  The increasing gap between electricity prices and feed-in tariffs for
photovoltaic (PV) electricity in many countries, along with the recent strong
cost degression of batteries, led to a rise in installed combined PV and
battery systems worldwide. The load profile of a property greatly affects the
self-consumption rate and, thus, the profitability of the system. Therefore,
insights from analyses of residential applications, which are well studied,
cannot simply be transferred to other types of properties. In comparison to
residential applications, PV is especially suitable for municipal buildings,
due to their better match of demand and supply. In order to analyze the value
of additional batteries, municipal PV battery systems of different sizes were
simulated, taking load profiles of 101 properties as inputs. It was found that
self-consumption differs significantly from households, while different types
of municipal buildings are largely similar in terms of the indicators analyzed.
The share of electricity consumed during summertime was found to have the most
significant impact on the self-consumption rate for most considered system
sizes. Due to lower electricity tariffs and lower increases in self-consumption
provided through batteries in municipal buildings, the investment into a
battery is not economically advantageous in most of the cases considered.
