Plug-in solar systems are comparatively more cost-effective to purchase. A balcony solar system with a 410 watt solar module provides - depending on conditions and location - between 300 and 400 kilowatt hours of electricity per year and relieves a household of 90 to 120 euros annually. With two solar modules, twice as much solar power and savings on the electricity bill can be achieved. Experience from the thousands of systems already installed shows that mini-solar systems pay for themselves after about five years.

See also: Mounting system for balcony arrays

Manufacturer SelfPV provides a twelve-year warranty on the solar modules and a linear performance guarantee over 25 years on 85 per cent of the module output. (mfo)

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