Solar and wind cannot produce a sustainable level of voltage to power large or small appliances and electricity cannot be stored for a period of time long enough to tide over the whims of mother nature.

Solar and wind is also subsidized to the hilt with no end in sight- in the current government approach, it will never cover it's costs. The sunniest place on Earth, southern Spain cannot make a go of solar.

Never mind asking manufacturers about trying to run their heavy machines with sunshine and a breeze, just ask the average cottager.