21 Feb 2020 11:00am to 12:00pm

Degrees of displacement: The impact of household PV battery prosumage on utility generation and energy storage

Dr. Wolf-Peter Schill is the deputy head of the Department Energy, Transportation, Environment at the German Institute for Economic Research (DIW Berlin). His areas of expertise include power market modelling,...
The University of Melbourne
Kelvin Say is a researcher at the University of Melbourne. He focusses on the effect of customer-scale renewable energy technologies on the socio-economics of electricity markets. Kelvin’s broader research interests...

Reductions in the cost of PV and batteries have the potential to encourage households to invest in PV-battery prosumage. This may have wide ranging implications for the rest of the electricity system. We explore these system impacts, using two open-source techno-economic models and apply them to scenarios in Western Australia for the year 2030.

Household PV capacity generally substitutes utility PV, and less so as additional household batteries are installed. Wind power is less affected, especially in scenarios with higher shares of renewables. With household batteries operating to maximise self-consumption, utility battery capacities are hardly substituted. Wholesale prices faced by non-prosumage households slightly decreases with prosumage, while those of other consumers are slightly increased.

Overall, the growth of prosumage has substantial implications on optimal utility investments and dispatch and should thus be considered by all electricity system participants.


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