TECHNICAL RECOMMENDATIONS Bernhard WilleHaussmann Fraunhofer Institute for Solar

TECHNICAL RECOMMENDATIONS Bernhard Wille-Haussmann Fraunhofer Institute for Solar Energy Systems ISE i. Distributed. PV Project Meeting Madrid, January 22, 2020 www. ise. fraunhofer. de © Fraunhofer ISE

AGENDA n Battery and Inverter n Grid Integration n Energy Management and Control 2 © Fraunhofer ISE

Methodology Technology Review (WP 2) Technical Recommendations Gap Analysis (WP 3. 5) 3 © Fraunhofer ISE Simulation Study (WP 3. 3)

Battery and Inverter n Efficiency of battery system: 95% (datasheet) n Roundtrip efficiency: 90% n In Part load appr. 50% 4 © Fraunhofer ISE

Battery and Inverter residual load curve Feed-in load Efficiency is an overall result of efficiency curve and usage 5 © Fraunhofer ISE

Grid integration Self optimized Gridfriendly external 6 © Fraunhofer ISE • Batteries in combination with PV reduce energy exchanged with grid • Reduction of grid influences • Limit maximal feed-in • Providing reactive power • When is the grid operator allowed to control? • Communication standards (e. g. smart meter)

Energy Management and Control Standard control is applied: maximize onsite self consumption Future developments External Internal • Grid limitations • Electric vehicle • Virtual power plant: external market • Tenant electricity: smart meter communication • Heat pumps 7 © Fraunhofer ISE

Conclusion n Consider system efficiency https: //www. bves. de/wpcontent/uploads/2019/07/Efficiency. Guideline_PVStorage_2. 0_EN. pdf n Consider way of operation n New grid codes guarantee grid friendly operation (e. g. VDE AR 4105) n Various communication interfaces are reasonable for further applications n All interfaces have a strong link to regulation 8 © Fraunhofer ISE

Thank you for your attention! Fraunhofer-Institut für Solare Energiesysteme ISE Dr. -Ing. Bernhard Wille-Haussmann bernhard. wille-haussmann@ise. fraunhofer. de www. ise. fraunhofer. de This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 764452. 9 © Fraunhofer ISE