FAQ

Installing solar panels is a process with many choices and possibilities. We have gathered some of the most common questions and answers below. You can also download our FAQ as a PDF.

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The electricity that you produce but do not use is sent to the electricity grid. Your energy company will later pay you for this electricity. In addition, all micro-producers are allowed a tax reduction of an additional SEK 0.60 per kWh on all excess electricity, which will be printed on your annual income declaration. You also get electricity certificates on the electricity sold because it is renewable and a utility benefit when it is produced locally and thus reduces the energy losses in the nearby grid.

The tax reduction applies to all producers who have a 100A fuse or less, and to all electricity that sells up to their own consumption. For example, if you produces 11,000 kWh but only consumes 10,000 kWh for a given year, you are entitled to a tax reduction of 10,000 * 0.6 = SEK 6,000.

How much electricity you get from the system depends on a number of factors and therefore a clear answer can rarely be given. Generally, between 17-20% of the incoming solar energy is converted into electricity. Usually the amount of electricity, ie the number of kWh, is produced per installed kW. This figure usually ranges from 800 - 1100 kWh / kW, mainly due to the annual solar radiation and the direction and inclination of the panels. Other factors affecting production are shading, temperature, snow cover, soiling etc.
Read more about how much electricity solar panels produce

Since the sun is lower during the winter season, the angle of incidence becomes less beneficial, which means that energy production naturally becomes somewhat smaller, but if you want the system to generate as much as possible, the panels must be kept snow-free. Snow up to about a centimeter deep can still be penetrated with sunlight. Furthermore, if the panels are mounted at the right angle, thicker layers of snow will gladly slip off, especially in thunderstorms. We therefore do not recommend that you get up on the roof with the fall risk it involves to remove the snow yourself.
Read more about how solar panels work during winter

Normally, planning permission are not required as long as the solar modules are placed directly on the roof and in the same slope. Many counties follow the following principles:

    planning permission
  • Planning permission are not needed when the solar panels are close to the roof of one- and two-dwelling houses.
  • If, on the other hand, you put the solar panels on a scaffolding then planning permission are required.
  • Larger panels or panels of culturally valuable buildings also require planning permission.

Read more about planning permission and solar panels

Contact us, we will help to check if building permits are required for you

Clean roof areas without shade that are facing south with a slope of around 40 degrees is optimal conditions. With a southwestern or southeastern direction, about 6 percent of annual production is lost and a slope of 40 degrees ± 10 degrees gives about 2 percent lower production. Thus, installation of solar panels can be profitable even if the optimum conditions are not met. Feel free to contact us for a free consultation!

At SVEA, we take care of the whole process for you as a customer. After a consultation with one of our technicians, we design a customized system for your villa. We then handle applications for the necessary permits and then install the facility with our own trained staff. We make it easy for you as a customer and with us you get a contact point that you can always contact to get answers to any questions.

To ensure your safety when purchasing solar panels, we only work with large and well-known suppliers with the highest quality products. Should something against all presumption not work properly, all our products have long warranty periods. The product guarantees on the various parts are as follows:

  • Solar panels 10 years
  • Optimizer 25 years
  • Inverter (from SolarEdge) 12 years
  • Inverter (from Fronius) 5 years
  • Mounting system 10 years

In addition, there is a 25-year 80-percent power guarantee on the solar panels and we provide a 5-year guarantee on the work issued.

We connect our facilities to three-phase.

Electricity certificates are a support system for increasing the expansion of renewable energy in society. It works by granting renewable energy producers electricity certificates, while non-renewable energy producers must buy electricity certificates to cover their production of "unclean electricity". This creates a market where the price of the electricity certificates varies with supply and demand. As a rule the price is usually around 10 öre / kWh. The electricity certificates can be obtained in 15 years from commissioning.

In a conventional solar panel plant, electricity certificates can only be obtained for the excess electricity that is discharged on the electricity grid, since it is only the electricity that passes the house's electricity meter and is registered. We have therefore developed our own meter that reports all the data from the solar plant to us and we can therefore give you electricity certificates for the entire production. We also take care of selling the electricity certificates for you so that the only thing you as a customer notice is that once a year extra money comes into your account. We can therefore include this in our solar panel packages and thus give you about 10 öre / kWh extra for all electricity your plant produces.

Read more in detail about electricity certificates

Solar panels are sensitive to shadows because solar panels in a traditional plant are connected in series. There, the weakest link always restricts all other solar panels in that loop. To avoid this sensitivity, we use so-called “smart solar panels” in most of our installations where the units are connected in parallel and thus do not limit each other. If you have shade on the roof, you can still get a good production with a well-dimensioned plant.

Solar collectors convert the sun's energy into hot water, while solar panels convert the energy into electricity. We at SVEA Solar have chosen to focus only on solar panels. A major advantage of solar panels is that it can be combined with other energy sources, such as geothermal heat. Similar solutions are more difficult with solar collectors.

The government has allocated funds to support the expansion of solar panels. The grant is for a maximum of 20% of the investment cost for companies and individuals. The grant is valid as long as the money allocated is sufficient. There is already a long queue of applications and therefore one cannot expect to be able to receive grants this year, depending on which county you live in. The conditions for the grant are as follows:

  • The grant applies to all types of grid connected solar panel systems
  • The grant is for a maximum of 20% of the installation (both material and work) for companies and the application must be submitted before ordering the plant
  • The grant is for a maximum of 20% of the installation (both material and work) for private individuals and the application can be submitted up to 6 months after the installation is completed.
  • A maximum of SEK 1.2 million is paid per system and property
  • The grant is for a maximum of 20% of the installation (both material and work) for private individuals and the application can be submitted up to 6 months after the installation is completed.

The part of the installation cost which consists of labor costs, is deductible on ROT deductions, which is a tax reduction for half the labor cost up to a maximum of SEK 50,000 per person per year.

In recent years, the Government has made inquiries about how grants can be directed to increase the proportion of self-employed producers in Sweden. A key issue in this discussion has been how to handle the part of the self-generated electricity that is output on the grid, which is not used in the own household. The question of "grid fee", ie. the fact that electricity is offset against purchased electricity has got the thumbs down in these investigations. Instead, a tax reduction of SEK 0.60 per kilowatt hour has started to apply to microprocessors from 1 January 2015. The grant is valid for a maximum of 30,000 kWh / year.

In appearance, it is quite easy to distinguish between these different types of panels since polycrystalline solar panels are often blue-speckled while monocrystalline are generally uniformly black. The difference from a technical point of view is that the polycrystalline solar panel consists of several crystals while the monocrystalline consists of only one crystal. The production of monocrystalline is somewhat more advanced and the price of these panels is therefore usually slightly higher. However, the higher price is generally offset by a higher efficiency against the polycrystalline panels.

How much electricity you get from the system depends on a variety of circumstances and therefore a clear answer can rarely be given. Generally, between 17-20% of the incoming solar energy is converted into electricity. It is usually stated how much electricity, ie the number of kilowatt-hours, produced per installed kW. This figure usually ranges from 800 - 1100 kWh / kW, mainly due to the annual solar radiation and the direction and inclination of the panels. Factors affecting annual production are as follows:

  • Solar radiation - The average solar radiation in Sweden is estimated at 1060 kWh / m² per year. SMHI has produced solar radiation maps where you can get a picture of what the conditions look like where you live.
  • Direction of the panels - Preferably facing south.
  • Slope of the panels - The optimal slope of the panels varies slightly with the seasons and how high the sun is then in the sky. In Sweden, an angle of between 35-50 degrees is recommended during the summer months when the panels generate the most electricity.
  • Shade - Shadows from surrounding objects limit the power of the systems.
  • Temperature - The solar panels have a higher power at lower temperatures. This is one reason why solar panels are so efficient in Sweden, despite our northern location, because the panels do not get as hot as they get at southern latitudes where the temperature is higher.
  • Snow cover - As the panels are snow covered, they do not produce electricity. This may bring down the annual production somewhat, but with a good slope on the panels, the snow slides off by itself. The loss of snow-covered panels during the winter is not as great as one might think, as the number of hours of sunshine is low.
  • Dirt - As the panels are covered by various objects such as leaves, pollen, air pollution, etc. reduces their efficiency. In Sweden, however, we have such clean air that this fact is a minor problem and rain and snowmelt provide natural cleaning.

Simply put, the following formula can be used to calculate production:

Installed power (kW) * Number of standard solar hours / year (kWh / m²) * Power depending on location and orientation (%) * Power loss in cables and inverters (%) = Annual production

Exemple:

A system of 10kW with installed power 1000kWh / m² in solar radiation, 90% power depending on location and orientation and 3% power loss in cables and inverters. 10kW * 1000kWh / m² * 0.9 * 0.97 = 8730 kWh / year

Today, it is not as profitable to get electricity out on the grid as to use the electricity yourself. When using the electricity yourself, the calculation is simple, since consumed electricity can be multiplied by the price per kilowatt hour.

Example:

A 3000 W system with production of 1000 kWh / kW gives a production of 3 x 1000 = 3000 kWh. With an electricity price of SEK 1.2 per kilowatt hour, this corresponds to a saving of 3000 x 1.2 = SEK 3600

If electricity is not used but is placed on the electricity grid, the bill becomes a bit more complicated. At present, the network owner is obliged to buy the electricity that is supplied at Norpool's spot price, which varies somewhat depending on supply and demand, but usually is around SEK 0.30 to 0.40 per kilowatt hour. In addition, as a producer of renewable energy, you are entitled to apply for and sell electricity certificates and can additionally be entitled to a tax reduction of SEK 0.60 per kWh. Electricity certificates are applied for from the Swedish Energy Agency and, depending on the variable price, this gives an additional SEK 0.10 per kilowatt-hour input.  

The systems that we sell here at SVEA Solar are connected to the electricity grid. For you as a private consumer, this means that the electricity that is not used is automatically output to the electricity grid and can thus be consumed by eg. your neighbors. Before the electricity is discharged on the mains, it passes the electricity meter in your house, which measures how much you supply on the grid. If your electricity meter is unable to measure outgoing electricity, the network owner is obliged to replace it without charge in connection with your installation of the solar panels. However, in order to sell electricity, you must consume more electricity in total for a year than you sell to the grid.

Exemple:

The company that is a network owner is today obliged to receive the electricity that is supplied but has no obligation to pay for it. Therefore, it is important that you choose an electricity trading company that gives a reasonable payment for your excess energy. Talk to us and we can give tips on companies that have good conditions. Generally, electricity trading companies pay around Nordpool's spot price for your excess energy. The spot price is the price for which electricity companies trade electricity from one another and thus it is determined by supply and demand, but usually it is around 0.3 to 0.4 SEK per kilowatt hour. However, some companies pay better and it is possible to get more than SEK 1 per kilowatt hour if you choose an electricity trading company that pays well - ask us and we will tell you more.

In addition to being paid by the electricity company that you choose to sell the electricity to, you also receive as a micro-producer a tax reduction of SEK 0.60 and electricity certificates of about SEK 0.10 (if an electricity certificate meter is included in your facility). In addition, your network owner pays out so-called "grid utility" of about SEK 0.10 per kWh for the excess energy.

In connection with your installation of the solar panels, your network owner is obliged to switch your electricity meter free of charge to one that can measure electricity in both directions. Just as your electricity trading company reads the electricity meter to know how much electricity you have purchased, the company also reads how much electricity you have used. This electricity they buy from you according to the terms of the subscription and information on how much you have made out on the grid will therefore be on your invoices from the electricity company.

To know how much electricity your system generates overall, ie not only the one you input into the electricity grid but also the one you use yourself in the household, you can easily read your inverter or alternatively through your computer / mobile / tablet.

If you want to be able to see information directly in your mobile / computer about how much you use yourself and how much you sell to the grid, a separate "smart meter" must be installed. The smart meter is not included in the standard packages, but can be selected as an additional product.

As the production of electricity through a solar panel system varies with how the sun rays, the production varies as well. Therefore, a solar panel system should be considered as a complement to your existing energy supply. If you want to become fully self-sufficient on solar, batteries need to be installed to the system in order to be able to store the electricity for those moments when the sun does not shine. At SVEA Solar, we do not currently sell battery packs to our systems, as the economics of these batteries are not favorable with today's battery prices.

The size of the photovoltaic packages is usually set at the maximum voltage that the system can generate at a given time. In other words, if you buy a 3,000W system, you can at most get 3,000W at a given time. Such a system of 3,000W generates around 3,000 kWh per year, depending on where in the country it is installed. See the solar map for an idea of ​​your conditions. The size of the system that suits you depends on how much electricity you consume, but also how the conditions look where you intend to set up the system. Since the solar panels can usually absorb between 17-20% of the solar energy that radiates, an area of ​​about 7 times is required. as large as the specified kilowatt number on the system (1/7 = 0.14). Thus, for a system of 3,000W, an area of ​​about 21 m² (3 x 7 = 21) is required.

For a system of 3,000 W, the household should consume at least 5,000 kWh per year. Since the solar panels require so much surface area per kilowatt produced, the systems are usually dimensioned according to the conditions that apply to the roof surface. Talk to us and we will help you find the right solution for you! For larger systems, the fuse level must also be taken into account when designing the plant. Not infrequently, larger properties have an available roof surface that allows for a larger facility than can be connected at the current level of hedging. Calculation of how large a system that can be connected at a certain fuse level can be obtained by the following formula: Fuse level * 230V * 3 = Highest possible output power in the system. For example, at a fuse level of 63A, 63 * 230 * 3 = 43.5kW.

When designing, account must also be taken of the amount of consumption on the current subscription. If an over-sized plant is installed in relation to consumption, there is a risk that it will not be classified as a micro-producer and therefore not be able to offset the tax reduction of 60 öre / kWh on the excess energy.

Solar panel prices has heavily decreased in recent years as a result of the growing volume of solar panels produced around the world. A plant varies in price depending on the size of the system.

For a villa there is a typical plant with installation of about SEK 16-17 / kW (including VAT). This means that a plant of, for example, 30 solar panels (which corresponds to 50 sqm) with a power of 295W per panel costs 16 * 30 * 295 = 141,600 SEK.

A solar panel installation increases the market value of a villa. Studies from the US have shown that the value increase is in the same order of magnitude as the investment cost of the solar panel plant. Although there is a lack of similar studies in the Swedish market, there are no obvious reasons to believe that solar panels would not increase the value of houses on the Swedish residential market. However, in a Swedish opinion poll, 71% of respondents stated that they are prepared to pay more for a house with solar panels.

The word network utility sometimes pops up when you talk about solar panels. Network utility simply means offloading the power grid when producing your own electricity locally. The electricity you sell on the electricity grid will go to your neighbors. This means that the network owner does not have to transport other electricity far away to your neighbors. Their transmission costs are thus reduced. For that, you will be compensated a few öre per kWh for the electricity you sell on the grid.

This is an issue that is important to us at SVEA Solar and which we see is crucial for a healthy solar panel market in Sweden. The answer is no, anyone should not install solar panels. As soon as a solar panel is hit by sunlight, it starts producing electricity. When the solar panels are then connected together, high voltages arise which are dangerous to work with without proper training. Therefore, solar panel installations in Sweden must be installed by trained personnel and by a company that has official electrical degrees amongst it's employees. This is something that many of today's installers do not have, which means that their installations are not covered by insurance and thus they are not installed correctly. All companies installing solar panels must have a self-inspection program registered with the Swedish Electric Safety Authority. You as a customer can check this out by going to the Swedish Electricity Safety Agency and clicking on ”Check the electricity provider”.

We are happy to help and answer your questions regarding solar energy. Fill in the form below and we will contact you as soon as we can, or call us on 08 - 28 66 93.

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