Articles written by Ralph Diermann

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Applications & Installations
TWL unveils PVT panels for ground-source heat pumps The German specialist for solar thermal energy and heat storage said its new PVT collectors rely on double-glass and monocrystalline TOPCon cells. The product has a power conversion efficiency of 22.5% and a maximal thermal ouput of 1,100 W.
Ralph Diermann
Apr 07, 2025
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Markets & Policy
European Solar Manufacturing Council urges Borussia Dortmund not to use JA Solar modules The European Solar Manufacturing Council (ESMC) has criticized Borussia Dortmund’s decision to install 11,000 JA Solar panels on its stadium roof, citing the supplier’s exclusion from the US market over alleged links to forced labor. JA Solar responded to these accusations stating that SolarPower Europe’s Solar Stewardship Initiative (SSI) previously investigated its supply chain and found that it didn’t violate the SSI Principles
Ralph Diermann
Apr 04, 2025
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Applications & Installations
Borussia Dortmund plans 4.2 MW PV system at soccer stadium Borussia Dortmund, a German soccer team, is partnering with JA Solar and RWE to install a 4.2 MW solar system with battery storage at its stadium, supplying 4 MWh for on-site consumption. A smaller PV installation is already in operation on the stadium roof.
Ralph Diermann
Mar 27, 2025
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Applications & Installations
Austria installs 2.2 GW of PV in 2024 Austria installed 2.2 GW of new PV capacity in 2024, bringing its cumulative total to 8.3 GW by the end of the year, according to industry group PV Austria.
Ralph Diermann
Mar 27, 2025
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Applications & Installations
Germany concludes rooftop PV tender with lowest bid of €0.079/kWh The German authorities have allocated 317 MW in the nation’s latest rooftop PV tender. The final prices ranged from €0.0790 ($0.0852)/kWh to €0.0969/kWh.
Ralph Diermann
Mar 26, 2025
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Applications & Installations
Germany deploys 1.53 GW of PV in February The country’s cumulative installed PV capacity reached approximately 102.3 GW at the end of February.
Ralph Diermann
Mar 18, 2025
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Applications & Installations
The impact of PV on peatlands Germany’s Fraunhofer ISE and partners have tested different PV systems on peatland and have pointed out the importance of only developing drained and heavily degraded peatlands for the dual use of carbon storage in peat and solar power generation.
Ralph Diermann
Mar 18, 2025
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Applications & Installations
Germany deploys 16.2 GW of solar in 2024 Germany installed 16.2 GW of solar in 2024, bringing total PV capacity to 99.3 GW by the end of December 2024, according to the Federal Network Agency (Bundesnetzagentur).
Ralph Diermann
Jan 08, 2025
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Applications & Installations
Germany set to cross 100 GW milestone Germany might exceed 100 GW of cumulative solar capacity in 2024, as new projections from Bundesverband der deutschen Energie- und Wasserwirtschaft (BDEW) estimate 17.5 GW in new PV installations.
Ralph Diermann
Nov 28, 2024