Skip to main content Skip to main navigation Skip to site search

Latest news

Four tiers of safety, one very large ventilation grille

Aqua E261 packs 261 kWh into each cell-cooled cabinet

-

Clou Electronics and Midea Energy have developed a C&I storage unit for Europe that combines 314 Ah cells with pack and cell-level cooling and up to 90 percent efficiency.

Parking garages are attractive assets that enhance their worth through solar facades.

Solar Investors Guide #5 – Solarised parking and charging

-

The era of petrol and diesel dominance is drawing to a close. Mobility is transitioning to electric, with millions of private electric cars, company fleets, and commercial vehicles creating new demands on the energy supply. Filling stations, parking garages, and parking lots now represent opportunities to provide EVs with solar power.

Florian Achatz (right) is the CEO of mounting specialists Novafixx

NovaFixx: making rooftop installation simpler and safer

-

PV Guided Tours: Speed and simple handling are what installers demand of rooftop mounting. With versatile substructures and just a handful of tools, modules can go onto virtually any roof in record time. Sounds too good to be true? Watch the video.

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

Perovskite PV heads for surfaces silicon cannot reach

-

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.

Polina Kolodiazhna, who works with Greenpeace on solar for hospitals; behind her, the remains of a hospital in Trostianets struck by Russian rockets

Russia steps up its terror campaign against Kyiv

-

Ukrainians have lived with Russia’s full-scale invasion for years. Since September, attacks have grown more frequent and more brutal. With winter approaching, help is needed more than ever.

Latest videos

More videos

PV on Tour PV Guided Tours


 

markets

financing

hybrid generators

inverter

mounting

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)