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Sweden is testing a semi-truck trailer covered in 100 square meters of solar panels
(www.popsci.com)
This is a most excellent place for technology news and articles.
Given that is about $20k for panels panels on a home, and about $200k to convert a truck to electric.
Given the option of adding panels to 10 trucks, or taking another ICE semi entirely off the road, it seems like the latter is a much bigger win for the environment. ¯\_(ツ)_/¯