Ken Fabian Posted almost 3 years ago Solving the Energy Crisis; Solar Harvesting Satellites I wouldn't like to see those Big Ideas like Space Power Satellites dropped from all consideration. Something like a global grid, using beamed power, with or without orbital solar seems worthwhile to look into for longer term solutions. I suggested beaming power over and around because I think the scale of infrastructure for full orbital solar will be prohibitive. The smaller beamed power grid would still be huge, involving massive upscaling of space launch infrastructure and vehicles. It could be a compromise that might be more achievable. I don't know what the limitations of beamed power are and it could be that the transmission losses would make retransmission unworkable; I haven't encountered serious discussion along those lines. But I suspect it won't be the massive projects of that scale that give us our solutions, rather it will come from the accumulation of smaller (relatively) changes. Here in Australia the total of rooftop solar has far exceeded the capacity that's come from large scale dedicated solar farms, despite the latter's potential to include thermal energy storage. Rooftop solar has impacted the total supply sufficiently to cause some fossil fuel plants to be dropped. Wind has added a lot of global energy capacity without, so far, exceeding the capacity of grids to cope. There will be a point where they can't cope but it's not like this is a surprise. What is a surprise is the relative lack of R&D&D efforts to pre-emptively deal with it; grid operators here have resisted that kind of planning and investment and still appear to be working on the basis of future demand met by fossil fuels. The requirement to remake energy infrastructure to be low emissions is still being treated as optional. Worse, not doing so at all is being treated as the preferred option. I haven't looked in depth at Hoffert's efforts but I was impressed that he has not limited himself to championing a single, one size fits all solution.