For solar panel and storage battery installation in
Minami-ku, Sagamihara,
Kakeru Koumuten is your trusted choice!
Kakeru Koumuten is a company specializing in exterior renovations based in Kanagawa Prefecture.
We have handled numerous exterior renovations in Minami-ku, Sagamihara,
and we are also entrusted with the installation of solar panels and storage batteries!
Here, we will introduce“Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installations”.
“How to Choose a Solar Panel Contractor in Minami-ku, Sagamihara”
“Costs for Solar Panel and Storage Battery Installation”
“Subsidies Available for Solar System Implementation in Minami-ku, Sagamihara”
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 Minami-ku, Sagamihara,
this information will definitely be helpful, so please take a look!
目次
- 1 Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installations in Minami-ku, Sagamihara
- 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 Potential Subsidies and Grants in Minami-ku, Sagamihara City, Kanagawa Prefecture
- 2.1 National Subsidy: “Support Project for the Introduction of Storage Battery Systems in Housing”
- 2.2 Kanagawa Prefecture “Subsidy for Solar Power Generation Equipment and Home Storage Battery Installation in Existing Houses”
- 2.3 Kanagawa Prefecture “Subsidy for Self-Consumption Type Solar Power Generation Equipment”
- 2.4 Sagamihara City “Incentive Grant for Residential Smart Energy Equipment Installation”
- 3 Solar Panel Installation & Storage Battery Installation Price List
- 4 Self-Estimate and Profit Simulation for Solar Power Generation
- 5 Customer Feedback
- 6 Installation Examples of Solar Panels
- 7 How to Choose a Solar Panel Installation Contractor in Minami-ku, Sagamihara
- 8 Benefits of Introducing Solar Power Equipment
- 9 What points should be noted when introducing solar power generation?
- 10 How to Choose Solar Panels?
- 11 If you are looking for a solar panel installation contractor in Minami-ku, Sagamihara, please consult Kakeru Koumuten Co., Ltd.
- 12 Features of Minami-ku, Sagamihara
Reasons Why Kakeru Koumuten is Chosen for Solar Panel Installations in Minami-ku, Sagamihara
The reasons our company is entrusted with solar panel installations by customers in Minami-ku, Sagamihara
are based on“Our Unique Strengths in Solar Panel Installation that Cannot Be Imitated by Other Companies”
, which have received 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 as many companies as possible!
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 specialized contractors have knowledge about solar panels, many lack knowledge about 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 better to have expertise in roofing!
Kakeru Koumuten Co., Ltd. is strong in roofing work and can also detach and attach solar panels in-house, allowing for quick responses 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 in Kanagawa Prefecture for material storage and showrooms.
In-house ownership of scaffolding materials


We own the scaffolding materials necessary for the installation of solar panels and can assemble the scaffolding ourselves.
By performing the scaffolding work with our own scaffolding team instead of outsourcing, we can also reduce the cost of 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, so we can respond quickly in emergencies!
Separation and transportation of waste materials in-house
The installation of solar panels often involves roofing work, generating various types of waste materials such as paint, wood, and metal.
While most contractors dispose of these materials together, sorting and recycling the waste can lead to significant cost reductions in waste disposal fees.
Exterior Renovation Dedicated Showroom


In our showroom, not only can you have meetings, but you can also
You can check the actual foundation brackets for solar panels and how they are installed on the roofing materials!
It is also possible to simulate 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 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 permits for construction work and 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 rain leak warranty!
Aftercare is available annually, and we send out reminder DM notifications 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 utilize drones 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 or other factors, we can also provide cleaning services using specialized brushes.
We will respond according to your preferences.
7. Human Resource Development
To enhance our 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 scenarios.
Potential Subsidies and Grants in Minami-ku, Sagamihara City, Kanagawa Prefecture
National Subsidy: “Support Project for the Introduction of Storage Battery Systems in Housing”
The government is implementing the “Support Project 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) to 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 in Existing Houses”
In Kanagawa Prefecture, subsidies are provided for those who install “solar panels” and “home storage batteries” in existing homes.
The subsidy amount is a flat 40,000 yen for solar power generation equipment only, up to 100,000 yen for storage batteries depending on capacity, and a total of up to 300,000 yen when both are installed simultaneously.
This system is part of measures against global warming and aims to promote the use of renewable energy.
For detailed conditions and application methods, please check the official page of Kanagawa Prefecture.
👉 Click here for details
Kanagawa Prefecture “Subsidy for Self-Consumption Type Solar Power Generation Equipment”
In Kanagawa Prefecture, subsidies are provided for the installation of “self-consumption type” 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.
As a condition, it is required that more than 30% of the generated electricity is 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 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
Sagamihara City “Incentive Grant for Residential Smart Energy Equipment Installation”
Requirements
-
Installation Location: The target is a residential building located within Sagamihara City where the owner resides.
-
Target Equipment Conditions (Solar Power):
-
The electricity generated is consumed by the household, with surplus power being fed back into the grid.
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The rated output must be 2 kW or more and less than 10 kW.
-
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If multiple systems are installed, separate applications are required for each period when the installation completion dates differ.
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There must be no delinquency in municipal taxes, and the individual must not be affiliated with organized crime.
Eligible Individuals
Individuals who reside in Sagamihara City and own a home are eligible (both new and existing homes are acceptable).
Subsidy Amount (Common)
The subsidy amount is provided uniformly.
| Course | Eligible Equipment | Subsidy Amount |
|---|---|---|
| Solar Power Only | Solar Power Generation System (2–10 kW) | 80,000 yen |
| Self-Consumption | Stationary Lithium-ion Storage Battery or V2H | 200,000 yen each |
| ZEH Housing | Net Zero Energy Housing | 300,000 yen |
| LCCM Housing | Additional for High-Efficiency Housing in addition to ZEH Housing | Additional 100,000 yen |
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 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 storage battery, you can get a rough estimate and profit simulation!
Customer Feedback
Installation Examples of Solar Panels


| Construction Details |
| Solar Panel Installation Battery Installation |
| Existing Roofing Material |
| Horizontal Metal Roof (Super Galtect) |
| Installation Capacity |
| Solar Panels: 4.3KW Battery: 5KW class |
| Base Mounting Hardware Used |
| Niigata Manufacturing / Aluminum Catch Type Hardware |
| Price Range |
| 2.2 million yen to 2.3 million yen *Due to 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 a storage battery. I have 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 drawings!
The layout diagram shows the arrangement of the 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, and we explained this to the customer along with the estimate!
How to Choose a Solar Panel Installation Contractor in Minami-ku, Sagamihara
There are many solar panel installation contractors available in Minami-ku, Sagamihara, 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 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 due to 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, necessitating a costly removal and reinstallation within a few years..
・Misjudgment of 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 unforeseen troubles.
Check for warranties and after-sales maintenance
When choosing a solar installation contractor, make sure to check for warranties.
While the solar panels and storage batteries come with manufacturer warranties, also confirm whether there is a construction warranty in case leaks occur after installation!
Contractors that offer warranty periods will address any leaks that occur after installation free of charge.
Additionally, some contractors provide after-sales services separately from warranties, so be sure to check if the contractor you are considering has after-sales service.
Issues or damage on the roof can be in areas that are not visible, so you may not notice them yourself.
By conducting inspections during after-sales maintenance, you can detect problems 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 offer after-sales maintenance, sending out annual DM reminders!
Please check the DM, and if you wish, we will come to provide after-sales maintenance!
Obtain estimates from multiple contractors (at least 3 companies)
When requesting the installation of solar panels, be sure to get estimates from multiple contractors.
Even for the same manufacturer and the same construction 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 obtain estimates from multiple contractors.
When comparing estimates, please check carefully:
“Verification of estimate items”
“Types of solar panels”
“Warranties and after-sales service”
Make sure to compare these details closely! If the quality of the materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
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 Advantage
The biggest advantage of installing solar panels is the economic benefit!
While the selling price of electricity has decreased compared to ten years ago, the rising electricity costs allow you to benefit from 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: 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 contributes to the reduction of carbon dioxide emissions and decreases dependence 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!!
Installing on the roof or rooftop enhances insulation properties.
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 be noted when introducing solar power generation?
Next, we will explain the “three points to note” when installing solar panels!
Point 1: Maintenance costs may be incurred
Maintenance costs refer 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 also 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 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
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 widely.
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 by 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 the limited area, and the more power generated, the better!
Solar panels come in various sizes depending on the manufacturer, and their power generation also differs.
For example, a 350W output panel and a 400W output panel may seem that the higher output panel is better at first glance.
However, if the size of the panel does not fit well 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 by 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 panels may have 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 by 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!
Since a longer warranty is always better, let’s check the warranties of the manufacturers you are considering!
If you are looking for a solar panel installation contractor in Minami-ku, Sagamihara, please consult Kakeru Koumuten Co., Ltd.
Our company handles a wide range of exterior renovations, including solar panels, roof work, and exterior wall work in Minami-ku, Sagamihara.
We have received many requests from customers, including renovation companies and real estate agencies, who have contacted us!
Kakeru Koumuten Co., Ltd. promises “high-quality renovations at low costs”, and we have received positive feedback from many customers.
We continue to update our construction performance every year, and we will strive to improve quality to satisfy even more customers in the future.
Our company can handle all exterior renovations, not only roof overlay work and re-roofing but also partial roof repairs, exterior painting, and exterior cover methods.
We are also happy to assist with small jobs like partial repairs and rain gutter cleaning!
In case of emergencies like roof leaks, we may also be able to provide temporary measures without scaffolding, so please consult with 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 optimal solutions for your specific requests.
We will never propose unnecessary work that prioritizes profit!
We always stand in the customer’s shoes and will propose the best construction plan!
We are confident that we will not be outdone in terms of cost, quality, and planning 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!
Features of Minami-ku, Sagamihara
Minami-ku, Sagamihara City, Kanagawa Prefecture, is located in the southeastern part of the city and is an area where commerce, residential, and industry have developed in a balanced manner. Centered around Sagami-Ono, there are large commercial facilities and medical institutions, and with the JR Yokohama Line and Odakyu Line running through, access to Yokohama and Tokyo is also excellent.
Additionally, the area features vast parks like Sagamihara Asamizoko Park and sports and leisure facilities such as Sagamihara Gion Stadium, creating a green environment. Furthermore, it is known as an educational district, gathering many educational institutions, making it a popular area for families raising children.
Our company handles many exterior construction and solar work in Minami-ku, Sagamihara.
We are happy to assist with partial roof repairs, roof overlay work, roof re-roofing, and leak repairs, as well as other repairs! Please feel free to consult us about sudden troubles!
Service Areas in Minami-ku, Sagamihara
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo Metropolis.
List of Areas in Minami-ku, Sagamihara City
Asahi-cho, Minami-ku, Sagamihara City / Asamizodai, Minami-ku, Sagamihara City / Shinisono, Minami-ku, Sagamihara City / Isobe, Minami-ku, Sagamihara City / Unomori, Minami-ku, Sagamihara City / Ohnodai, Minami-ku, Sagamihara City / Kamitsuruma, Minami-ku, Sagamihara City / Kamitsuruma Honmachi, Minami-ku, Sagamihara City / Kitasato, Minami-ku, Sagamihara City / Furubuchi, Minami-ku, Sagamihara City / Sakae-cho, Minami-ku, Sagamihara City / Sagami-Ono, Minami-ku, Sagamihara City / Sagamidai Danchi, Minami-ku, Sagamihara City / Sagamidai, Minami-ku, Sagamihara City / Sakuradai, Minami-ku, Sagamihara City / Shimomizo, Minami-ku, Sagamihara City / Shindo, Minami-ku, Sagamihara City / Ainan, Minami-ku, Sagamihara City / Sobudai Danchi, Minami-ku, Sagamihara City / Sobudai, Minami-ku, Sagamihara City / Toma, Minami-ku, Sagamihara City / Nishi-Onuma, Minami-ku, Sagamihara City / Higashi-Onuma, Minami-ku, Sagamihara City / Higashi-Rinkan, Minami-ku, Sagamihara City / Futaba, Minami-ku, Sagamihara City / Bunkyo, Minami-ku, Sagamihara City / Matsugae-cho, Minami-ku, Sagamihara City / Misono, Minami-ku, Sagamihara City / Minami-dai, Minami-ku, Sagamihara City / Toyo-cho, Minami-ku, Sagamihara City / Wakamatsu, Minami-ku, Sagamihara City
・Leave your exterior wall painting in Aoba-ku, Sagamihara to Kakeru Koumuten Co., Ltd.!
・Leave your roof renovation in Aoba-ku, Sagamihara to Kakeru Koumuten Co., Ltd.!
・Leave your exterior renovation in Aoba-ku, Sagamihara 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 comparison estimates and key points!
・Top 12 solar power generation manufacturers! Introducing features and selection tips!
・What are the installation costs for solar power generation? Comprehensive tips to reduce costs!
・What are the best locations for installing solar power generation? Key points for selecting installation sites!
・Here for solar power generation estimates!
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!









