Don't fall for the apple and oranges comparison and the dubious claims of 25 watts per square foot; unless proven under real and accepted standards, it doesn't mean much.
The only relevant metric for solar panels (and cells) is efficiency... for a business it's the cost to produce versus the price it commands... for investors, it's
truthfulness or lack thereof.
Any efficiency above let's say 25% (for average domestic use) without a skyrocketting price tag would be great news, and EHT wouldn't be seeking
GoFundMe support or the Stockhouse
pump and dump crowd... they would be fending off cut-throat suitors instead.
So unless EHT wants to share credible and relevant numbers...
look for a better bet. Meanwhile, here's a chart that if you can't understand, then you shouldn't be allowed to play with money...
Solar Cell Efficiency Chart