That has a lot of issues. So don&#x27;t trust their numbers.<p>EX: They use 10% for solar cell efficiency when some current systems are over 22%.  <a href="http:&#x2F;&#x2F;www.sciencealert.com&#x2F;panasonic-has-produced-the-world-s-most-efficient-rooftop-solar-panel-with-22-5-module-efficiency" rel="nofollow">http:&#x2F;&#x2F;www.sciencealert.com&#x2F;panasonic-has-produced-the-world...</a>  And lab results are even higher.