Alpine solar installations can produce up to four times as much electricity during the winter half-year as installations in the lowlands, the Zurich University of Applied Sciences (ZHAW) said on Tuesday, citing <a href="https://digitalcollection.zhaw.ch/bitstream/11475/28797/3/2023_Anderegg-Strebel-Rohrer_Alpine-Photovoltaik-Versuchsanlage-Davos-Totalp.pdf" target="_blank">research data</a>.