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Buildings, transport and industry, all rooted in the same demand-side thinking

Using less energy emerges as a public-friendly climate strategy

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A new IIASA-led study finds that climate strategies which cut energy and resource demand tend to improve quality of life across a broader range of dimensions than supply-side alternatives, and that communicating these benefits can strengthen public support.

This warehouse in Venlo is a major hub for solar components

Solar Investors Guide #12 – Supply chains embrace green operations

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Podcast: Specialist retailer BayWa r.e. Solar Trade is setting new standards for emissions-free logistics.Suppliers, transport, buildings, and packaging are all being examined, and notable progress has already been made. Dominik Dohr, Vice President of Global Procurement and Supply Chain at BayWa r.e. Solar Trade, has a clear vision in which renewable energy and sustainability go hand in hand. As Europe’s largest solar retailer, the company aims to cut emissions across all areas, from internal processes to logistics and supply chains.

A hybrid solar-plus-storage project in Corsica – the combination that utility-scale is now built around

Europe hits 100 GWh as utility-scale takes over the storage market

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A 48% expansion in 2025 pushed Europe's operational battery fleet past the milestone, with large-scale systems accounting for more than half of new installations for the first time, SolarPower Europe's European Battery Market Outlook finds.

The truly vast solar that is Energiepark Witznitz-
Solar Investor’s Guide

New opportunities for a former tailings dump in Germany

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Energiepark Witznitz: With an output of 650 megawatts, the solar park south of Leipzig marks a milestone in project development. Register now to download our special edition free of charge. Investor newsletter subscribers receive it directly to their desktop.

Pulling double duty in the Spanish sun – the carport at the Hotel Cigarral Santa María near Toledo

Spain – municipalities take on a bigger role in energy communities

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UNEF and Castilla-La Mancha's regional government are working to give municipalities a stronger role across the country's 837 energy communities, where local involvement already runs deep.

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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)