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As an user, if you crunch the numbers then renewable energy never works out. The costs is just too high for now compares to the grid. The only system that is effective and with a short pay back period is roof top 'Hot water' system. If the 'feel good' factor is important then solar is OK.
As for provider, it gets very complicated. Transmission costs is high if you put it in the middle of no where to avoid the NIMBY issue. Or there is no back up when there is no sun/wind, i.e. oil/gas/coal/nuclear power plant is always needed.
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