In his PhD thesis work, Emil Nyholm, studies the impacts of solar photovoltaics, demand response and energy storage in single-family dwellings on the electricity system. The results indicate that under the current market and policy setup, which provide added value in self-consumption of PV generated electricity, i.e. not paying taxes and variable grid fees on self-consumed PV generated electricity, an expansion of household PV systems in Sweden is likely to take off during the upcoming ten years. Such expansion is driven by economic incentives and appears to be robust with regards to the composition of a future electricity system. The household’s economic potential for battery investments is found to be dependent to a large degree upon the economic value of utilizing them for the economic value of increased self-consumption of PV generated electricity as well as arbitrage trade once in place. However, there is a clear limit in the value of increasing the battery size. Battery sizes above 10-15 kWh for a 5 kWp household PV facility present only marginal benefits with respect to profitability and increasing self-consumption.
The PhD dissertation can be downloaded from Chalmers Publication Library