focus;
I might suggest that you focus on what he said. He gave all the info you need to get you started on a plan. You need other info besides what you need in KWH.
Your question really has no answer unless you have more information to offer on exactly what you are trying to accomplish [in detail].
Might be a good idea to do some reading.
That web page is his signature, not the answer to your question.
Some folks should just give money to the pros to get it done. You will need to spend a tad more effort to save that 150 grand beyond posing the question here.
You might think this is mean or nasty but the stone cold fact is you provide nowhere near enough information to get a useful answer.
None of this is rocket science but it is a bit technical and your initial post shows you need more knowledge of electrical power and energy in general.
Good luck figuring it out.
Tom
"Education consists mainly of what we have unlearned."--Mark Twain
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