Are you wondering how much it costs to install solar panels for a 100m2 house? This is a question many homeowners ask themselves. Between the price of the equipment, possible aid and long-term profitability, there are quite a few things to understand. We will see together how to estimate the price of solar panels for a 100m2 house, what can influence the cost, and how you could even earn money with your installation. The idea is to give you all the keys to see things more clearly.

Key Points to Remember

• The price of solar panels for a 100m2 house depends on several elements, such as the size of the installation and the equipment chosen. You should always ask for several quotes to get a fair idea.
• Installing solar panels can be profitable. Whether you choose to consume your own electricity or resell it, there are ways to save money and even earn money.
• There are financial aids for the installation of solar panels. Find out about subsidies and tax benefits to reduce your initial investment.
• The power required for your 100m2 house is linked to your energy consumption. A good assessment of your needs allows you to choose the right number of panels.
• The choice between self-consumption and total resale has an impact on your budget. Understanding the advantages and disadvantages of each option helps you make the best decision for your project.

Understanding the price of a solar installation for a 100m2 house

More and more homeowners are looking to equip their homes with solar panels, a move motivated by the desire to reduce electricity bills and increase the value of their property. However, estimating the cost of this work can be complex. What budget should be planned for such an installation? What is the price of photovoltaic panels for a 100 m² house? Let’s try to clarify these questions.

Estimation of the initial cost of solar panels

The cost of a solar installation for a 100 m² house varies. It is difficult to give an exact price because it depends on several factors. Installing 3 kWp of solar panels does not imply the same budget as an 18 kWp installation. Moreover, for two installations of the same power, prices can vary considerably depending on the range of solar panels chosen and the prices charged by the installer. A turnkey installation, including material, installation and labour, generally costs between 400 and 700 euros per square metre.

Factors influencing the total cost of the installation

Several parameters influence the price of a solar installation for a house. In addition to the number of devices required, the cost depends on:

• The power of the solar panels: On average, the power of a solar panel is 300 Wp (Watt-peak), which is the maximum energy a panel can produce under optimal sunlight and positioning conditions. More powerful panels, from 375 to 400 Wp, are also available.
• The type of panel used: There are different types of solar panels, each with its own characteristics and price. Monocrystalline panels are generally more expensive than polycrystalline panels, but they offer better efficiency.
• The quality of the equipment: Choosing quality equipment is essential to ensure the durability and performance of the installation. A quality inverter, for example, is essential to convert the direct current produced by the panels into alternating current usable in the house.

It is important to note that prices that are too low should raise suspicion. Offers of solar panels for €1 or free are rarely reliable and may hide disguised consumer credit.

Importance of personalised quotes for an accurate estimate

To obtain an accurate estimate of the cost of a solar installation, it is essential to request personalised quotes from several installers. These quotes must take into account the specificities of your house, your energy needs and your equipment preferences. Carefully comparing the quotes will allow you to choose the offer best suited to your situation and avoid unpleasant surprises. Do not hesitate to request at least 3 quotes from qualified RGE installers for an accurate evaluation of your project.

Profitability of solar panels for a 100m2 house

Installing solar panels on your 100m2 house is a bit like planting a fruit tree: it requires an initial investment, but it can pay off big in the long run. Let’s break down together how to assess if it’s a good deal for you.

Calculation of potential income from a photovoltaic installation

To estimate the income you could get from your solar panels, you need to take several elements into account. First, the amount of electricity your installation will produce. This depends on the region where you live, the orientation and inclination of your roof to maximise the efficiency of solar panels, and the power of your panels. Then, you need to consider the price at which you will sell this electricity, either entirely to EDF, or in part if you choose self-consumption with resale of the surplus.

• Annual electricity production (kWh)
• Electricity purchase price (€/kWh)
• Self-consumption rate (in %)

It is important to note that income can vary from year to year depending on sunshine and electricity purchase prices.

Impact of self-consumption and resale on profitability

Self-consumption consists of directly consuming the electricity produced by your solar panels. It’s an excellent way to reduce your electricity bills. If you produce more than you consume, you can resell the surplus to EDF. This combination of self-consumption and resale can significantly improve the profitability of your installation. The choice between total self-consumption, total resale, or a mix of both depends on your energy needs and the purchase prices offered by EDF Obligation d’Achat. For a 100m2 house, you need to carefully evaluate the power of the solar panels to install.

Optimising return on investment

To optimise the return on investment of your solar panels, here are some avenues to explore:

1. Choose high-performance solar panels: Investing in quality panels, even if they are a little more expensive, can increase your electricity production and therefore your income.
2. Monitor your electricity consumption: Adopting more economical consumption habits can increase your self-consumption rate and reduce your bills.
3. Negotiate prices with installers: Obtaining several quotes and comparing prices can allow you to save money on the cost of the installation. Do not hesitate to ask for details on the guarantees and services included.

Financial aid available for the installation of solar panels

Installing solar panels represents a significant investment, but fortunately, various financial aids are available to lighten this burden. These schemes aim to encourage the energy transition and make solar energy more accessible. Let’s explore together the main aids you can benefit from.

Presentation of subsidies and aid schemes

The French State offers several aids to encourage the installation of solar panels. Among the most important are MaPrimeRénov’, financial aid paid by the National Housing Agency (ANAH). There are also local aids, which vary according to regions and municipalities. These aids can take the form of direct subsidies or tax exemptions. The self-consumption premium is also an interesting scheme, paid to individuals who consume their own solar electricity production. Finally, the sale of surplus electricity to EDF Obligation d’Achat allows for additional income generation.

Eligibility conditions for government aid

Each financial aid is subject to specific eligibility conditions. For MaPrimeRénov’, the criteria depend on household income and the ecological gain provided by the work. The installation must imperatively be carried out by an RGE (Recognised Guarantor of the Environment) certified professional to be eligible for aid. The self-consumption premium requires you to resell the surplus electricity produced. It is therefore essential to be well informed about the conditions of each aid before starting your project.

Tax advantages and VAT reductions

In addition to direct subsidies, tax advantages can reduce the cost of your solar installation. A reduced VAT rate of 10% is applicable for low-power installations (less than or equal to 3 kWp). This tax advantage significantly reduces the initial cost of the installation. Furthermore, some local authorities offer property tax exemptions for owners who carry out energy improvement work, including the installation of solar panels. Do not hesitate to inquire at your town hall to find out about the schemes in force in your municipality. The initial investment can be reduced thanks to the premium investment for self-consumption.

Determining the necessary power for a 100m2 house

It is essential to accurately assess the necessary power of a solar installation for a 100m2 house. This process involves a detailed analysis of your energy needs, the number of solar panels required, and your daily electricity consumption. A correct estimate will allow you to optimise your investment and maximise the benefits of solar energy.

Assessment of household energy needs

To determine the appropriate power, you must first assess your energy needs. This involves examining your electricity bills over a full year. Analyse your monthly and annual consumption to identify periods of high and low demand. Take into account the electrical appliances you use regularly, such as heating, air conditioning, lighting, and household appliances.

Here are some factors to consider:

• The size of your household and the number of occupants.
• Your consumption habits (hours spent at home, appliance use).
• The type of heating and hot water production (electric, gas, etc.).

A 100m² house generally requires a solar installation with a power of around 3 kWp, which represents approximately 8 solar panels. However, this estimate may vary depending on your actual consumption and the specificities of your home.

Calculation of the number of solar panels required

Once your energy needs have been assessed, you can calculate the number of solar panels required. This calculation depends on the power of each panel and the amount of solar energy available in your region. The necessary panel power is a determining factor. In general, it is estimated that a 100 m² house requires between 8 and 12 solar panels, but this figure may vary.

For an accurate calculation, you must consider:

• The nominal power of the solar panels (expressed in Watt-peak, Wp).
• The average sunshine in your region (hours of sunshine per day).
• The inclination and orientation of your roof.

Considerations on daily electricity consumption

It is crucial to analyse your daily electricity consumption to correctly size your solar installation. Identify the times of day when your consumption is highest. For example, if you use a lot of electricity in the evening, you will need to plan for a larger storage capacity (batteries) or opt for the resale of the surplus to EDF.

Here are some points to consider:

• Electrical appliances used during the day (computers, televisions, etc.).
• The use of energy-intensive appliances (air conditioning, electric heating, swimming pool).
• The possibility of shifting the consumption of certain appliances (programming the washing machine, dishwasher).

Key parameters influencing the price of solar panels

The price of solar panels is influenced by a multitude of factors. Understanding these parameters is essential to correctly assess the cost of an installation and optimise your investment. It’s not just about looking at the displayed price, but considering all the elements that contribute to the performance and durability of your solar system.

Influence of solar panel power

The power of solar panels, expressed in Watt-peak (Wp), is a determining factor in the price. Generally, the more powerful a panel, the higher its price. However, it is important to consider the quality/price ratio. More powerful panels can reduce the total number of panels needed to achieve the desired power, which can impact the overall cost of the installation. Panels with an average power of 300 Wp are common, but more powerful models reach 375 to 400 Wp.

Different types of panels and their impact on cost

There are mainly two types of solar panels: monocrystalline and polycrystalline. Monocrystalline panels are generally more expensive due to their higher efficiency and more uniform aesthetics. Polycrystalline panels, on the other hand, are often more affordable, but their efficiency is slightly lower. The choice between these two types will depend on your budget and space constraints. Opting for photovoltaic panels monocrystalline is often recommended for better efficiency.

Importance of the quality of chosen equipment

The quality of the equipment, including solar panels, inverter, and mounting system, plays a crucial role in the performance and durability of your installation. High-quality equipment may have a higher initial cost, but it generally offers better reliability, superior efficiency, and a longer lifespan. It is therefore important not to focus solely on the lowest price, but to prioritise quality for a profitable long-term investment. Beware of solar panels that are too cheap, as quality comes at a price.

Investing in quality equipment is a wise choice to guarantee the performance and longevity of your solar installation. Reliable equipment reduces the risk of breakdowns and optimises energy production in the long term.

Here are some elements to consider when choosing your equipment:

• The brand and reputation of the manufacturer
• Certifications and warranties offered
• Reviews and testimonials from other users
• Compatibility of the different system components

Choice between self-consumption and total resale of electricity

The choice between self-consumption and total resale of your solar electricity production is an important decision that depends on your energy needs and financial goals. It is important to understand the advantages and disadvantages of each option before making a decision.

Advantages and disadvantages of self-consumption

Self-consumption consists of directly consuming the electricity produced by your solar panels. Unconsumed energy can be resold. Here are some advantages and disadvantages:

• Reduction of your electricity bill: By consuming your own electricity, you reduce your dependence on the grid and lower your energy costs. A solar installation can cover a significant part of your needs.
• Additional income: The surplus electricity can be resold to EDF Obligation d’Achat (EDF OA) or another Local Distribution Company (ELD).
• Energy independence: You become less dependent on electricity price fluctuations.

However, self-consumption also has disadvantages:

• Higher initial investment: The installation of solar panels represents a significant initial cost.
• Consumption management: It is necessary to adapt your consumption to solar production periods to maximise self-consumption.

Terms of surplus resale to EDF Obligation d’Achat

If you opt for self-consumption with resale of the surplus, you can conclude a contract with EDF OA. This contract guarantees you a fixed purchase price for a determined period (generally 20 years). The purchase price is set by the Energy Regulatory Commission (CRE) and depends on the power of your installation. Currently, the purchase price is approximately €0.0761 per kilowatt-hour.

Strategies to maximise benefits

To maximise the benefits of your solar installation, here are some strategies:

• Optimise your consumption: Concentrate your energy consumption during daylight hours.
• Choose high-performance equipment: Opt for quality solar panels and an inverter to maximise electricity production.
• Monitor your production: Track your electricity production to detect any problems and optimise your installation. Note that total resale prevents you from benefiting from the self-consumption premium.

The choice between self-consumption and total resale depends on your financial goals and your consumption profile. If you consume a lot of electricity during the day, self-consumption may be more advantageous. If you consume little electricity, total resale may be more profitable.

Tips for choosing a qualified installer and avoiding scams

Selection criteria for an RGE certified professional

Choosing the right installer is essential to guarantee the success of your solar project. You must choose an RGE (Recognised Guarantor of the Environment) certified professional RGE certified installer. This certification attests to their expertise and compliance with current standards. An RGE installer is not only qualified to carry out a quality installation, but is also essential to benefit from state financial aid.

Here are some criteria to consider:

• Check the validity of their RGE certification with the certifying bodies.
• Ask for references of similar projects carried out by the installer.
• Ensure they have professional liability insurance.

Beware of overly attractive offers

Offers that are too good to be true often hide scams. Be particularly vigilant about aggressive canvassing and promises of unrealistic returns. Do not let yourself be influenced by pressure and take the time to compare several quotes.

It is recommended never to sign a contract at fairs or during door-to-door sales. If you sign a contract, you have a 14-day cooling-off period. Find out about fair solar installation prices to avoid overpaying.

Importance of a personalised feasibility study

A feasibility study is a crucial step before embarking on a solar project. It allows for a precise evaluation of your energy needs, the technical constraints of your roof, and the production potential of your installation. A serious installer will systematically offer you a personalised feasibility study before submitting a quote. This study must include:

1. An analysis of your electricity consumption.
2. An evaluation of the sunshine on your roof.
3. A proposal for sizing the installation.

It is advisable to request several quotes from different installers to compare offers and choose the one that best suits your needs and budget. Do not hesitate to ask questions and request clarifications on points that seem unclear to you. A transparent and available installer is a guarantee of seriousness.

Impact of solar installation on property value

The installation of solar panels represents an initial investment, but it can also have a significant impact on the value of your property. Let’s examine the different aspects of this influence.

Improvement of the energy performance of the dwelling

The installation of solar panels significantly improves the energy performance of a dwelling. A property classified A or B in the DPE (Energy Performance Certificate) is more attractive to potential buyers. This often results in an increase in property value. Homes equipped with solar panels are perceived as more modern and environmentally friendly, which can justify a higher selling price.

Increased attractiveness on the real estate market

Homes equipped with solar panels benefit from increased attractiveness on the real estate market. Buyers are increasingly sensitive to environmental issues and are looking for homes that allow them to reduce their carbon footprint and energy bills. A solar installation can therefore be a major selling point, accelerating the sales process and potentially increasing the final selling price. It’s a bit like having a hybrid car: it attracts attention.

Contribution to the green value of the property

The installation of solar panels contributes to the green value of the property. This value takes into account the environmental and sustainable aspects of a property. Buyers are willing to pay more for a house that incorporates green technologies and contributes to the reduction of greenhouse gas emissions. The presence of solar panels is a strong indicator of the owner’s commitment to sustainable development, which can result in a capital gain upon resale.

The precise impact on property value can vary depending on several factors, such as the region, the size of the solar installation, the age of the panels, and energy prices. However, generally speaking, the installation of solar panels is considered a profitable long-term investment, both financially and environmentally.

Here are some points to consider:

• The size of the solar installation must be adapted to the energy needs of the dwelling.
• Regular maintenance of solar panels is essential to maintain their performance and value.
• It is important to have a feasibility study carried out by a professional before installing solar panels, to ensure the profitability of the investment.

Maintenance and lifespan of solar panels

It is essential to consider the maintenance and lifespan of solar panels to ensure a profitable and sustainable investment. Regular maintenance and good management can extend the life of your installation and optimise its performance.

Tips for regular maintenance of installations

Regular maintenance is crucial to maintain the efficiency of your solar panels. Here are some practical tips:

• Panel cleaning: Dust, leaves, and other debris can reduce panel efficiency. It is recommended to clean them at least twice a year with water and a soft brush. Avoid abrasive products that could damage the surface.
• Visual inspection: Regularly check the condition of the panels, cables, and fixings. Look for signs of corrosion, cracks, or weather damage.
• Production monitoring: Carefully monitor the electricity production of your installation. A sudden or gradual drop may indicate a problem requiring intervention.

Regular maintenance allows for quick detection of problems and avoids costly long-term repairs. Do not hesitate to call on a professional for a thorough inspection.

Estimation of the longevity of photovoltaic equipment

The lifespan of solar panels is an important factor to consider when investing. Generally, solar panels have a performance guarantee of 25 to 30 years, meaning they should continue to produce at least 80% of their initial power during this period. However, the actual lifespan can be even longer with proper maintenance. It is also necessary to take into account the factors influencing the efficiency of photovoltaic panels.

• Solar panels: Generally guaranteed for 25-30 years, with a gradual degradation of performance.
• The solar inverter: A central component of the system, its lifespan is generally 8 to 12 years and requires replacement.
• Cables and connectors: They can last longer, but must be inspected regularly to avoid corrosion or disconnection problems.

Costs associated with maintenance and repairs

Although solar panels require little maintenance, it is important to budget for potential repairs and component replacement. Costs can vary depending on the complexity of the installation and the parts to be replaced. Here is an estimate of potential costs:

• Professional cleaning: Between €100 and €300 per intervention.
• Inverter replacement: Between €1,000 and €2,500.
• Cable or connector repair: Between €50 and €200 per intervention.

It is advisable to take out insurance to cover any damage caused by bad weather or unforeseen incidents. Appropriate insurance can protect you against unforeseen costs and ensure the sustainability of your investment.

Comparison of solar solutions for different surfaces

It is essential to understand that solar solutions are not universal. What works perfectly for a 100m² house may not be optimal for a different surface. Adaptation is the key word to guarantee the efficiency and profitability of your photovoltaic installation.

Specifics of installations for 100m2

For a 100m² house, the solar installation generally aims to cover a significant part, or even all, of the household’s electricity consumption. On average, such an installation requires approximately 10 to 14 solar panels, occupying a surface area of about 20m² on the roof. This configuration often allows for self-consumption, thus reducing dependence on the traditional electricity grid. It is important to accurately assess the energy needs specific to your household to correctly size the installation.

• Precise evaluation of annual electricity consumption.
• Choice of solar panels adapted to the available surface.
• Optimisation of the orientation and inclination of the panels.

Differences in cost and efficiency for varied surfaces

The cost and efficiency of a solar installation vary considerably depending on the surface area to be covered. For a smaller house, the initial investment will naturally be lower, but the potential savings on the electricity bill will also be reduced. Conversely, a large surface area will allow more panels to be installed, thus increasing electricity production and the potential for reselling the surplus. It is crucial to compare the different options and carry out a feasibility study to determine the most profitable solution for your situation. Don’t forget to consider the type of panel used, as this directly impacts efficiency.

Adaptation of projects to specific needs

Each solar installation project is unique and must be adapted to the specific needs of the household. Several factors must be taken into account, such as electricity consumption, available roof surface, roof orientation and inclination, and the available budget. It is strongly recommended to call on a qualified professional to carry out a personalised study and propose the solution best suited to your situation.

A thorough feasibility study is essential to guarantee the profitability and efficiency of your solar installation. It allows for the identification of technical and financial constraints, and the selection of the most suitable equipment for your needs.

Here is a simplified comparison table to illustrate the differences:

Conclusion

In summary, installing solar panels on a 100 m² house is an interesting project. The initial cost may seem significant, but you need to consider the available aid and the possibility of reselling electricity. To do things properly, it is important to ask for several quotes and choose a qualified installer. This allows you to have an installation adapted to your needs and to make the most of solar energy.

Frequently Asked Questions

What is the price for installing solar panels on a 100m² house?

The cost of a solar installation for a 100m² house varies greatly, generally between 7,000 and 22,000 euros. This price depends on the power of the panels, their number, and the brand. To get an accurate idea, you need to ask several professionals for quotes.

Is there financial aid for installing solar panels?

Yes, there are several aids. For example, the self-consumption premium is paid once, one year after installation. Its amount depends on the power of your system. You also need to sell part of your electricity to benefit from it. You can also resell the surplus electricity to EDF Obligation d’Achat, with tariffs that change every three months.

How many solar panels are needed for a 100m² house?

The number of panels mainly depends on how much electricity your house consumes. To find out, you need to look at the number of people in the house, how you heat water and cook, if you have electric heating, and how many electrical appliances you use.

What makes the price of solar panels vary?

The price of solar panels depends on several things. First, the power of the panels: the more powerful they are, the more expensive they are. Then, the type of panel (there are different ones, such as monocrystalline or polycrystalline). Finally, the quality of the chosen equipment also plays an important role.

Should I consume the electricity myself or resell it?

Self-consumption is when you use the electricity you produce. Resale is when you sell the electricity you don’t consume. The best choice depends on what you want to do and how much electricity your house uses. It’s good to think about these points to choose the most profitable solution.

How to choose your solar panel installer well?

Choose an installer who has RGE (Recognised Guarantor of the Environment) certification. Beware of offers that seem too good to be true, such as panels for 1 euro. Always ask for a detailed study of your project to be sure.

Do solar panels increase the value of my house?

Yes, a solar installation can increase the value of your house. It makes your home more energy-efficient, which is an asset for buyers. This contributes to what is called the « green value » of the property.

Do solar panels need maintenance and how long do they last?

You need to clean your panels from time to time so that they work well. They can last a very long time, often more than 20 years. You need to budget a small amount for maintenance and possible repairs.