No comment on the solar side of things,....
But after reading some replies,
I can tell you, recently I fell through my single story house roof, (standard height ceiling 2.1/2.2m??)
I can tell you, you can still do some serious damage falling just that far.
A&E ,ambulance and numerous pain killers, anti inflammatory, ultrasound and x rays, its a bloody hard landing even from that height!!
Could've been much worse! (Lucky I can still write)