Woa! Having just published a blog on the benefits of storage as captured in the UK Smart Power report, I came across this blog from Bill Gates.
I dont disagree with the title – it certainly is difficult to store energy; but I do disagree with his maths. He states:-
“This figure is based on the capital cost of a lithium-ion battery amortized over the useful life of the battery. For example, a battery that costs $150 per kilowatt-hour of capacity with a life cycle of 500 charges would, over its lifetime, cost $150 / 500, or $0.30 per kilowatt-hour.” Bill.
I have two difficulties with this, one of which makes his numbers worse and one makes them better. Read more…