Quote:
Originally Posted by MPaulHolmes
I was told by someone who went to a university talk about the grid that there's a theoretical limit to the percent of grid power that can be from solar grid ties. If it was over some percent, the grid would become unstable, and in practice, it was actually less than the theoretical percent. But the talk was about how the speaker had invented a way to build some inertia into the software, so it wouldn't have the same stability issues. I don't think it's used in general right now.
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The theoretical limit is 100% solar.
The issue with solar or wind energy feeding into our current electric grid is that the power generation is not consistent. Clouds shade panels and the wind doesn't blow at a constant speed. That compares to a gas plant where generation can be ramped up or down at will to meet the demand. The current grid doesn't have a way to store extra energy and feed it back when needed. There are ways to do this but right now we don't.