PhD Defence: Improving local use of electricity generated by rooftop photovoltaic systems
PhD student Geet Litjes assessed the technical, economic and environmental benefits of local use of energy generated by rooftop PV systems.
He concludes that about 33% of the PV generated energy of residential systems can be directly consumed by dwellings. This is 44% by commercial buildings. Stationary battery energy storage can charge surplus PV electricity and therefore increase self-consumption. A 1 kWh storage capacity per MWh of annual electricity consumption increases self-consumption by 23% for residential buildings and by 22% for commercial buildings. Only 4% of PV electricity during the systems lifetime is lost when a feed-in limit of 0.5 kW per kWp is imposed. This can be reduced to 0.2% using a 1 kWh storage capacity for each MWh of annual demand. Discounted payback times for PV systems are around 10 years for residential systems and 12 years for commercial systems. Dwellings with a PV capacity of 1 kWp for each MWh of annual demand contribute with about 17 tCO2eq to avoided life cycle greenhouse gas emissions.
- Start date and time
- End date and time
- University Hall, Domplein 29, Utrecht
- PhD candidate
- Geert Litjens
- Here comes the sun: Improving local use of electricity generated by rooftop photovoltaic systems
- PhD supervisor(s)
- Wilfried van Sark
- Ernst Worrell
- More information
- Full text via Utrecht University Repository