If you built a solar farm last year, build another today, and another one next year, the cost for those will be seen on a sharp downslope. There would be no ne

If you built a solar farm last year, build another today, and another one next year, the cost for those will be seen on a sharp downslope. There would be no need ever to pay spot market price: you operate when you have power to operate. You could put up wind turbines too if you wanted to operate more regularly. In any case you can't buy these things yet. All costs are necessarily referred to a time when they are available off the shelf.