For solar panel and battery installation in
Zushi 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 Zushi City, Kanagawa Prefecture,
and you can trust us with the installation of solar panels and batteries!
Here, we would like to introduce “Reasons why Kakeru Koumuten is chosen for solar panel work”.
“How to choose a solar panel contractor in Zushi City”
“Costs for solar panel and battery installation”
“Subsidies available for solar system installation in Zushi 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 Zushi City,
this information will definitely be helpful, so please take a look!
目次
- 1 Reasons why Kakeru Koumuten is chosen for solar panel work in Zushi City, 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 Zushi City, Kanagawa Prefecture that May Apply
- 2.1 National Subsidy: “Support Program for Introducing Storage Battery Systems in Homes”
- 2.2 Kanagawa Prefecture “Subsidy for Solar Power Generation Equipment and Home Storage Battery Installation for Existing Homes”
- 2.3 Kanagawa Prefecture “Subsidy for Installation of Self-Consumption Type Solar Power Generation Equipment”
- 2.4 Zushi City “Subsidy for Introduction of Renewable Energy, Energy Saving, and Energy Storage Equipment”
- 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 Zushi City, Kanagawa Prefecture
- 8 Benefits of Introducing Solar Power Equipment
- 9 What Points Should You Be Careful About When Introducing Solar Power Generation?
- 10 How to Choose Solar Panels?
- 11 If you are looking for a solar panel installation company in Zushi City, Kanagawa Prefecture, please consult Kakeru Koumuten Co., Ltd.
- 12 Features of Zushi City, Kanagawa Prefecture
Reasons why Kakeru Koumuten is chosen for solar panel work in Zushi City, Kanagawa Prefecture
One reason our customers in Zushi City trust us with solar panel installation is that we “have a base in Kanagawa Prefecture.”
Additionally, we have “strengths in solar panel installation that cannot be replicated by other companies,”
which has garnered us many satisfied customers.
We would be grateful if you could compare our estimates with those of other companies.
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 that occur during 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.
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 for exterior renovations
Kakeru Koumuten Co., Ltd. has 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 the installation of solar panels, allowing us to assemble the scaffolding ourselves.
By conducting scaffolding work with our own scaffolding team instead of outsourcing, we can also cut costs on 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
When installing solar panels, roofing work is often involved, resulting in various 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 reductions can be achieved on waste disposal fees.
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. 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 carry out consistent in-house construction from temporary scaffolding installation, exterior wall painting, to 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 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
We create various roof models to improve our skills and conduct practical training.
Since the construction method varies 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 Zushi City, Kanagawa Prefecture that May Apply
National Subsidy: “Support Program for Introducing Storage Battery Systems in Homes”
The government is implementing the “Support Program for Introducing 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 Homes”
In Kanagawa Prefecture, subsidies are provided for those who install “solar panels” or “home storage batteries” in already constructed homes.
The subsidy amounts are 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 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 Installation of 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 homes in 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 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
Zushi City “Subsidy for Introduction of Renewable Energy, Energy Saving, and Energy Storage Equipment”
Solar Power Generation System
Eligible for Subsidy:
- New installation in residential areas
- Not using the FIT/FIP system
- Consuming more than 30% of the generated electricity on-site
- Integrated building materials and solar carports are excluded. However, if the power generation equipment can be clearly separated, it may be eligible.
- No delinquency in municipal taxes and not a member of organized crime
- No pre-commencement (however, if unavoidable, submitting a “Pre-Commencement Notification” will make it eligible)
Subsidy Amount
Up to 150,000 yen per case.
Eligible Expenses and Limits: The lesser of the eligible expenses and the subsidy limit (150,000 yen) will be provided.
Energy Storage System (Stationary Battery)
Eligibility: Only applicable when installed simultaneously with a solar power generation system. Standalone installation is not eligible.
Subsidy Amount
Up to 150,000 yen per case. The lower of the eligible expenses and the subsidy limit will apply.
Solar Panel Installation & Battery Installation Price List
Self-Estimate and Profit Simulation for Solar Power Generation
With the simulator above,
you can obtain an estimated quote 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, you can get an estimated quote and profit simulation!
Customer Testimonials
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 |
| 2.2 million yen to 2.3 million yen *Due to subsidies being 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 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 blueprints!
The layout diagram shows the arrangement of solar panels when placed on the roof.
It also allows us to understand the installation capacity, enabling power generation simulations and financial simulations.
We have 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 Zushi City, Kanagawa Prefecture
There are many solar panel installation contractors available in Zushi City, and it can be confusing to choose the right one.
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 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 of 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 were installed on a severely deteriorated roof, leading to leaks..
・Solar panels were installed on a roof with a short lifespan, necessitating a costly removal and reinstallation 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, be sure to check for warranties.
While the solar panels and batteries come with a manufacturer’s warranty, also confirm whether there is a construction warranty in case of leaks after installation!
If the contractor offers a warranty period, they will address any leaks that occur after installation at no charge.
Additionally, some contractors provide 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. offers a leak warranty as part of the construction warranty for solar panel installations.
We also provide aftercare services and send out annual DM notifications!
Please check the DM, and if you wish, we will arrange to visit for aftercare services!
Obtain estimates from multiple contractors (at least 3 companies)
When requesting solar panel installation, be sure to get 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 preferred repair contractor at a lower price, it is essential to obtain estimates from multiple contractors.
When comparing estimates, please check carefully the following:
“Check the items in the estimate”
“Type of solar panels”
“Warranties and after-sales services”
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 judgments 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 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 introducing solar panels are summarized in the five points below!
Benefit 1: Economic Benefits
The biggest benefit of introducing solar panels is the economic advantage!
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 to rise, 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!
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 greenhouse gas 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, leading to 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 Points Should You Be Careful About When Introducing Solar Power Generation?
Next, we will explain the “three points to be careful about” when installing solar panels!
Point 1: Maintenance Costs May Be Incurred
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 comforting to request a simulation that considers 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 unavoidable 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 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 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 installation capacities on the same roof due to the size difference.
400W × 15 panels = 6kW (Total power generation output of the roof)
350W × 20 panels = 7kW (Total power generation output 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%.
Choosing based solely on initial power generation without considering the degradation rate will lead to regrets later on!
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 company in Zushi 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 Zushi City.
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 achievements every year, and we will strive to improve quality so that even more customers can be satisfied in the future.
Our company can perform all exterior renovations, not only roof overlay work and re-roofing but also partial roof repairs, exterior painting, and exterior wall cover methods.
We are also happy to handle small jobs like partial repairs and rain gutter cleaning!
In case of emergencies like leak repairs, we may also be able to provide temporary measures without scaffolding, so please consult us!
Whether you want to know about recommended solar panels, keep costs down, or just get an estimate, we will provide the best solutions for your specific requests.
We will never propose unnecessary work focused on profit!
We always stand in our customers’ shoes and will propose the optimal construction plan!
We are confident that we will not be outdone in terms of cost, quality, and organization compared to other companies for exterior work!
We welcome competitive estimates!
Estimates are completely free, and if you find our company lacking compared to others, feel free to decline!
Features of Zushi City, Kanagawa Prefecture
Zushi City, Kanagawa Prefecture, is an attractive city blessed with a rich natural environment and a mild climate. The city features beautiful coastlines and lush mountains, allowing you to enjoy seasonal landscapes.
Zushi City belongs to a mild maritime climate, characterized by relatively gentle weather throughout the year. Summers are hot and humid, while winters are relatively mild with rare snowfall. The annual precipitation is average, with significant rainfall during the rainy season. Surrounded by the sea and mountains, the terrain allows you to feel the seasonal changes in nature up close.
Good access from the metropolitan area is also a feature of Zushi City. The JR Yokosuka Line and Keikyu Electric Railway are the main means of transportation. Zushi Station on the JR Yokosuka Line is about 1 hour direct from Tokyo Station and about 30 minutes from Yokohama Station. Keikyu Zushi-Hayama Station is also available, with access from Shinagawa Station in about 50 minutes.
Access by car is convenient, with smooth travel from the city center and nearby cities using the Zushi Interchange on the Yokohama-Yokosuka Road. However, during tourist seasons and weekends, the roads can become congested, so the use of public transportation is sometimes recommended.
Zushi City is dotted with numerous natural landscapes and historical sites. Notable spots include “Zushi Beach,” “Hirouyama Park,” and “Nagoe Pass.” Additionally, there are plenty of hiking trails and marine sports, making it a popular area for outdoor enthusiasts.
Zushi City is a livable town where nature and urban life harmonize, and it is also gaining attention as a destination for tourism and relocation due to its good access to the city center.
Our company is based in Kanagawa Prefecture and handles many exterior construction and solar power projects in Zushi 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 for any urgent issues!
Service Areas in Zushi City, Kanagawa Prefecture
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
List of Areas in Zushi City
Zushi City Ikego / Zushi City Kotsubo / Zushi City Sakurayama / Zushi City Shinjuku / Zushi City Zushi / Zushi City Numama / Zushi City Kuki / Zushi City Yamanone
・Leave your exterior wall painting in Zushi, Kanagawa to Kakeru Koumuten Co., Ltd.!
・Trust Kakeru Koumuten Co., Ltd. for your roof renovation in Zushi, Kanagawa!
・Count on Kakeru Koumuten Co., Ltd. for your exterior renovation in Zushi, Kanagawa!
・Kakeru Koumuten Co., Ltd. Project Achievements
・Kakeru Koumuten Co., Ltd. Aftercare Services
・Kakeru Koumuten Co., Ltd. Service Menu and Price List
・Kakeru Koumuten Co., Ltd. Staff Blog and Announcements
・Explaining the Importance of Comparing Estimates!
・Top 12 Solar Power Manufacturers! Features and Selection Tips Included!
・What are the installation costs for solar power? Comprehensive tips to reduce costs!
・What are the best locations for installing solar power? Key points for site selection!
・Find out more about solar power estimates 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!







