Private Homes

Is my house suitable for installing solar panels?

As long as you live in a private home and have a roof, you are suitable for an installation. In the case of residing in a multi-family dwelling, it would also be possible to carry out a shared self-consumption facility provided that most of the owners agree.

With our calculator, you will be able to perform a simulation to see the number of solar panels that could be installed in your residence as well as to know the monthly savings you could achieve.

Is energy produced at night? What happens if I consume at night?

No, at night no energy is produced, since the panels work by converting solar energy into electricity, for which the presence of the sun is needed.

You can always consume the energy from your conventional electrical network in those moments when you are not producing and sell the energy that is left over during the day.

Small changes in your daily routine (eg scheduling the dishwasher to run during the day) can achieve major savings improvements.

Is power still being produced in bad weather?

Yes, it is true that their efficiency decreases if the sun's rays do not affect them directly, but they will still continue to produce energy during rainy or cloudy days.

Is a solar installation profitable right now? When will I get the investment back?

Solar energy is currently the cheapest energy available in Spain. Although the initial investment may seem relevant, we must remember that the installation has a useful life of more than 25 years.

Taking into account the aid to which you can aspire, in a period of 4 to 7 years you will have already recovered the initial investment.

How much can I save by installing solar panels?

Get savings of up to 70% on your electricity bill from the first day!

Use our savings calculator to find out in detail how much you can save each month.

Can I take advantage of a subsidy for the installation of solar panels?

Yes, depending on your community and City Council, you can get a discount both in the IBI of your home, of up to 50% for about 3 - 5 years, and in the ICIO for homes that install photovoltaic systems.

Contact us and let us take care of everything. From Luzentum we will help you find the grants to which you can aspire.

How long does it take to complete an installation?

Once the building permits have been obtained from the City Council (this time varies depending on the City Council), the process can take 1 - 2 days.

How can I check my consumption?

You can check your home's consumption directly on your electricity bills.

If in doubt, do not hesitate to contact us.

How can I find out which installation best suits my needs?

The ideal installation will be the one that adjusts to your consumption level and the available area on your roof, taking into account the solar radiation in the area.

You can perform a simulation with our solar calculator with which you will solve all your doubts.

Is my home at risk during the installation process?

The installation of photovoltaic panels on the roof of your home is a very simple process that lasts just 1 - 2 days, with minimal impact on the interior of the home.

What happens if I produce more energy than I consume?

Within self-consumption facilities, the regulation contemplates what is known as "simplified compensation of surpluses". This allows you to obtain a small financial compensation at the end of the month for all the energy that you do not consume and return to the grid.

The price at which you sell the energy will depend on the agreement you reach with your marketer.

This additional income allows you to further increase the profitability of the investment and shorten the payback time.


Types of connectors for electric vehicles

There is a wide variety of types of connectors for the electric vehicle, which will vary depending on the choice of the manufacturer. For electric cars, the most common are the so-called Type 1 and Type 2 connectors.

Type 1, also known as SAE J1772, is the most widely used connector worldwide and has achieved great relevance in the American and Asian markets.

On the other hand, the Type 2 connector, also called Mennekes or IEC 62196, is the one commonly used at a European level and towards which trends are tending worldwide. For electric motorcycles, manufacturers tend to opt for the Schuko connector.

What is a Wall-Box?

Within the electric mobility sector, the term Wall-box is used to refer to a charging point for electric vehicles. It is a physical charging point that is installed on the wall and provides electrical current to the electric vehicle to allow its charging. As the name suggests (in English), “wall” (wall) and “box” (box), these charging points are usually hung on the walls and are shaped similar to that of a box.

The advantages of this system with respect to the low-power charger, which you can plug into a conventional socket and which dealerships usually give you when you buy an electric vehicle, are mainly the charging speed and its safety. A low-power charge with a conventional plug can take up to 30 hours, which in addition, if carried out regularly, the useful life of the battery could be considerably reduced.

The Wall-Box can be used with both single-phase and three-phase installations and has all the necessary protection equipment to guarantee maximum safety and at the same time, adjust to the power required by the electric vehicle.

The Wall-Box has an intelligent “Dynamic Power Control” sensor that allows the electric vehicle's charge intensity to be adjusted according to the current consumption within the electrical network to which it is connected, so that it is not exceeded never the power you have installed. In this way, it is avoided that if many connected electrical equipment coincide at a time and an electric vehicle is also connected, an overload of the system occurs. This is because the Wall-Box will reduce the charge intensity of the electric vehicle to adjust to the contracted power of the network in which it is connected. Similarly, at another time when there is no connected equipment, the power will be increased to charge the vehicle more quickly.

How much does it cost to charge an Electric Car?

The cost of charging an electric vehicle will vary depending on the rate you have contracted and the battery capacity of your electric car.

In general, each KWh has an average price that varies depending on the rate you have contracted. The most common rate usually has two price ranges that oscillate between € 0.15 / KWh (during the day) and € 0.06 / KWh (at night). For this reason, to get the cheapest price for charging your vehicle, it is always recommended to charge it at night.

As an example, in the case of the Renault ZOE, which has a 52 kWh battery, if it is fully charged at night the cost would amount to approximately € 3.12; If, on the contrary, the charge is carried out during the day, the cost would amount to € 7.80. Taking into account that the Renault ZOE has a range of 390 km, if you charge the car with the night rate, you would be spending € 0.79 per 100 km.

How long does it take to charge an electric vehicle?

In order to calculate the recharge time of an electric vehicle we need to know the recharge intensity or power of our charger (W) and the capacity of the batteries of our electric vehicle (KWh).

The following formula is used to calculate the charging duration:

Duration = Battery capacity * 1,000 / charger power

* To this calculation, the performance should be added.

As an example, we assume that you have a single-phase charging point that has a power of 7,400 W.

Once we have the power of our charging point, we have to see the capacity of the vehicle's battery. For this example we choose the Renault ZOE which has a capacity of 52 KWh, so if we assume that the recharging performance is 95%, the total charging duration would be:

Recharge time = 52,000 / (7,400 * 0.95) = 7.4 hours

Can I recharge my vehicle in a community garage? Is it necessary to request permission from my community?

Yes you can, from Luzentum we offer you all kinds of solutions for the installation of charging points in community or private garages. We take care of all the necessary procedures regardless of the difficulties that the installation presents, always at the best price.

No, it is not necessary to request permission from your community, it would be enough to simply communicate it, without the need to hold any type of meeting or vote. All this is included in the latest modification of the Horizontal Property Law (Law 19/2009), which modifies Law 49/1960, of July 21, on Horizontal Property.

What regulations regulate the charging of electric vehicles?

The legislation that regulates the charging of electric vehicles is very varied and adapts as technology grows and advances. This type of legislative measures seek to promote the electric vehicle, as we comment below:

  • Royal Decree 1053/2014, of December 12, approving a new Complementary Technical Instruction (ITC) BT 52 «Special purpose installations. Infrastructure for recharging electric vehicles ”, of the Electrotechnical Regulation for low voltage, approved by Royal Decree 842/2002, of 2 August, and other complementary technical instructions are modified. (Link descarga)

  • Royal Decree 647/2011. Load manager. Regulation of the figure of the charge manager within Law 54/97 of the Electricity Sector as a consumer capable of selling electricity to recharge vehicles. (Link descarga)

Royal Decree-Law 6/2010, of April 9, on measures to promote economic recovery and employment, in its article 23, reforms Law 54/1997, of November 27, on the Electricity Sector, to include Within the regulatory framework of said sector, a new subject, the system charge managers, who will provide electricity recharge services, necessary for a rapid development of the electric vehicle as an industrial product that combines the characteristics of technologically innovative, capable of generating a new sector of activity with growth potential and instrument for saving and energy and environmental efficiency.

Regulation of the PVPC regulated rate, where the Electric Car is located.Link PVPC electric car - (Link web tarifas PVPC)

  • Modification of the Horizontal Property Law. (Download Law 19/2009). Modification of the Horizontal Property Law, to avoid the need for a vote when installing a charging point in a community garage by a neighbor. Now only communication is required by the interested party to their community. (Link descarga)

(Descarga Llei 5/2015, only if you are a resident of Catalonia)

Can I install a fast recharge point in my private home?

Yes, you can, but it is totally inadvisable due to its high cost. Normal recharging is designed to be done at night, to take advantage of the special supervalle rate at low cost, for 5 - 8 hours. Quick recharge should only be used in emergency situations, as in the medium term it could limit battery life if used frequently.

What is dynamic recharge (or power) control and how does it help me?

It is an intelligent sensor that allows you to self-regulate the charging of the electric vehicle based on other energy consumptions, in this way it allows you to charge your vehicle to the maximum power that is available at any time, without exceeding the contracted power.

This sensor is included in the new generation of charging points for electric vehicles, if you need more information contact us and we will be happy to provide it.

How much does it cost to install a new charging point supply with a new meter?

All new supply is managed by the electricity distribution companies, they are in charge of channeling and managing it.

If you want to install a new meter to recharge your electric vehicle, you would have to face associated costs per down payment that are regulated by Royal Decree. Although, in the event that the supply is not ready to be installed directly, the distributor will charge you the installation costs it deems appropriate (without these being regulated by regulations).

There are 3 basic concepts that you have to take into account when making an installation for a charging point or any other type of supply:

  • Extension Fee: € 17.374714 for the power you hire

  •  Access Fee: € 19.703137 for the contracted power

  • Down payment rights: € 9.04476 (single payment)

It must be taken into account that the contracted power may not coincide with the one set by the installer.

In case of having to throw a new one up to the door of your building, it can entail very high associated costs.

If you want to know in more detail a budget, contact us and tell us about your case. We take care of everything.

How much does it cost to install a charger for an electric vehicle?

The cost of the installation is very varied since it depends on many factors; type of charging point, number of charging points, distance to charging points, etc.

If you are interested in knowing the budget to install the charging point in your home, call us and request it without obligation.


What are the advantages of agrovoltaica?

Despite a wide variety of agricultural products, climates and solar panel configurations, there are clear advantages and similarities when combining agriculture and photovoltaics.

  • Temperature control. Under the shade of the panels, it is possible to reduce the high daytime temperatures and greater warmth at night. If an increase in air humidity is added to this casuistry, the result is that there are some varieties of crops that achieve 300% more efficient water consumption.

    • On the other hand, the efficiency of solar panels decreases as temperatures increase. The crops that are under the panels emit moisture through the natural process of perspiration, ensuring that the panels do not reach such high temperatures.

  • Need for direct sunlight. Both the panels and the crops need direct sunlight, but in the case of some crops an excess of direct sunlight can prevent their productivity.

  • Increase in productivity. There are several studies that ensure that various types of crops improve their productivity when they are not in direct sunlight (ahem: in the case of tomatoes, the production under the panels was close to double).

  • Less water consumption. Being under the shade of the panels, the humidity of the agricultural land will last longer allowing a lower use of water while maintaining the same levels of food production.

  • Increase in income. In addition to the income that the farmer receives from his crops, which depend directly on atmospheric conditions and pests, a new economic path is created with the sale of the surplus electricity produced to the grid.

Are there grants for agrovoltaic facilities?

Yes, there are grants that you can choose to finance up to 40% of the cost of your installation as long as you meet the required requirements.

Each community has a program to access the aid offered by the European fund EAFRD (European aid fund for rural development).

Get in touch with us and tell us about your case to see if you could qualify for these grants.


Is there any kind of subsidy for my installation?

Yes, there are different types of aid that you can choose depending on the community in which your company is located.

  • Financing at 0% rate
  • Reduction of up to 25% of the IBI

Get in touch with us and we will be happy to ask you what type of aid you can apply for, so that you get the most out of your installation.

What happens to the excess energy that you do not consume?

Thanks to the "simplified compensation for self-consumption" that regulates self-consumption facilities, it is possible to value the surplus energy produced.

This allows all that surplus to be compensated at the end of the month in the electricity bill according to the price agreed with the marketer. This additional "income" from the sale of the surplus is exempt from VAT, since the compensation is not considered an economic activity.

The sale of the surplus must in no case exceed the amount of your electricity bill before taxes, and its settlement will be monthly and not cumulative.