawa / Kodou, Samukawa / Tabata, Samukawa / Nakase, Samukawa / Miyayama, Samukawa
・Exterior wall painting in Samukawa, Koza-gun, Kanagawa is entrusted to Kakeru Koumuten Co., Ltd.!
・Roof renovations in Samukawa, Koza-gun, Kanagawa are entrusted to Kakeru Koumuten Co., Ltd.!
・Exterior renovations in Samukawa, Koza-gun, Kanagawa are entrusted to Kakeru Koumuten Co., Ltd.!
・Kakeru Koumuten Co., Ltd. construction achievements
・Kakeru Koumuten Co., Ltd. aftercare services
・Kakeru Koumuten Co., Ltd. construction menu and price list
・Kakeru Koumuten Co., Ltd. staff blog and announcements
・Explaining the importance of comparative estimates and points to consider!
・Top 12 solar power generation manufacturers! Features and selection tips included!
・What are the installation costs for solar power generation? Comprehensive tips to reduce costs!
・What are the best locations for installing solar power generation? Points for selecting installation sites included!
・For solar power generation estimates, click here!
We welcome consultations via LINE as well◎
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!







