Author Topic: Bill Gross Keynote at DLD Munich 2019 on cheap gravity energy storage  (Read 1935 times)

Cardboard

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Re: Bill Gross Keynote at DLD Munich 2019 on cheap gravity energy storage
« Reply #20 on: February 27, 2019, 02:18:47 PM »
A 10% efficient storage system will mean that 90% of what was produced has been lost. It means that you will need 9 times more renewable generating capacity to end up with the same output as you would with the 90% efficient system. That is a lot of additional c/kWh!!!

I get the point but, your example is out of whack.


Spekulatius

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Re: Bill Gross Keynote at DLD Munich 2019 on cheap gravity energy storage
« Reply #21 on: February 27, 2019, 02:58:59 PM »
Indeed, in the end all that matters is the price. The efficiency is one of the factors that goes into the costs, but a 10% efficient system that could capture energy at 2c/kwh round-trip is better than a 90% efficient system that captures it at 3c/kwh round-trip.
A 10% efficient system they captured energy at 2c/kwh need and input of energy with a <0.2c/kWh cost to work at the given value.
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