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Weekend Read: A 10 GW time bomb

It is estimated that 10 GW of solar modules in Germany suffer from prematurely aging backsheets, with sites of all sizes affected. pv magazine Germany’s Cornelia Lichner looks at how to detect and repair such defects.


Polypropylene absorber to simplify brine heat pumps’ adoption

German company Mefa Befestigungs- und Montagetechnik has developed absorbers made of polypropylene that are intended to simplify the use of brine heat pumps. The novel technology should make it possible to combine multiple heat sources, including water, earth, air and also ice storage all within a single system.

The weekend read: Energy storage efficiency and prices determine economics

Estimating the total cost of energy storage connected to a rooftop PV installation is a complex affair, involving factors such as tax, the policy environment, system lifetimes, and even the weather. As part of its extensive overview of distributed energy storage in Germany, pv magazine Germany analyzed the efficiency of different battery energy storage systems to create a comparable index that illustrates the cost of a stored kilowatt-hour.


Solar bakery as a containerized solution

The 52 kW containerized solution is being developed by German start-up Solarbakery. The bakery’s production process was adapted in such a way that the majority of electricity consumption is already incurred during the day and is only baked briefly in the dark before dawn.


Meyer Burger unveils new solar tiles

Meyer Burger plans to start selling a new building-integrated PV product from 2022. It says the solar tiles have a high energy yield, with simplified installation and the ability to also provide heating. German engineering company paXos designed the tiles.


Hybrid PV-thermal modules providing heat source to brine-water heat pumps

Developed by Dutch company UseAllEnergy, the module is fabricated with a heat exchanger placed on the rear side that works as a heat source for a brine-water heat pump. Thanks to this innovation, the heat pump does not need to get heat from a borehole yet can still generate sufficient thermal energy. The solution is claimed to be easy to install and also to be suitable for retrofits.


The weekend read: Electromobility meets battery storage

Now in its 10th year, pv magazine Deutschland has once again conducted its market overview of residential battery storage products. As the leading global distributed storage market, technology and application trends from Germany, including the shift to EV-charging integration, are enlightening for market participants throughout the world. Interestingly, price declines remain slow.

Climate district relying on solar-powered hydrogen in Germany

A 1 MW electrolyzer in the middle of a residential area in Esslingen, southern Germany, is intended to significantly reduce the carbon footprint of its residents. One of the energy sources used in the project is rooftop PV located in the area.


Solarwatt, BMW launch new storage system for residential PV

The smallest of the storage units has a capacity of 4.8 kWh and an output of 1.5 kW. It can be expanded to eight battery modules in steps of 2.4 kWh and has a maximum of 57.6 kWh, and 6 kW, of power.


Overview of large-scale and commercial storage systems: Diverse business models, falling prices spur market growth

pv magazine’s updated market overview now lists details for 54 suppliers offering 198 systems, components, or services in the field of large-scale and commercial power storage. Many of the market players highlighted a range of particularly sought-after business models in the information they provided. The most frequently cited in the survey was a business model that increases the share of self-consumption in combination with solar PV plants and peak-load capping.

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