How to estimate the performance and production of your future solar panels

Contact our solar experts At 09 71 07 07 40 (call not surcharged) of Monday At Friday of 9:00 am has 7:30 p.m. They You will accompany throughout your project and will help you design the most adapted to your needs and your budget !

How to calculate the production of your solar panels ?

Install photovoltaic solar panels on a roof allows produce of electricity. For this, it is to optimize their production and diminish installation in line with its consumption and his budget.

• THE Photovoltaic solar panels are devices allowing produce electricity from the sun’s rays.
• Amount of investment, installation, system power, etc. : many influential elements on the profitability a photovoltaic installation. This is particularly the case with the Electricity production of your solar panels.
• There electric power, indicated in kwc (kilowatt), corresponds to the maximum power guaranteed by your installation in best conditions.
• In this way, more there production (in kWh – kilowatt-hour) your installation is high, more your solar panels can produce electricity.
• For example, An installation of 3 kWc will produce around 3,200 kWh of electricity per year.

What is the production of solar panels ?

The power of a photovoltaic installation is measured in kilowatt (abridged in kwc)). This value corresponds to the maximum power of electrical production guaranteed by your photovoltaic device under optimal operating conditions.

In other words, the Watt-Rêête or The kilowatt-breaker indicates the maximum power capacity of your solar panels. However, this indication of measure would only be reached in optimal conditions solar energy production, namely:

There power-head therefore measure Maximum total power and give an idea of ​​the production installation in best conditions. However, in fact, the sun does not offer maximum irradiation (the days of bad weather or during the winter for example) and of course, its shelves are absent at night. In fact, the production is, therefore, less than power solar panels and is measured in kilowatt-hour (kWh)).

As we will see, the production varies depending on different criteria Like, among others:

Production of solar thermal panels

THE solar thermal panels also work thanks to thesolar energy. However, the latter produce heating and/or domestic hot water.

Their production is also measured in kWh. But this time it is about Measure thermal energy.

Become an electricity producer !

Produce your own renewable electricity, that tells you ? We put you in contact with a photovoltaic solar expert for free !

How to calculate the production of a solar installation ?

Others than the power and the yield of your photovoltaic modules, the parameters to be taken into account to establish the estimate of level of production of your solar panels are multiple and variable. Each of them has a direct influence on your production of photovoltaic electricity.

It is at thesolar installer that you choose to perform a Production estimate to determine if it is profitable or not to install solar panels on the roof of your accommodation.

The sunshine of your roof

Obviously, at first glance. We do not take great risk by associating thesunshine from a region to yield solar panels. And for good reason, 1 kWc of photovoltaic panels does not produce the same amount of electricity throughout France, but also according to the period of the year (yields are below winter).

Even if living in a very sunny region is a clear advantage in other less spoiled regions, the solar modules are (fortunately !) not reserved for residents of the southern third of France.

Besides, the Brittany currently enjoys a photovoltaic power to make the island of beauty pale: 415 MW were installed there against only 215 MW in Corsica (Park in the third quarter of 2022). Your geographic location should therefore not be a brake in your solar project !

If the installation is carried out by a RGE certified professional (Recognized guarantor of the environment), there is no reason why your project is not a success and that theamortization Solar panels are not there.

To estimate the Photovoltaic production capacity Solar modules installed on the roof of your accommodation, you can divide France into 4 large geographic areas, with different sunshine characteristics:

1. THE northeast ensures, on average, an annual production of 800 to 1,000 kWh/kwc ;
2. the diagonal starting from the Brittany in Haute-Savoie allows average production between 1,000 and 1,100 kWh/kwc ;
3. of Southwest to the northern part of the Auvergne-Rhône-Alpes region, Annual production is guaranteed between 1,100 and 1,200 kWh/kwc ;
4. THE south allows average production between 1,200 and 1,400 kWh/kwc.

So if you live in Marseille and that you plan to install solar panels Monocrystalline photovoltaic with a total power of 3 kWc, Your production will be, under optimal conditions, to:

1,300 kWh/kwc * 3 kwc = 3,900 kWh/year

For the same system of 9 kWc, Under the same conditions, you will produce 11,700 kWh/year.

Here are some data on estimates of Annual production photovoltaic installation of 3,6 And 9 kWc ::

Estimated annual production for 3 kWc

Estimated annual production for 6 kWc

Estimated annual production for 9 kWc

Between 2,400 and 3,000 kWh

Between 4,800 and 6,000 kWh

Between 7,200 and 9,000 kWh

Between 3,600 and 4,200 kWh

Between 7,200 and 8,400 kWh

Between 10,800 and 12,600 kWh

Between 3,000 and 3,300 kWh

Between 6,000 and 6,600 kWh

Between 9,000 and 9,900 kWh

Between 3,300 and 3,600 kWh

Between 6,600 and 7,200 kWh

Between 9,900 and 10,800 kWh

Average electricity production estimate for 1 m² of photovoltaic solar panels

In France, a PV installation of a power of 1 kWc can produce between 800 and 1,400 kWh/year. For an installation of 3 kWc, this corresponds to the installation of 8 solar panels, with an annual production estimated between 2,400 and 4,200 kWh/year.

The average surface of a solar panel being 1.8 m², we can estimate solar production per m² by dividing annual production by the total area. Thus, the solar production per m² of a 3 kWc installation would be about 166 to 291 kWh/year.

Orientation and inclination of the roof

Obviously, and as a previously stated, a full -based roof south is an ideal situation for Maximize your yields solar. However, know that you can get a completely acceptable production if your roof is oriented ::

Attention, All facilities in the north are to be avoided.

In a second step, as shown in the table below, thetilt optimal for your solar panels is 30 °. However, all the roofs do not offer the possibility of installing solar panels at this angle.

However, it is possible to install supports And fixations For to optimise there productivity of the system by approaching as much as possible from an angle of 30 °. Finally, depending on the orientation which is possible in your home, the level of return can vary.

100 %

Depending on the inclination and orientation of your solar panels, you should weigh Optimal production.

Thus, for our Marseille installation of 3 kWc (3,900 kWh/year) exposed to the east, has 45 °, The yields will be:

3,900 kWh * 84 % = 3,276 kWh/year

An installation with similar characteristics of 9 kWc (12,150 kWh/year) will produce: 12,150 kWh * 84 % = 9,828 kWh/year.

Cleaning solar panels

Even if Solar modules se naturally clean thanks, among other things, to the runoff of the rain, It is recommended to perform a cleaning at theclear water Using a telescopic broom at the rate ofonce a year minimum. If it is not possible for you to clean your modules, you can call a professional.

It is estimated that an excessive accumulation of dust, pollution, foliage, etc. On a module can do Reduce your production by 5 to 15 %.

The temperature of solar panels

There temperature also has a impact on yield and production of your solar panels. The crest power of an installation is estimated from the principle that the solar modules are at 25 ° C. Please note, these are the temperature of the panels and not of the ambient air.

If the actual temperature of a panel is higher than this value, it will be, in the estimation of your production, of subtract 0.4 % per additional degree, And this is a sign polycrystalline Or monocrystalline.

If we take up our example which includes the characteristics that we know for a temperature of 27 ° C ::

• an installation of 3 kWc will produce: (0.4 % * 2) * 3,900 kWh = 3,120 kWh/year ;
• for an installation of 9 kWc, The estimated production will be: (0.4 % * 2) * 12 150 kWh = 9,700 kWh/year.

You want to know the potential of your accommodation ?

Contact our solar experts At 09 71 07 07 40 (call not surcharged) of Monday At Friday of 9:00 am has 7:30 p.m. They You will accompany throughout your project and will help you design the most adapted to your needs and your budget !

The technology used for your solar panels

There are currently three different types of photovoltaic technology ::

1. THE silicon, The most common Today ;
2. the so -called “technologythin layersWhere photovoltaic cells are also produced from silicon but in layers extremely fine ;
3. sectors under development like the organic sector.

More than 90 % of solar panels sold worldwide are mainly composed of silicon And today there are three ways to exploit this semiconductor.

Depending on the one you choose, the production of your solar panels will be higher or lower. But your choice will also have an impact on the cost photovoltaic installation. So choose Good technology for your solar panels is essential If you want to maximize your photovoltaic electricity production:

• Monocrystalline solar panel : it is made from a pure silicon and is only composed ofonly one crystal. Solar panels that use this process are slightly more expensive than others that employ a different technology, but Monocrystalline photovoltaic cells have high yields, being able to 18 to 24 %. So these are best solar modules;
• Polycrystalline solar panel (or multicristalline): made from Monocrystalline silicon falls, Polycrytalline solar modules are cheaper to be produced but they do not benefit from an efficiency as high as that produced by monocrystalline cells. The ability of yield Polycristalline solar panels varies between 14 and 18 % ;
• Amorphous solar panel : inexpensive in manufacturing and producing only low yields, Photovoltaic cells made with Amorphic silicon are endangered. Those still on sale on the market can hardly guarantee you more than a yield of 5 to 7 %.

Take care of the solar panels you are going to make because their efficiency conditions the return on investment of your project. Some fraudulent installers do not hesitate to offer Cheap solar panels In order to bait customers.

Make sure that the modules offered to you are reliable by consulting the manufacturer’s website for example or by asking for theOpinion of several solar installers.

The production of solar panels remain the same over time ?

The answer is No ! Over time, the production and the yields of a solar panel decrease. This is due to theopacification of glass covering photovoltaic cells.

Every year, a photovoltaic installation lose thus between 0.5 and 1 % efficient on average. After 25 years of operation, the manufacturers guarantee therefore an installation operating at About 80 % of its initial capacities.

Even if the installation is a little less profitable each year, the electricity produced makes it possible to Reduce your energy bill throughout the lifespan of the panels, in self -consumption total (with or without domestic or virtual solar battery) or with Sale of surplus. Note that well -maintained solar modules can operate for almost 30 years.

What to remember on the production of photovoltaic solar panels

There are many internal factors And external (System losses, type of inverter or microphone, fouling, nominal power and yield, etc.) Who influential on the Production capacities of your solar panels. To this extent, there are not two comparable installations, as they are singular, like the different needs households that order it.

Get closer one of our solar experts who will assist you in theEstimate of your photovoltaic production Depending on the criteria to you. So you can make beautiful energy savings !

Optimize the production of a solar installation

As we have seen, several elements will influence the level of production of a solar installation. For Do not impact profitability From your photovoltaic system, we have selected you points the most important to take into account at the time of Signature of your quote And throughout the lifespan of your installation:

1. there roof must not present No shadow zone ;
2. a orientation most south must be privileged;
3. solar panels must present a degree of inclination getting closer to 30 ° ;
4. the installation must be regularly controlled For restrict THE losses of power linked todirtying modules;
5. contact a professional as soon as Sudden yield losses And unexplained.

Your solar installation at the best price !

Our advisers support you for free to find the installation that most corresponds to your budget and your needs !

FAQ: your questions about solar panel production

What is the production of a solar installation in France ?

France, by its temperate climate, enjoys a high photovoltaic potential. Indeed, in many regions, the sun is a large part of the year. Marseille , for example, benefits from 2,870 hours of sunshine per year And Paris of 2,080 hours.

What feed solar panels and ensure a high production level throughout the year. Of course, according to the season and the geographical area, there production solar panels varied.

THE South of France allows, on average, production between 1,200 and 1,400 kWh/kwc/year when the northeast of the country has an average production of 800 to 1,000 kWh/kwc annual.

How to optimize the production of my solar panels ?

The first thing to do if you plan to Place solar panels on your roof is to make sure you benefit from good conditions (sunshine, orientation And tilt) In terms of your roof. Once you know (roughly, you are not an expert !) how your house is located, it is important to orient yourself towards a specialist of the solar panels.

For this, the best thing is to go through the Hello Watt online quote simulation. By entering a few information On your house, you will have an idea of ​​the viability of your project, of his price and its profitability.

Contact without waiting for one of our experts of solar, he will be able to to study your project and small bonus, plan your installation with a RGE certified craftsman (Recognized guarantor of the environment) of our network Selected according to a drastic specifications.

It is simple, fast and more free ! An installation that has been the subject of a feasibility study will display Optimum production levels.

How much will cost me the laying of solar panels ?

On average, the price of yours solar panels, for an installation of 3 kwc turnkey, will revolve around € 8,000, Depending on the type of module used and the difficulty linked to the work.

The price of your solar panels may vary according to several elements. Your region, there Size of your installation, THE consumption type that you are going to do, as well as the Choice of installer and equipment used, are just as many elements that influence the cost of your project.

In the past, there has been a lot ofSolar panels scams And the prices charged were sometimes exorbitant ! Rest assured, the sector has since structured and the French government has set up certain aid exclusively reserved for individuals who choose quality installers (premium for self-consumption and purchase obligation).

The latter must have the certifications in force such as RGE LABELS And Qualipv. A guarantee of quality that we valorize at Hello Watt. This is why if you go through our Solar quote simulator in line, We will direct you to a Partner installer experimented, which has all certifications in force.

What should I be careful by placing my solar panels ?

You are convinced by solar panels ? U.S. too ! Now you want Install photovoltaic modules on your roof, It is important to contact the right people so that your installation displays a Optimal production level !

Of the’expert Solar that goes to estimate there viability of your project, to Choice of the right installer solar panels for laid as well as maintenance From your modules, nothing should be left to chance !

At the house of Hello Watt, We like transparency, that’s why we propose to be the relay between individuals and installers, In order to ensure the good proceedings installation of your solar panels.

Ask all your questions to our solar experts, they will be able to provide you with informed answers and guide you throughout your project ! Do not hesitate and join them for free 09 71 07 07 40 for benefit from a Complete and personalized support.

How to estimate the performance and production of your future solar panels

Photovoltaics is certainly the most accessible renewable energy, financially and technologically, to the general public. However, it conveys a lot of fantasies and sometimes is noticed. To help you see more clearly, we invite you to understand and calculate the energy performance of your photovoltaic project.

Despite the return to grace of nuclear, renewable energies are not to be rebuilt, far from there. And in this area, photovoltaics is certainly the energy most accessible to the general public. However, behind the flattering figures of the energy capabilities of solar panels hide a slightly more complex reality. Let’s clear all of this a little so that you can make a quick estimate of the energy efficiency of your future solar panels.

What are the elements that influence the effectiveness of a solar panel ?

Solar panels are surfaces that will convert solar energy to electricity. There are several technologies of photovoltaic panels with different yields. Two dominate the market:

• Monocrystalline silicon panels, dark in color: they offer an average yield of 18 % to 19 %;
• Those in polycrystalline silicon, blue in color: their average yield is less effective (12 to 15 %), but they are less expensive for purchase.

The technology of your future solar panels is therefore the first element that will play on your electricity production. But this is not the last and many other parameters come to influence it.

Each panel has a Maximum power (PMAX on the technical sheets) which is expressed in watt ridge. It corresponds to the maximum electricity production that a solar panel can generate under conditions ” optimal ” which are :

• The level of sunshine where the panels will be installed and which is measured in watts/m². Optimal sunshine is 1000 watts/m², which corresponds to a bright sun, at noon and without an ounce of clouds.

• An external temperature of 25 ° is considered optimal, but it is not so simple. If the solar panel does not have sufficient ventilation at the rear, it can quickly ” heat »». Which will reduce its performance in a significant way. Paradoxically, you can therefore end up with more significant energy efficiency in winter than in a orient.
• The inclination of the panels is another essential point, which must be adapted according to the latitude of solar panels. To simplify, an optimal inclination in the southeast of 30 °, 40 ° in the North and approximately 35 ° in the center of France.
• Finally, you can have the best panels in the world, the best sunshine, if you place your solar panels in a shade area, you might as well do it.

Be careful, without meeting all these conditions, the installation of solar panel remains interesting. It will especially be two to three times faster to make profitable on the French Riviera than in Dunkirk.

How to estimate the production of its solar panels

Your electricity production depends on the yield of your solar panels, their surface and finally the solar power received. The latter varies according to your latitude and the number of hours of sunshine per year. France can be divided into four zones:

• North of France and Paris region with 1400 to 1600 hours of sun per year;
• Centers regions with 1600 to 2000 hours of sun per year;
• The southwest with 2000 to 2400 hours of sun per year;
• Finally, PACA and Corsica regions with 2400 to 3000 hours of sun per year.

Interesting figures, but which are not very enlightening if you do not know the solar power received in its residential area. The card below allows you to get an idea of ​​the photovoltaic energy potential of your department.

However, for the future energy producer you are, what interests us most is the average production level in your region.

• THE watt (w) is the unit of measurement of energy power.
• THE Watt Time (WH) is the measurement unit used to indicate the amount of energy produced by panels in an hour.
• The crest power is the power of the photovoltaic modules expressed in Watt ridge (WC). This is the maximum power that the solar panel will produce under optimal conditions.

What interests you most is above all solar production yield, which corresponds to electricity production (which is expressed in WH), per month or per year for 1 watt crest (WC) installed. This KWH product/kwc ratio is therefore expressed in WH/WC and it emerges for France four major production zones.

• Zone 1: We mainly have the DOM-TOM with a solar yield of 1418 Wh/WC.
• Zone 2: The second zone of France most favorable to the installation of photovoltaic panels brings together the Provence-Alpes-Côte d’Azur regions, Corsica or Occitania with yields of around 1150 WH/WC, 1148 Wh /WC and 1145 Wh/WC.
• Zone 3: It includes the central regions of France, with an annual solar return ranging from 1095 and 1115 Wh/WC.
• Zone 4: This zone brings together the northern regions (Île-de-France Include), the far west and the east of France. Their solar yield is between 1007 and 1081 Wh/WC.

Here is a small table for each region of France:

Regions	Middle month returning past	Yield of 12 previous months
Auvergne-Rhone-Alpes	94 Wh/WC
Burgundy-Franche-Comté	100 Wh/WC	1063 Wh/WC
Brittany	112 Wh/WC	1055 Wh/WC
Center-Val-de-Loire	105 Wh/WC	1038 Wh/WC
Corsica	1094 Wh/WC
DOM TOM	1436 Wh/WC
Great-east	95 Wh/WC	1041 Wh/WC
Haut-de-France	94 Wh/WC	979 Wh/WC
Ile-de-France	95 Wh/WC	978 Wh/WC
Normandy	110 Wh/WC	1026 Wh/WC
New Aquitaine	116 Wh/WC	1122 Wh/WC
Occitania	114 Wh/WC	1167 Wh/WC
Pays de la Loire	110 Wh/WC	1096 Wh/WC
Provence-Alpes-Côte Azur	132 Wh/WC	1266 Wh/WC

Now that you have this information, it becomes easier to estimate the production of an installation. So, if you plan a 3 kWc installation and live in Brittany, you will produce around:

KWH product/kwc ratio (1.055 kWh/kwc) x Installed peak power (3 kwc) = 3,165 kWh/year.

Many tools make it possible to simplify your estimates. We have selected two from associations dedicated to the promotion of photovoltaics:

Now you have all the tools to better understand the ins and outs of photovoltaic energy production. You can get a more precise idea of ​​the production that your future installation of solar panels can generate.

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