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From a previous delivery: hospital staff carry in the equipment themselves

Another Biohaus solar shipment heads to Ukrainian hospitals

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A Biohaus Foundation truck packed with solar modules and batteries is due to leave Paderborn for five sites across Ukraine. Among them are hospitals in Kyiv, Sumy and Trostianets, which will need power they can rely on as winter approaches.

Dr Tim Juan (left) is CTO of Ampace

Ampace: strategies and innovation for the European storage market

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CEO Talk: The European energy storage market is growing dynamically, and so are the demands on profitability, safety and system integration. We find out how Ampace is positioning itself in this environment, the role Europe plays for the company, and which advances and technologies are set to shape the market next.

1,400 delegates gathered at the historic Beurs van Berlage in Amsterdam on 4 and 5 November for the tenth RE-Source

How buyers get a 15-year PPA past the C-suite

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How do you convince a CFO to commit to a fixed electricity price for the long term? At RE-Source 2026, a panel of buyers, sellers and advisers set out what works, what fails and why the internal process often matters more than the deal itself.

Every container here is talking, but is anyone listening?

Alert fatigue is costing battery operators money

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As global battery storage grows towards 500–700 GWh by 2030, ACCURE’s Valentin Lorscheid argues that reactive operations and single-vendor monitoring are eroding returns, and explains how operators can get ahead.

The halls of Ptak Warsaw Expo, home to the show for its sixth edition in January

Poland – Solar Energy Expo kicks off 2027 with storage and smart control

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From 12 to 14 January, Ptak Warsaw Expo will host the sixth edition of the show, with Huawei Polska, Sigenergy and Ingeteam among the exhibitors, and a dedicated zone for installers looking for new partners.

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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)