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Solar panels meet English hedgerows at Maisemore, Gloucestershire

UK – European Energy secures £58.1m for Cornish solar-plus-storage

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Danske Bank is financing the construction of Indian Queens, a hybrid renewable asset combining a 68 MW solar park with a 47.5 MW / 95 MWh battery system. Commercial operations are expected in 2027, with both generation and storage sharing a single grid connection.

Solar in the Italian Alps – some way from the substation, but part of the same equation

Italy – Axpo backs Zelestra's 830 MWh project in Friuli-Venezia Giulia

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Zelestra has signed a ten-year tolling agreement with Axpo for a 207 MW storage project in northeastern Italy, its first BESS development in the country and one that would make it Italy's second-largest holder of authorised battery storage capacity.

Rows of storage capacity at Immingham, among the largest three-hour batteries in the country once live

UK – Immingham battery secures financing, decade-long revenue floor

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Econergy has closed its second UK storage deal with Santander and EDF this year, underpinning what will become one of Britain's largest batteries operating above two hours.

Our guest author Harry Wolkenfelt, CEO and founder of Solarif Group

Risk management, not insurance, will decide the future of solar and BESS

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As solar and battery storage projects scale up, the industry's exposure to fire, serial defects and unmanaged risk is outpacing its reliance on insurance alone, argues Harry Wolkenfelt of Solarif Group.

The subsidy is only available if the applicant actually lives in the house

Croatia – €36 million earmarked for solar, storage and heat pump grants

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Homeowners can claim up to 50 percent of installation costs from 2 September, with battery storage funded only alongside a new photovoltaic system.

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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)