Solar power plants – Renewable energy sources

Solar power plant – what is it?

  • Solar photovoltaic panel – collects solar energy and converts it into direct current.
  • Inverter – converts direct current into alternating current and sends it to appliances and other power consumers in the house or to the power grid.
  • Connection cables – necessary for connecting solar panels, inverters and power consumers.
  • Solar power construction – required for placing solar panels on the roof of the house or other desired position.
  • Optimizers – optional

    • They enable continuous production regardless of string interruption (e.g. due to shading on the panels)
    • They reduce the voltage so that the power plant can be shut down in case of fire
  • Battery – optional

    • Enables autonomy up to 2 days

Advantages of a solar power plant

  • It reduces the costs of electricity and heating
  • It creates additional energy to sell to large suppliers
  • It produces electricity even in cloudy weather
  • Return on investment within 5 to 10 years
  • Warranty on elements up to 12 years
  • Working lifetime up to 25 years
  • The possibility of energy autonomy
  • Low maintenance costs
  • It reduces dependence on large producers

Request a bid for a solar power plant

Solarna elektrana

Steps and required documents:

  1. Filling in a questionnaire with basic information
  2. Send electricity bills from the last year
  3. Making a rough estimate of the cost of the power plant
  4. Making the decision to enter the project
    • Based on the assessment, you make a decision whether you want to start creating the project with regard to the estimated power of the power plant
  5. Development of a conceptual solution (chargeable)
    • In the conceptual solution, you get a detailed financial analysis – production by month, profitability, return on investment, initial cost of the power plant
  6. Making a decision on the installation of the solar power plant
    • Based on the conceptual solution, you decide whether you want to move forward with the project
  7. Development of the main project (chargeable)
  8. Construction (installation) of the solar power plant according to the availability of elements

The total cost of the solar power plant is affected by:

  • Panel selection
  • Choice of inverter
  • Autonomy (battery installation or not)
  • Fire protection (optimisers)
  • Gabled or flat roof (adequate solar panel construction)
  • Specifics on the building (use of basket, elevator, etc.)
  • Distance (object location)
  • Installation costs – 2 or more days of installation, etc.
  • Electronic waste disposal costs of 0,30€/kg (panels)
Solarna elektrana

Solar panels

  • Panels: selection and supply of the best panel for the climate, type of roof, slope and shading; they also depend on the size of the roof and the available surface – panel dimensions depend on the strength and manufacturer
  • Solar power construction for installation of the solar panels is determined depending on the panels, the type of roof coverage and the substructure of the roof
  • Warranty up to 12 years
  • Working lifetime up to 25 years

Solar tiles

  • “Invisible” solar power plants – solar cells integrated into the tile – they do not impair the view of the building
  • Suitable for buildings under protection
  • The possibility of covering a larger area of the roof
  • It is installed like a standard tile – roofing
  • Various colors and shapes are available
  • They are also installed as solar facades
  • 20-year product warranty
  • Productivity guarantee up to 80% – 40 years
  • 50 year warranty against leakage
  • Working lifetime 80+ years

Challenges with solar power plants

  • Your energy supplier’s approval is required for commissioning
  • For single-phase connections, energy suppliers do not approve power plants larger than 3.6kW (in Croatia, check for your country)
  • If there is a rupture in energy supplier’s network, you will also be left without electricity

      • Solution: autonomy – installation of a hybrid inverter and/or battery
  • If you produce more than you consume

      • Not recommended unless you plan to increase your consumption
      • You can limit the production on the inverter
      • You risk your energy supplier transferring you to industrial consumer (in Croatia, check for your country)
  • If the property is divided, you must have the consent of all co-owners
  • When applying for subsidies

      • Prior consent of energy supplier is required
      • Energy certificate required
      • Compulsory development of the main project
      • All papers must be 100% clean in the eyes of the state
in 5 to 10 years