Sure, there are serous doubts about whether you can make enough electricity from capturing diffuse natural energy to power the economy since the ability to capture diffuse natural energy comes from a hydrocarbon source.
Hydrocarbons are in fact one of the most efficient natural batteries available and yet we burn them to make batteries that last 20 years, are less efficient by many orders of magnitude, are mostly toxic, and ultimately non recyclable without an external power source.
You cannot make batteries from batteries. Elon musk and his crew are using the last of the natural energy surplus to create even more toxic waste, at a large personal profit.
And we keep on using our energetic surplus on constructing hydrocarbon dependent infrastructure as if we had an infinite supply of a fuel which we already know is finite and will run out!
Ask the NRMA how much liquid fuel Australia really has in surplus:
https://www.mynrma.com.au/images/About-PDF/Fuel-Security-Report-Pt2.pdf<
And Yehuda, he’s your Okeechobee
https://www.theguardian.com/vital-signs/2015/jun/10/tesla-batteries-environment-lithium-elon-musk-powerwall
Ceteris Paribus 