Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/182105 
Year of Publication: 
2018
Series/Report no.: 
HWWI Research Paper No. 182
Publisher: 
Hamburgisches WeltWirtschaftsInstitut (HWWI), Hamburg
Abstract: 
We quantify the cost savings potential of photovoltaic self-consumption by single-family houses with small-scale roof-top photovoltaic (PV) systems in Germany against the background of recent storage applications after the end of the legal support period. We analyze different systems where an already installed PV system is combined with battery storage and/or a power-to-heat solution (heating rod plus thermal storage). A comparison is made in terms of a household's electricity and heating costs under cost-minimizing operation of each system. For this purpose, we carry out comprehensive simulations of site-specific PV production and determine the optimal selfconsumption as well as the optimal charging of the hot water thermal storage and the battery system. We use 25 representative electricity load profiles, which differ only in the temporal distribution of consumption, to obtain a broader picture of the cost savings potential. Results suggest that the major share of the savings potential is due to direct PV self-consumption and thus concerns the electricity costs. A profitability analysis reveals that the inclusion of a hot water thermal storage and/or a battery storage system does not pay off when juxtaposing cost savings and investment expenses, at least at current prices.
Subjects: 
residential photovoltaic
self-sufficiency
battery system
power-to-heat
Document Type: 
Working Paper

Files in This Item:
File
Size
806.57 kB





Items in EconStor are protected by copyright, with all rights reserved, unless otherwise indicated.