Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The development of battery storage systems in Germany: A market review
  (status 2022)   With this update of our previous publications, we publish the latest data of
the market development of battery storage systems (BSS) in Germany, one of the
leading storage markets worldwide. For the analyses of both stationary and
mobile storage markets, we use the public registrations of the German Federal
Network Agency and the Federal Motor Transport Authority, our own databases
from the monitoring of subsidy programs, and bilateral exchange with large
companies. In comparison to 2020, the market for home storage systems (HSS)
grew by 50% in terms of battery energy in 2021 and is by far the largest
stationary storage market in Germany. We estimate that about 145,000 HSS (1.27
GWh / 0.73 GW) were installed solely in 2021. The average specific price for a
medium-sized HSS was about 1,000 EUR/kWh in 2021, showing a price decrease of
8% from 2020 to 2021. The emerging market for industrial storage systems (ISS)
grew by 15% in 2021, with a total of 900 ISS (0.06 GWh / 0.03 GW) installed,
although industrial PV installations decreased. The market growth for
large-scale storage systems (LSS) remains on a relatively low level with 11 LSS
(0.03 GWh / 0.04 GW) commissioned. The market for battery electric vehicles
(EV) doubled in 2021 and new registrations raised to 680,000 EV (22.45 GWh /
31.18 GW). The public charging infrastructure could not follow this growth and
grew linearly with about 11,700 new installations to 50,000 charging points,
most of which are up to 22 kW. The number of EV per charging point grew from 10
in 2018 to 25 in 2021. In total, we estimate that over 430,000 stationary BSS
with a battery energy of 4.46 GWh and a power of 2.64 GW and 1,270,000 EV with
a battery energy of 39.59 GWh, a DC charging power of 51.84 GW, and an AC
charging power of 7.71 GW were operated in Germany by the end of 2021.

3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin