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Pretty sure solar panels are 20% plus now with some much higher.

That will be average efficiency, because during night solar panels usually don't work, unless you live in Spain https://www.nationalreview.com/planet-gore/scandal-solar-pow...

Just did a Google search. Most cells which are actually produced are 10-11%.

Most residential deployments are near 20% or higher.

Good call, doing the search with those keywords yielded similar results