For solar panel and storage battery installation in
Kawasaki-ku, Kawasaki,
Kakeru Koumuten is at your service!
Kakeru Koumuten is a company specializing in exterior renovations based in Kanagawa Prefecture.
We have handled numerous exterior renovations in Kawasaki-ku, Kawasaki,
and we are also entrusted with the installation of solar panels and storage batteries!
Here, we would like to introduce “Reasons why Kakeru Koumuten is chosen for solar panel installation”.
“How to choose a solar panel contractor in Kawasaki-ku”
“About the costs of solar panel and storage battery installation”
“About the subsidies applicable for solar system installation in Kawasaki-ku”
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 Kawasaki-ku,
this information will surely be helpful, so please take a look!
目次
- 1 Reasons why Kakeru Koumuten is chosen for solar panel installation in Kawasaki-ku
- 1.1 1. We also handle exterior renovations other than solar panel installation!
- 1.2 2. Facilities specialized in exterior renovations
- 1.3 3.Complete In-House Construction
- 1.4 4. Various Permits Obtained & Skilled Workers on Staff
- 1.5 5. Warranty and Aftercare
- 1.6 6. Flexible and Prompt Response
- 1.7 7. Human Resource Development
- 2 Subsidies and Grants Available in Kawasaki-ku, Kawasaki City, Kanagawa Prefecture that May Apply
- 2.1 National Subsidy: “Support Program for the Introduction of Storage Battery Systems in Homes”
- 2.2 Kanagawa Prefecture “Subsidy for Solar Power Generation Equipment and Home Storage Battery Installation for Existing Houses”
- 2.3 Kanagawa Prefecture “Subsidy for Self-Consumption Type Solar Power Generation Equipment”
- 2.4 Kawasaki City Solar Power Generation Equipment Installation Subsidy (Fiscal Year 7)
- 3 Solar Panel Installation & Battery Storage Pricing Table
- 4 Self-Estimate and Profit Simulation for Solar Power Generation
- 5 Customer Feedback
- 6 Examples of Solar Panel Installation
- 7 How to Choose a Solar Panel Installation Contractor in Kawasaki-ku, Kawasaki
- 8 Benefits of Introducing Solar Power Equipment
- 9 What points should you be aware of when introducing solar power generation?
- 10 How to Choose Solar Panels?
- 11 If you are looking for a solar panel installation contractor in Kawasaki City, Kawasaki Ward, please consult Kakeru Koumuten Co., Ltd.
- 12 Features of Kawasaki City, Kawasaki Ward
Reasons why Kakeru Koumuten is chosen for solar panel installation in Kawasaki-ku
One reason why we are entrusted with solar panel installation by customers in Kawasaki-ku
is that “Kakeru Koumuten is located in Yokohama”,
but we also have “strengths in solar panel installation that cannot be imitated by other companies”
, which has earned us high praise from many 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 caused by solar panel installation are due to the lack of knowledge of the solar panel installation contractors.
While specialists 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 for quick responses to maintenance and urgent troubles after solar panel installation!
2. Facilities specialized in exterior renovations
Kakeru Koumuten Co., Ltd. has prepared the following warehouses and material storage areas to provide 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 set up scaffolding in-house.
By conducting scaffolding work with our own scaffolding team instead of outsourcing, we can also cut 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, you can purchase 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 if you decide to introduce 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 ensured.
We can provide consistent in-house construction services 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 those for factories!
5. Warranty and Aftercare
In addition to the manufacturer’s warranty for solar panel installation, we also offer our own rain leak warranty!
Aftercare is available annually, and we send out notification DM every 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.
If you cannot access the roof due to height, we can utilize a drone to assist!
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 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.
The construction methods vary depending on the shape and slope of the roof, so we regularly provide technical training to ensure that all staff can handle various cases.
Subsidies and Grants Available in Kawasaki-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 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 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 within the prefecture.
Conditions include the requirement 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 limit of 4 kW (maximum 40,000 yen).
For example, if you install a 3 kW solar panel, you can receive a subsidy of 30,000 yen.
This program aims to promote the use of renewable energy and achieve Kanagawa Prefecture’s “Zero Carbon Society”.
For more details, please check the official page of Kanagawa Prefecture.
👉 Click here for details
Kawasaki City Solar Power Generation Equipment Installation Subsidy (Fiscal Year 7)
■ Eligible Equipment and Amounts
-
Solar Power Generation Equipment
30,000 yen per kW -
Stationary Lithium-ion Storage Battery
20,000 yen per 1kWh -
V2H Charging and Discharging Equipment
Flat rate of 100,000 yen
■ Procedure Flow
-
Online Application
・Submit necessary information online, including the “Application for Grant” (paper applications are not accepted) -
Submission of Completion Notification
・Within 30 days after the completion of construction, or by the earliest date of February 13, 2026 (Friday) -
Submission of Invoice (by mail in paper form)
・Submit an invoice with the applicant’s seal by March 6, 2026 (Friday)
■ Application Schedule
-
Application Acceptance Period：April 14, 2025 (Monday) – December 26, 2025 (Friday)
-
Deadline for Submission of Completion Notification：February 13, 2026 (Friday) or within 30 days after the completion of construction
-
Invoice Submission Deadline：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 planning to apply for other subsidies
-
Solar Panel Installation & Battery Storage Pricing Table
Self-Estimate and Profit Simulation for Solar Power Generation
With the simulator above,
you can get 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 storage, you can obtain an approximate estimate and profit simulation!
Customer Feedback
カテゴリ ‘voice’ は見つかりません
Examples of Solar Panel Installation
| Construction Details |
| Solar Panel Installation Battery Installation |
| Existing Roofing Material |
| Horizontal Metal Roof (Super Galtect) |
| Installation Capacity |
| Solar Panel: 4.3KW Battery: 5KW class |
| Base Mounting Hardware Used |
| Niigata Manufactured / 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 time for cost recovery: Approximately 8 to 9 years (self-consumption) |
| Construction Period |
| Approximately 3 days |
| Completion Month |
| April 2025 |
| Inquiry Details |
| I am considering the 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 installed 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 Kawasaki-ku, Kawasaki
There are many solar panel installation contractors available in Kawasaki-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, let’s confirm the following 4 points.
● Have extensive knowledge not only about solar panels but also about roofs
● Confirm the presence of warranties and after-sales maintenance
● Obtain estimates from multiple contractors (at least 3 companies)
● Confirm whether they provide support for subsidy applications
By confirming the above 4 points, you will be able to choose a reliable contractor.
Knowledge of roofing in addition to solar panels
Many causes of poor installation of solar panels stem from a lack of knowledge on the part of the contractor.
While knowledge about solar panels is certainly important, understanding the 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 severely deteriorated roof, leading to leaks.
・Solar panels were installed on a roof with a short lifespan, requiring a renovation to detach and reattach the panels within a few years.
・Misjudging the type of waterproofing 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.
Check for warranties and after-sales maintenance
When choosing a solar installation contractor, make sure to check for warranties.
While solar panels and storage batteries come with manufacturer warranties, also confirm whether there is a construction warranty in case of leaks 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 damages on the roof may not be visible, you might not notice them yourself.
By conducting inspections during after-sales maintenance, 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 after-sales maintenance and send out annual DM (direct mail)!
Please check the DM, and if you wish, we will visit you for after-sales maintenance!
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 details, costs and warranties or after-sales services may vary.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your preferred repair contractor at a lower price, it is essential to get estimates from multiple contractors.
When comparing estimates, please check carefully:
“Check the items in the estimate”
“Types of solar panels”
“Warranties and after-sales service”
Make sure to compare these details closely! If the quality of the materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
Check if they provide support for subsidy applications
Subsidies are often available for the installation of solar panels and storage batteries, but there is a possibility that they may not be granted due to application errors.
If you proceed with the support of the contractor, there should be no issues with the application.
Make sure to apply for the subsidy before starting the construction and proceed with the work 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 benefit of installing solar panels is the economic advantage!
While the selling price of electricity has decreased compared to ten years ago, due to rising electricity costs, you can benefit by 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 want to use the generated electricity at night, installing a storage battery is essential!
Benefit 2: Subsidies can be utilized!
The conditions and amounts of subsidies vary by prefecture and municipality, but there is a high probability that you can apply for subsidies!
Reducing the actual burden amount through subsidies is a significant advantage!
Benefit 3: Environmentally Friendly!
Solar power generation 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, the insulation properties are enhanced.
Especially in summer, it can effectively block direct sunlight, providing significant heat insulation benefits!
Benefit 5 Electricity can be used even during power outages!!
By installing a storage battery, it becomes possible to use electricity even during emergencies such as power outages!
What points should you be aware of when introducing solar power generation?
Next, we will explain the “three points to be cautious about” when installing solar panels!
Caution 1: Maintenance costs may be incurred
The maintenance costs are related more to the roof where the solar panels are installed rather than the solar panels themselves.
If you perform roof remodeling 10 to 20 years later, there will be costs associated with removing and reinstalling the solar panels.
If the existing roof is deteriorating, it is reassuring to remodel it with durable roofing materials before installing the solar panels!
It would be reassuring to ask for a simulation that considers maintenance costs before introducing solar panels!
Caution 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 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.
Special Catch Base Hardware for Horizontal Metal Roofs
Caution 3: The Roof Will Become Heavier
Installing solar panels will add weight to the roof. 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 panel and a 400W panel may seem like the higher output panel is better at first glance.
However, if the size of the panel does not fit well with 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 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 or 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!
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 longer warranties are generally better, be sure to check the warranties of the manufacturers you are considering!
If you are looking for a solar panel installation contractor in Kawasaki City, Kawasaki Ward, please consult Kakeru Koumuten Co., Ltd.
Our company handles many exterior renovations, including solar panel installations, roof work, and exterior wall work in Kawasaki City, Kawasaki Ward.
We receive requests from many customers, including renovation companies and real estate agencies, who have contacted us!
Kakeru Koumuten Co., Ltd. promises “high-quality renovations at low cost”, and we have received positive feedback from many customers.
We continue to update our construction performance every year, and we will strive to improve quality to satisfy even more customers 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 overlay methods.
We are also happy to handle small jobs such as 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!
“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“, and other specific requests will be met with optimal solutions.
We will never propose unnecessary work focused on profit!
We always stand in our customers’ shoes and will propose the best construction plans!
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 lacking compared to others, feel free to decline!
Features of Kawasaki City, Kawasaki Ward
Kawasaki City, Kawasaki Ward, is located in the eastern part of Kawasaki City and is one of the most vibrant areas in the city, with a population of about 230,000 (as of 2023). Geographically, it has the Tamagawa River as its northern boundary and is divided into coastal areas facing Tokyo Bay and inland areas. The coastal area has industrial zones, while the urban side has many commercial facilities.
In terms of access, there are several railway lines, including the JR Tokaido Line, Keihin Tohoku Line, and Keikyu Line, making it very convenient to travel to central Tokyo and Yokohama from Kawasaki Station. Additionally, the Shuto Expressway and National Route 15 are well-developed, allowing for smooth travel by car or public transportation.
Furthermore, it is close to Haneda Airport, making air travel convenient as well.
The charm of Aoba-ku, Kawasaki lies in its diversity and convenience. The area around Kawasaki Station is bustling with large commercial facilities, restaurants, and cinemas. It also has a strong global atmosphere, attracting many tourists from abroad. Additionally, there are scenic spots, making Aoba-ku, Kawasaki an attractive area that offers everything for work, life, and entertainment.
Our company handles many exterior construction and solar panel projects in Aoba-ku, Kawasaki.
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 Aoba-ku, Kawasaki
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Aoba-ku, Kawasaki
Aoba-ku Asada/Aoba-ku Asahimachi/Aoba-ku Ikegami Shinmachi/Aoba-ku Ikegamimachi/Aoba-ku Ikeda/Aoba-ku Sunako/Aoba-ku Isecho/Aoba-ku Egawa/Aoba-ku Ekimae Honmachi/Aoba-ku Enokicho/Aoba-ku Oiwakecho/Aoba-ku Oshima/Aoba-ku Oshima Kamimachi/Aoba-ku Ogawamachi/Aoba-ku Oda/Aoba-ku Oda Sakae/Aoba-ku Kaizuka/Aoba-ku Kawanakajima/Aoba-ku Kyomachi/Aoba-ku Kokan Dori/Aoba-ku Sakaimachi/Aoba-ku Sakuramoto/Aoba-ku Shimonamiki/Aoba-ku Showa/Aoba-ku Shinkawa Dori/Aoba-ku Daimachi/Aoba-ku Tajimacho/Aoba-ku Tamachi/Aoba-ku Daishi Ekimae/Aoba-ku Tsutsumine/Aoba-ku Dekino/Aoba-ku Tonochi/Aoba-ku Nakajima/Aoba-ku Nakase/Aoba-ku Nisshincho/Aoba-ku Hamamachi/Aoba-ku Higashidacho/Aoba-ku Higashimonzen/Aoba-ku Hinode/Aoba-ku Fujisaki/Aoba-ku Horinouchicho/Aoba-ku Honmachi/Aoba-ku Minatomachi/Aoba-ku Minamimachi/Aoba-ku Miyamaecho/Aoba-ku Miyamotocho/Aoba-ku Motoki/Aoba-ku Yotsuyakami/Aoba-ku Watada/Aoba-ku Watada Sannocho/Aoba-ku Watada Shinmachi/Aoba-ku Watada Higashimachi/Aoba-ku Watada Mukaimachi
・Trust Kakeru Koumuten for exterior renovations in Aoba-ku, Kawasaki!
・For roof renovations in Aoba-ku, Kawasaki, rely on Kakeru Koumuten!
・For exterior wall painting in Aoba-ku, Kawasaki, trust Kakeru Koumuten!
・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 comparison estimates and key points!
・Top 12 solar power manufacturers! Features and selection tips included!
・What are the installation costs for solar power? Comprehensive tips to reduce expenses!
・Where is the best place to install solar power? Key points for site selection included!
・Here is the introduction for solar power generation estimates!
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AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!
