Germany develops photovoltaic energy storage companies

Sustained growth is forecasted in the market for new PV capacity for years to come. Concurrently, battery systems are expected to reach a capacity of at least 100 GWh by 2030, reflecting a transformative shift within the German energy system towards renewable energy integration.

To date, most battery storage systems in the German electricity system have been used exclusively to optimize self-consumption. Consequently, an exponentially growing number of homeowners and companies store solar power for times when solar generation is low.

The focus of this transformation is decarbonisation, which is being driven forward by the German government with ambitious targets. The goal: increased resilience. The accelerated expansion of photovoltaics (PV) plays a central role in this transformation. A complex task that opens up new design and growth options.

The annual growth rate during this period is eight per cent. The expansion also includes the replacement of old PV systems ("repowering"), which is currently still marginal, but could amount to up to 15 GWp/a in the phase after 2040. Looking at the historical market development, two growth phases of photovoltaics in Germany can be distinguished.

In 2019, 46% of all commissioned residential rooftop PV systems had already been paired with battery storage systems. Remarkably, this share surged to 77% in 2023, indicating a significant upward trajectory of the trend toward combining PV residential rooftop systems with battery storage in Germany.

Battery Storage Boom: 1.2 Million Systems Installed Notably, battery storage systems, also essential for Germany's renewable energy transition, constitute a significant component of this ecosystem, with 1.2 million installed systems.