Affordable solar energy storage solutions for balcony power stations now available at under 200 euros per kWh.
In Germany, the trend of balcony power plants, or plug-and-play solar systems, is on the rise. With around one million installed systems totaling approximately 1 GW capacity as of mid-2025, these solar solutions are becoming a mainstream choice for households[1][3].
The SPAUN Energy Master storage solution, designed by DURA-Solar, is a powerful tool for enhancing the self-sufficiency of these balcony power plants. By adding battery storage, households can store excess solar energy generated during the day for use at night or during low production periods. This significantly improves the utilization rate of solar power generated locally, reducing reliance on grid electricity and increasing energy independence[1][3].
The SPAUN Energy Master is compatible with almost all micro-inverters and can be retrofitted into almost any existing mini-solar plant. The storage system includes a smart meter for intelligent charging and discharging exactly according to power consumption. The storage capacity ranges from 2.5 kWh to 12.5 kWh, and the system boasts 2 MPPT trackers at 800W and a charging and discharging power of 1600W[2].
The storage costs for the complete system, including the Smart Meter, are approximately 192 euros per kWh. The SPAUN Energy Master is estimated to have an amortization period of between two to four years, making it a cost-effective investment for households[2].
The boom in balcony power plants is due in part to the abolition of VAT on the purchase of photovoltaic systems and accessories such as battery storage at the beginning of 2023. This, combined with the ease of installation and the potential for significant electricity cost savings, has made these systems attractive to many Germans[1][3].
The Federal Network Agency (BNetzA) registered only around 100,000 balcony power plants in 2022, but this number is expected to grow rapidly. Germany added 4.65 GW of new solar capacity in Q1 2025 alone, with rooftop and balcony solar as leading segments, driven by renewable policy and consumer demand[1].
The SPAUN Energy Master reduces electricity costs by up to 66 percent, potentially saving households up to 800 euros per year according to DURA-Solar[2]. With such savings, it's no wonder that 15% of Germans are planning to buy a balcony power plant[1][3].
The SPAUN Energy Master is suitable for different application areas, such as balconies, rooftops, gardens, and house walls. As the milestone of 1,000,000 balcony power plants draws near, it's clear that these systems, coupled with advanced storage solutions like the SPAUN Energy Master, will play an important role in Germany’s decentralized solar future.
Sources: [1] Bundesverband Solarwirtschaft (bsw-solar) [2] DURA-Solar [3] Deutsche Welle (DW)
- The SPAUN Energy Master, a product by DURA-Solar, is a prominent technology in the energy storage sector, designed to boost the self-sufficiency of balcony power plants, thus making solar energy more efficient and independent from grid electricity.
- By adding battery storage to their solar systems, households can store excess energy generated during the day for use during night-time or low production periods, thereby maximizing the utility of locally generated solar power.
- The increasing popularity of balcony power plants in Germany is attributed to factors such as the abolition of VAT on photovoltaic systems and accessories, the ease of installation, and the potential for significant electricity cost savings – as reported by sources like bsw-solar, DW, and Deutsche Welle.
