This is not the enrgy currecy of a plant. Sugar is. Sugar molecule breaking down releases energy - measured in heat per second (calories or joules etc..) All endothermic reactions require an energy input to form those products. Electricty does not power cell reproduction or growth.
This is very likely psuedoscience. You would not want to bet on it in vegas. It is technically impossible to disprove something. You can only prove a relationship or you cannot. so far there is no proof of concept. Existing knowledge pretty much precludes the possiblity, but as i said, the responsibility of proof is on the person putting forth a hypothesis. If they don't do that work, it's very likely it's just magic to be sold to rubes, like 99% of the dietary suplement market.... that stuff is more likely to damage livers and kidneys than live up to the promises, lol, but people spend billions on it. So, popularity is a very poor reason to beleive in anything.
And, nobody has ever successfully turned lead into gold in any useful way or at any scale. Though, they did with the large hadron collider.
An element, like gold, is a matter of how many protons are in the nucleus. To convert Pb to Au you have to remove 3 protons (82 vs 79 on periodic table), which is not something you can simply do and there are no known processes to do so. this was been a pipedream of alchemists back in da vinci times, lol. This cannot be achieved through any normal chemical process.
https://www.scientificamerican.com/article/large-hadron-collider-physicists-turn-lead-into-gold-for-a-fraction-of-a/
Ah, they did it for a fraction of a second, but it has never been done before and we are talking about a handful of atoms for a fraction of a second, lol. If we can ever competently transmute elements into other elements, it's not happening anytime soon, lol.