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Tankers at anchor – a reminder of the fossil-fuel exposure tracked in the Power Barometer 2026

Europe’s clean power passes a stress test, but flexibility gap widens

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Eurelectric’s Power Barometer 2026 finds that clean electricity cushioned Europe from a fresh fossil-fuel shock this year, yet storage build-out is still falling well short of the pace needed to keep the system stable through 2030.

The cradle of the Renaissance and host city for December's Integrated Photovoltaics Conference

Italy – Florence to host conference on solar in the built environment

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The IPV Conference will gather architects, planners and researchers at the Chamber of Commerce on 3 and 4 December to examine how photovoltaics can be integrated into buildings, infrastructure and vehicles.

Valentin Lorscheid, Product Manager, ACCURE Battery Intelligence

Why most operators are stuck in a reactive cycle

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Global battery storage capacity is set to nearly triple by 2030, and operators are already drowning in alarms. Valentin Lorscheid of ACCURE explains how to get ahead of problems, and why independent data matters.

From IoT sensors to solar farms: the main markets IDTechEx sees for perovskite

Perovskite PV heads for surfaces silicon cannot reach

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Lightweight warehouse roofs, vehicles, noise barriers, greenhouses and indoor IoT devices could all become markets for perovskite solar. A new IDTechEx report looks at the decade ahead.

Thomas Yuan is the chairman of AlphaESS

AlphaESS: safer, smarter storage from rooftop to grid

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CEO Talk: What does the future of energy storage in Europe look like? Safer, smarter and more connected, from commercial rooftops to utility-scale projects. AlphaESS shows how a single open system can link all of these applications. Find out more about the company’s strategy.

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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)