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The simpler the setup, the more modules find themselves leaving the premises

Solar Investors Guide #6 – Minimising risks

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Investing in solar parks, expansive rooftop systems and cutting-edge battery storage requires patience and a genuinely long-term outlook. Such projects are generally designed to run for twenty years or more, making it crucial to safeguard them against a broad spectrum of risks over their lifespan – an important issue that is still too often neglected.

The Home Manager Plug-In is more compact, faster to integrate and better suited to retrofitting

Sax Power splits home energy line into Pro and Plug-In versions

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The DIN-rail Pro targets new installations with a full feature set, while the compact Plug-In is built for faster, retrofit-friendly installation.

Energy Decentral's Innovation Awards spotlight new and enhanced solutions, including those for on-farm solar supply

Energy Decentral – apply now for the Innovation Awards

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The DLG is accepting submissions for its 2026 Innovation Awards until 31 July, offering Energy Decentral exhibitors in Hanover a broad marketing package and stronger presence at the fair.

Gerard Scheper, CEO of Netherlands-based European Solar

Beyond recovery: solar enters a new industrial chapter

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After a punishing downturn, Europe's solar market is finding its footing. European Solar’s Gerard Scheper argues the deeper change lies in the industrial and political reset now taking shape around it.

Johannes Klag (right) is the product manager for energy management and charging solutions at Hager Germany

Hager: in-building energy supply with storage and EV integration

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PV Guided Tours: Energy management systems integrate not only solar installations and storage but also electric vehicles through bidirectional charging. How does it work, and which functions do such systems offer?

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What is photovoltaics?

Photovoltaics (PV) refers to the generation of electrical energy from sunlight. At the heart of this process are the solar-active semiconductors known as solar cells, which capture sunlight and convert it directly into electricity.

From a technical standpoint, a PV system or solar installation functions as a generator. Here, individual solar cells are combined into a solar module, which is protected from the elements. These modules are then assembled into a larger solar generator, which can be mounted on rooftopsfaçadesopen ground or specially designed structures. The electricity generated is direct current (DC), which is converted into alternating current (AC) by an inverter. This AC power can be used directly on site or fed into the public grid via the building’s connection. The electricity is typically supplied to the local utility or grid operator.

Larger PV systems installed on open land are often called solar parks. These feed power into the grid via dedicated transformers and switchgear. In many countries special Acts and regulations govern remuneration for solar power, whether via feed-in tariffs or market premiums for direct sales to third parties.

Self-consumption can be increased by using solar power for heating waterroom heating, air conditioning or refrigeration. Battery storage systems help by storing surplus solar electricity for later use. These so-called solar batteries improve system reliability, especially when solar output dips.

Not all incoming sunlight is converted into electricity. The conversion rate depends on the intensity and wavelength of the incoming light spectrum. This ratio between usable electrical output and the maximum available solar radiation is known as efficiency.

The performance of a solar generator or storage system is defined by its output. When multiplied by the number of sunshine hours, this gives the solar yield – the amount of electricity generated per day, month or year. In addition to charging and discharging power, solar batteries are also rated by their capacity, or the amount of energy they can store. Power is measured in kilowatts (kW) or megawatts (MW), while energy and yield are expressed in kilowatt-hours (kWh) or megawatt-hours (MWh). (HS)