Installation Price of Thermal Solar Panels for Heating and Hot Water
The cost of a thermal solar installation ranges between 600 € - 1,000 €/m² with flat panels and between 900 € - 1,400 €/m² if using vacuum tube collectors.
Amounts are indicative and sourced from the original imported guide. Final budget depends on scope, materials, and prior space condition.
Service Levels and Pricing
Compare different options available based on your budget and solar thermal installation needs.
Basic
Solar thermal system installation with flat panel collectors for a small single-family home. Includes standard quality solar collectors and a smaller capacity storage tank.
Standard
Complete solar thermal system with high-efficiency flat panel collectors, ideal for a standard single-family home. Includes large capacity storage tank and automatic temperature control.
Premium
Solar thermal system installation with vacuum tube collectors offering maximum energy efficiency. Perfect for large homes or high demand for hot water and heating.
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Prices for installing thermal solar energy (heating or domestic hot water)
See what homeowners usually pay for the most common tasks. Use these ranges to fine-tune your scope and avoid missing key items in your budget.
Installing thermal solar panels for domestic hot water in a 150 m² home
6,000 €
Installing thermal solar panels for heating and domestic hot water in a 150 m² home
9,000 €
Installing thermal solar panels for domestic hot water in an apartment building
75,000 €
Installing thermal solar panels and radiant floor heating 150 m²
22,000 €
Installing thermal solar panels and radiators 150 m²
12,000 €
Factors that influence the price with Reformia
The cost of a thermal solar installation ranges between 600 € - 1,000 €/m² with flat panels and between 900 € - 1,400 €/m² if collection is through vacuum tubes.
1. Request for permits
The ordinances of each municipality may vary in this regard. In general terms, a minor construction license or reported activity may be required. In some cases, a project or presentation of documentation signed by a technician may also be required to certify that the installation complies with what is established in the municipal ordinances and the Thermal Installations Regulation (RITE).
2. Calculation of the dimensions of the solar panel system
First, it is necessary to size the domestic hot water installation and heating if the panel is going to function to cover both needs. The calculation of needs is carried out based on the type and use of the property (residential, commercial space, health center, etc.) and the number of people who will use it. There is a document that sets the daily demand in each case, it is CTE DB HE4. For example, using 60ºC as the reference temperature, in the case of homes, the daily consumption of domestic hot water per person per day is calculated at 28 liters.
3. Choice of panel type
Panels can be of two types: flat or vacuum tube. Flat collectors are the most common. They consist of a surface made of a material that absorbs heat and, inside, a set of tubes through which a heat transfer liquid circulates, which is what heats the water through a heat exchanger. They are the most common and also more economical.
The cost of a thermal solar installation ranges between 600 € - 1,000 €/m² with flat panels and between 900 € - 1,400 €/m² if collection is through vacuum tubes.
What is usually included in a quote
Each professional may structure quotes differently, but most project budgets follow this logic.
Typically included
Often not included
How a thermal solar panel works for domestic hot water and heating
The cost of a thermal solar installation ranges between 600 € - 1,000 €/m² with flat panels and between 900 € - 1,400 €/m² if collection is through vacuum tubes.
1. The solar panel has an outer glass cover. Under this are the collectors, which are what absorb the thermal energy received by the cover thanks to a greenhouse effect.
The solar thermal panel is the main component of thermal solar plate installation for heating and hot water. Its glass cover protects internal collectors that absorb solar energy through the greenhouse effect. Panel quality directly impacts the final installation price, ranging from 4,800 € to 20,000 € depending on the system chosen.
2. That energy passes to a closed primary circuit with a heat transfer fluid. This is capable of reaching very high temperatures and efficiently transporting heat.
The heat transfer fluid circulates in a closed primary circuit, reaching very high temperatures to efficiently transport heat from the collectors. This is a critical element in thermal solar panel installation, especially important in combined heating and hot water systems requiring greater thermal capacity.
3. In the accumulator, and through a heat exchanger, the heat transfer fluid transfers the heat energy to the water in it.
The accumulator is the tank where the heat exchanger transfers thermal energy to water via the heat transfer fluid. In a thermal solar panel installation for heating and hot water in 150 m² homes, the accumulator must be properly sized to ensure continuous supply. Its size significantly affects the total budget.
4. The accumulator, thanks to insulation, can maintain water at an optimal temperature for many hours. Sometimes, if the day is cloudy, support from a conventional system, such as electric, may be necessary.
The accumulator insulation keeps water at optimal temperature for many hours, reducing thermal losses in the thermal solar panel installation. On cloudy days, a conventional backup system (electric or boiler) complements heating and hot water. Premium systems include this functionality between 14,000 € and 20,000 €.
What can change your final price
Even similar projects can end with different budgets. These are the factors that most often push costs up or down.
Type of solar collectors
Flat panel collectors range from 600-1.000 €/m² while vacuum tubes reach 900-1.400 €/m², with the latter being more efficient but significantly more expensive to install.
Required collection surface area
The number of square meters of panels needed depends on the household's hot water consumption and the solar radiation in the area, directly affecting the total installation budget.
Installation complexity and accessibility
Hard-to-reach roofs, complicated structures, or the need for structural reinforcement significantly increase labor costs and auxiliary materials.
Storage system and additional components
The accumulation tank, circulation pump, expansion vessel, and insulated piping system represent a significant percentage of the total cost that varies depending on the chosen quality and capacity.
How much does the installation of thermal solar panels cost?
The cost of a thermal solar installation ranges between 600 € - 1,000 €/m² with flat panels and between 900 € - 1,400 €/m² if collection is through vacuum tubes.
When installing thermal solar energy, the goal is to capture solar radiation and convert it into usable energy to supply domestic hot water or heat water for heating circuits. The installation consists of several basic elements:
Types of thermal solar panels
The cost of a thermal solar installation ranges between 600 € - 1,000 €/m² with flat panels and between 900 € - 1,400 €/m² if collection is through vacuum tubes.
Factors that influence the price
The cost of installing thermal solar energy for heating or domestic hot water can vary according to several factors:
- Solar panels or collectors: flat or vacuum tube, their function is to collect energy from the sun, which is why they must be in places where radiation is maximum and have proper orientation. They convert energy into heat and transmit it to a heater thanks to a heat transfer fluid and a heat exchanger.
- Storage tank or accumulator: stores hot water for later consumption. It usually has an auxiliary heater to cover hours when the panels cannot function.
- Primary solar circuit pumps: their function is to move the required flow rate at each moment and prevent pressure losses in the circuits when circulation is forced.
- Hydraulic circuits: the network of pipes through which hot water flows. There is one outlet from the panels and one inlet.
In appearance, they resemble photovoltaic panels, although their operation is very different. In this case, instead of photovoltaic cells, what is under the glass are tubes with a heat transfer fluid. Their color is usually darker to absorb as much solar energy as possible. The main drawback is that they usually do not reach very high temperatures.
Vacuum tube solar panels
This type of solar panel consists of a series of tubes arranged in parallel. The outer part is a transparent glass cylinder and inside it is an absorber. Between both a vacuum is created that creates a kind of greenhouse effect, which allows them to reach higher temperatures and their efficiency to be higher than flat collectors and to maintain heat for longer.
- Automatic control panel: displays the temperature at each moment and allows you to control the operation of the installation.
- Labor: although each company and professional applies their own rates, an installer can charge between 25 € - 35 €/hour.
- Installation dimensions: the characteristics of the installation, whether it is only for domestic hot water or also for heating, and especially the number of panels are one of the factors that most influence the budget, since each collector costs at least around 350 €.
- Type of solar panel: panels can be flat or vacuum tube. The latter are more efficient, but also more expensive, they can average around 700 €, while flat panels would average around 450 €.
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Minor Works
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Frequently Asked Questions
How much does it cost to install solar thermal panels in a single-family home?
The total cost of a solar thermal installation for a single-family home ranges between 3,000 € and 7,000 € depending on the collector surface area needed. For a 4-6 m² system with flat panel collectors, the budget typically falls between 2,400 € and 6,000 €, while evacuated tube collectors can reach 8,400 € for similar surface areas. The price includes solar panels, storage tank, piping, insulation, and installation labor.
How long does it take to install a solar thermal heating system?
A complete solar thermal panel installation typically takes 3 to 5 working days in a single-family home. This timeframe includes placing panels on the roof, installing the storage tank, hydraulic connections, and system startup. For more complex projects or installations with more than 10 m² of collectors, the process may extend to 7-10 days.
What is included in a solar thermal panel installation quote?
A comprehensive quote should include solar panels, hot water storage tank or accumulator, insulated copper piping, safety valves, circulation pump, thermostat and control system, plus installation labor. Some quotes may exclude the storage tank (which costs an additional 800 € to 2,000 €) or special roofwork, so it's important to request a detailed breakdown.
How do I choose a professional installer for solar thermal panels?
It's recommended to request quotes from at least 3 certified installers with experience in solar thermal energy in your region. Verify they have business licenses, liability insurance, and references from previous clients. Also check that they offer 5-10 year warranties on the installation and employ technicians accredited by well-known manufacturers such as Viessmann, Vaillant, or Junkers.
Do I need a permit or license to install solar thermal panels in my home?
Yes, in most Spanish regions you must obtain a municipal building permit before starting the installation, although some municipalities have simplified this process with accelerated procedures. Additionally, depending on your location, a technical inspection before and after installation may be required. Your installer should handle administrative procedures, but it's advisable to check with your local municipality about the specific requirements for your area.
Got more questions? Contact us!
Got more questions? Contact us!
Frequently Asked Questions
How much does it cost to install solar thermal panels in a single-family home?
The total cost of a solar thermal installation for a single-family home ranges between 3,000 € and 7,000 € depending on the collector surface area needed. For a 4-6 m² system with flat panel collectors, the budget typically falls between 2,400 € and 6,000 €, while evacuated tube collectors can reach 8,400 € for similar surface areas. The price includes solar panels, storage tank, piping, insulation, and installation labor.
How long does it take to install a solar thermal heating system?
A complete solar thermal panel installation typically takes 3 to 5 working days in a single-family home. This timeframe includes placing panels on the roof, installing the storage tank, hydraulic connections, and system startup. For more complex projects or installations with more than 10 m² of collectors, the process may extend to 7-10 days.
What is included in a solar thermal panel installation quote?
A comprehensive quote should include solar panels, hot water storage tank or accumulator, insulated copper piping, safety valves, circulation pump, thermostat and control system, plus installation labor. Some quotes may exclude the storage tank (which costs an additional 800 € to 2,000 €) or special roofwork, so it's important to request a detailed breakdown.
How do I choose a professional installer for solar thermal panels?
It's recommended to request quotes from at least 3 certified installers with experience in solar thermal energy in your region. Verify they have business licenses, liability insurance, and references from previous clients. Also check that they offer 5-10 year warranties on the installation and employ technicians accredited by well-known manufacturers such as Viessmann, Vaillant, or Junkers.
Do I need a permit or license to install solar thermal panels in my home?
Yes, in most Spanish regions you must obtain a municipal building permit before starting the installation, although some municipalities have simplified this process with accelerated procedures. Additionally, depending on your location, a technical inspection before and after installation may be required. Your installer should handle administrative procedures, but it's advisable to check with your local municipality about the specific requirements for your area.