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Frequently Asked Questions

> Solar Energy > Frequently Asked Questions 


Here are the questions and answers most frequently asked about Solar PV.


A. Solar Power Definitions

  • 1. What is a kilowatt peak (kWp)?
  • 2. What is a kilowatt hour (kWh)?

    • B. Solar System Size

  • 1. How much area is required for a 2kWp system?
  • 2. What size PV system do I need?

    • C. Investment and Prices

  • 1. How quickly will a solar electric system pay back the cost of installation?
  • 2. What is the cost of a solar PV system?
  • 3. Can solar add value to my property?

    • D. General Solar Power Questions

  • 1. How does a solar electric system work?
  • 2. What happens if there is a power cut?
  • 3. How efficient are solar panels?
  • 4. How can the energy benefits of the system be maximized?
  • 5. Do the PV panels / tiles need direct sunlight to work?
  • 6. How long do solar panels take to payback the energy that was used in their production?
  • 7. What happens at night?
  • 8. Does the glass front of the panels reflect light away?
  • 9. How much energy will I generate?
  • 10. Are there different types of solar systems ?
  • 11. How does all this work with my existing power company?
  • 12. How can I be sure I am using the free electricity?

    • E. Installation Questions

  • 1. Do I need planning permission?
  • 2. Does the system need batteries?
  • 3. What is the proposed design for the system, in particular roof fixing, layout etc?
  • 4. What's a good roof for solar?
  • 5. How much weight will the solar electric system put on my roof?
  • 6. How long does it take to fit the solar system?

    • F. Maintenance & Safety

  • 1. Who is responsible for looking after the panels?
  • 2. Who insures the panels (in the case of vandalism or accidental damage, for example)?
  • 3. Will our roof tiles be damaged in the installation?
  • 4. Is the energy produced affected if the panels get dirty?
  • 5. How long do solar panels last?
  • 6. Do solar photovoltaic roof tiles and panels need cleaning?
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