Abstract
In terms of levelized cost of electricity, renewable energies are able to compete with cost of conventional grid electricity, as of today in relevant regions of the world. Partially, electricity being generated by renewable energy sources reached to be less expensive than conventional electricity from the grid. Thus, an electricity supply by renewable energy sources becomes more and more attractive. Furthermore, a decentralized electricity generation appears to be reasonable. This, enables everyone to generate electricity at the place where it is consumed, reducing cost by less grid electricity demand. The renewable energy source solar irradiation can be used in a decentralised manner, whereas a combination with energy storage systems is needed since the fluctuating energy flow has to be adapted to the load profile of human activities. This combination is about to enhance high shares of self consumed electricity in ones electricity demand. This paper gives an overview on grid-parity for photovoltaic systems with energy storage for Germany and some more regions of the world. Residential systems are focused. System configurations as a function of specific factors like regional economics, typical consumption profiles and geographical conditions are analysed.
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