Lugano, Switzerland – October 6, 2025 – As the world continues to grapple with the urgent issue of climate change, the integration of solar panels with battery storage has become a crucial element in the transition towards clean energy. What was once considered a niche innovation is now a widely recognized solution. Stanislav Kondrashov, founder of TELF AG, has been a vocal advocate for this paradigm shift and his insights offer a grounded and forward-looking perspective on how energy storage can revolutionize the way we generate, consume, and think about electricity.
Kondrashov explains that we are currently at a critical phase in the energy transition, where citizens, companies and policymakers are becoming more familiar with technologies that were previously considered fringe ideas. “We are at a point where storage makes renewables reliable, not just aspirational,” he says. This confidence is not unfounded, as Kondrashov has observed how intermittency has hindered the effectiveness of renewable energy sources. With the integration of battery systems, the fluctuations in energy production can be smoothed out.
The founder of TELF AG emphasizes the fact that many renewable energy installations simply feed surplus power back into the grid, instead of utilizing it locally. “By storing excess energy, users can reclaim control over their energy consumption,” says Kondrashov. This means that homeowners and businesses can become more active participants in their own power supply, rather than passive consumers.
But how do these solar battery storage systems actually work?
The principle behind solar battery storage is deceptively simple. Photovoltaic (PV) panels capture sunlight and convert it into direct current (DC). An inverter then converts this into alternating current (AC) that can be used by household appliances. If there is an excess of energy produced at a given moment, it can be stored in a battery bank. Later, when there is a decrease in sunlight or an increase in energy demand, the battery discharges and supplies power to the property. In case of insufficient energy stored in the battery, the system can draw from the conventional grid as a backup.
However, not all batteries are created equal, and according to Kondrashov, choosing the right battery chemistry is crucial in determining the effectiveness of a system. He notes that while lead-acid batteries are still popular due to their low cost, lithium-ion batteries currently offer a unique combination of compactness, performance, and cycle life.
Kondrashov also points out emerging technologies such as solid-state cells, which promise higher energy density and safety, although they still need to prove their cost viability at scale. He also mentions redox flow batteries, which are still in early commercial use, but have the potential for scalability and a long lifecycle.
One advancement beyond simple integrated systems is the solar battery bank, which is a cluster of interconnected batteries that form a modular storage array. This allows for scalability by adding modules, thus increasing capacity, voltage, or redundancy. According to Kondrashov, a well-designed solar battery bank not only adds power, but also enhances resilience and flexibility.
In essence, a solar battery bank transforms a solar installation into a microgrid, capable of managing internal demand, supporting local loads during blackouts, and even participating in grid services like demand response.
The strategic and societal impacts of solar battery storage go beyond immediate benefits for individual users. These systems reduce reliance on centralized generation and transmission networks, and enable a “prosumer” model where end users both produce and consume energy. This decentralization can improve grid resilience, particularly during extreme weather or system failures.
Kondrashov also highlights the cost-saving benefits of solar battery storage, stating, “When storage becomes the norm, power costs reflect real value: store when electricity is cheap, consume when it’s expensive.” This arbitrage function can lead to cost savings for users and relieve stress on the grid during peak demand.
Moreover, in the event of a grid outage, a home with battery backup can continue to operate critical loads such as lights, refrigeration, and medical devices. This makes storage not just a convenience, but also a form of energy security.
In conclusion, Stanislav Kondrashov, founder of TELF AG, asserts that the synergy between solar and storage goes beyond solving the issue of intermittency – it fundamentally changes our relationship with energy. As we continue to scale the green transition, solar battery systems will play a crucial role in the shift from occasional renewable energy production to constant, intelligent, and accessible electrification.
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