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Once a trading floor, now a conference hall – the Beurs van Berlage welcomes RE-Source 2026

In Amsterdam, RE-Source 2026 catches the PPA market mid-rethink

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Solar cannibalisation, stalled grids and a second year of falling contract volumes set the backdrop for the conference, where buyers and sellers looked to hybrid deals and system-wide flexibility.

Gregor Kuschmann (right) presents the new Battery vision 2

Solarwatt: from home to market – complete systems for buildings

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PV Guided Tours: Homes are increasingly becoming energy producers. Sector coupling within the building is growing in importance and even electric vehicles are now part of the picture. Gregor Kuschmann and Robert Pawlik of Solarwatt explain which components and solutions make energy independence possible and how buildings are playing a new role in the energy market.

Each pack on these shelves started out under a rental scooter

Germany – Fraunhofer spin-off sends scooter packs back to work

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EDENenergy delivered its first 70 kWh commercial system in mid-October. Of the 350 used batteries tested to date, many still showed over 90 percent health, beating the start-up’s 80 percent forecast by a wide margin.

No EnergyDecentral without solar – PV will be a key theme again in 2026

EnergyDecentral 2026 – registration now open

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High demand is already shaping up for EnergyDecentral 2026, and DLG continues to accept exhibitor applications ahead of the trade fair‘s opening in Hannover on 10 November.

A new grant brings electric cars within reach of more Croatian households

Croatia launches EV subsidy scheme for private households

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Households can claim up to €9,000 towards an electric car, and €2,500 for an electric motorcycle or moped, from a €20 million fund. Applications open on 28 October 2026.

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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 rooftops, façades, open 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 water, room 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)