You said "On top of that batteries are not very efficient, at least not at the rate one woumd hope for or expect in an emerging technology." The expectations in an emerging technology are that they are rapidly improving, not that they are already better. This is, frankly, absurdly simplistic analysis. Solar and wind are still highly useful even without storage. Again, as I pointed out, it requires diversification currently. Generation costs are already lower. So, given the dramatic fixed costs in developing other forms of electricity generation, solar and wind, with their lower and still declining costs of generation, actually make the most sense for most new construction projects. This is especially true given the rates at which storage prices are falling. As that occurs, other generation techniques can be further limited.