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I'm not sure where you are getting the 250-300W/m2 of irradiance. The standard value used in all solar industry calulations is 1000W/m2, but in practice, you should expect to see 8…

The Kaufmann report was published in 2012. At that time, both companies looked like VC darlings.

You can try Aliexpress.com. They have buyer protection.

I was part of the founding team of a power electronics startup. We constantly tore down our competitors' products to estimate their costs, to see how they corrected design flaws be…