I think the author of the article has got either his numbers or the metric units quite wrong. 100,000 GWh = 100,000,000,000,000 (giga => x 10^9) which means it

I think the author of the article has got either his numbers or the metric units quite wrong. 100,000 GWh = 100,000,000,000,000 (giga => x 10^9) which means it's actually the 100 trillionth unit. And he repeats the mistake when saying "...and one hundred thousand million units of electricity has eleven zeros" - indeed it does but then 100000 million units is not 100000 G units. EDIT: Actually I'm the one who got it wrong. Apparently, electrical "unit" here is kWh not Wh, TIL.