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

Latest news

A rooftop array high in the Alps – exactly the terrain HW4 certification is built for

Solarroof clears highest Swiss hail resistance class

-

The company's Solrif in-roof and standard on-roof modules have both been certified to HW4, the top hail resistance classification recognised by Switzerland's Association of Cantonal Fire Insurers.

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

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

-

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.

Uri Sadot (right) and Karsten Schäfer discuss the latest cybersecurity topics.

Solar Investors Guide #7 – Hackers highlight solar infrastructure risks

-

Podcast: Cybersecurity is a critical issue for inverters and solar storage. Uri Sadot, Cybersecurity Programme Director at SolarEdge and Chair of Digitalisation at SolarPower Europe, outlines system vulnerabilities, recent incidents and the urgent need for preventive action. He warns: caution blocks criminal access, while hesitation invites costly failures and grid disruptions.

Maximilian Schletter (right) is expert in mounting systems

SL Rack: fast and compliant mounting for every type of roof

-

PV Guided Tours: Demands on mounting are rising, and manufacturers are responding with designs that meet rooftop regulations while still allowing rapid installation. Ludwig Maximilian Schletter of SL Rack demonstrates how it works.

Rooftop solar meets classic Swedish architecture, exactly the pairing the type-approval reform aims to standardise

Sweden – type-approval reforms could streamline new-home solar

-

New proposals to introduce type approval for detached houses aim to shorten lead times and cut construction costs. The solar trade association Svensk Solenergi is responding to the consultation, calling for the scheme to align with forthcoming EPBD solar requirements.

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)