I think that old mate was trying to get a definitive it will power 100 typical houses for (say)17 minutes so he could put shit on the idea, you know we are spending all this money for afew minutes etc etc. Clearly they were sniffing for some anti sustainable fodder which is still why the video is out there. It should have been responded with the batteries are to fill the gap while other sources come on line and use the relevant data that way. Poor by both sides in my opinion.