Frequently Asked Questions

What is solar energy?
What does photovoltaics mean?
What is solar heating?
What are the benefits of solar heating?
What does a solar heating system cost?
Photovoltaics vs. solar heating?
What components comprise a photovoltaic system?
Do I need a building permit for a PV system?
What is the useful life of a photovoltaic system?
How long are plots leased for a PV system and what how high is the lease rate?
Where can I build a photovoltaic system?
How can one tell if a plot is principally suited for a PV system?
How will technology and costs develop?
Does a PV system require regular maintenance and cleaning?
Can hail destroy the system?
Do I need to protect the system against lightning?
Do photovoltaic systems cause electromagnetic pollution?
Why should I choose PV?
How long does it take to install a PV system?
How much energy does a PV system generate?
What is grid parity?
What does kWp mean?
Does solar electricity have to be fed into the public grid?
How is a solar cell designed?
Are there subsidies?
How big does a PV system have to be?
How much carbon dioxide do I save with a PV system?
What types of PV modules are available?
What does Wp mean?
What does kWh mean?
What follow-up costs will I incur?
What cell types are there?
Are there examples for thinfilm technologies?
What efficiencies do solar cells have?
How does the electricity come into the public grid?
How does a stand-alone system work?
What roofing types are there?