Comment on How to design a sailing ship for the 21st century?parentComments−oftenwrong5yIt's a battery meter. solar.lowtechmagazine.com is a solar-powered website.https://solar.lowtechmagazine.com/about.html
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It's a battery meter. solar.lowtechmagazine.com is a solar-powered website.
https://solar.lowtechmagazine.com/about.html