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Switzerland authorizes removable PV plant on railway track
(www.pv-magazine.com)
This is a most excellent place for technology news and articles.
The cost of solar panels on a new build is extremely marginal for the long term benefits they provide to the owners of the house, the environment and the general electric grid. They should absolutely be a requirement.
They paid back in around 5 years on my moms roof, and that was 11 years ago, and panels are waaay cheaper now than they were back then.