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

Latest news

Guest author, solar market expert Gerard Scheper

Opinion: Battery storage is becoming growth infrastructure

-

Gerard Scheper of European Solar argues that the positive sentiment seen after Intersolar Europe is no longer just sentiment, it is slowly turning into action.

Oliver Glenz (right) explains intelligent combiner boxes including insulation monitoring on string level

HIS Renewables: innovations in the DC field

-

CEO Talk: Solar parks are growing in size, with cost pressure, construction timelines and availability all becoming tighter. How can projects be implemented faster, more cost-effectively and more reliably? What role do pre-assembled cabling, aluminium cables and smart combiner boxes play? Oliver Glenz, CSO of HIS Renewables, has all the answers.

Farmyard by day, energy hub by night

Sonnen's new storage unit delivers 261 kilowatt-hours

-

The southern Germany-based manufacturer is targeting small and medium-sized businesses with the Sonnenpro Compact 261 and a matching energy management system, the Sonnenpro EMS.

Fixed-tilt and facing the same direction: not always a given in energy policy

IEA: Middle East crisis driving investment in electrification

-

Countries are responding to the second energy crisis in five years by expanding electricity investment and turning to new supply routes and domestic resources, the International Energy Agency (IEA) reports.

Hybrid systems are now standard in the majority of applications

Solax Power: new systems for residential and commercial buildings

-

PV Guided Tours: The market expects complete and well-integrated systems that are intelligently managed and, increasingly, supported by AI. We find out what makes it possible to build smart energy systems of this kind.

Latest videos

More videos

PV on TourPV 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 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)