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Nuclear And Nonsense: An Insider’s Guide On Making Renewables Work
By Terry Leach on January 4, 2016
https://newmatilda.com/2016/01/04/n...e-explanation-on-how-to-make-renewables-work/
The numbers
So let’s do the maths. We currently spend about $6 billion each year on the grid that services the National Electricity Market with 9 million customers. That’s $666 per customer. Most of that cost is about meeting peak demand. So when batteries that last 5 years drop to about $3,300 to meet the storage needs of the average customer, the grid (in its current form) becomes uneconomic.
So battery prices need to reduce by about 55 per cent from the current $7150 quoted by Russell. To put that in context, solar panels reduced in price by 60 per cent between 2011 and 2014.
In a few short years, giga-battery factories are going to be springing up just as quickly as coal mines and oil refineries are shutting down.
How to charge
But how to charge those batteries? My household uses about 10 KWH (kilowatt hours) per day in winter. While a 10KW solar system will produce on average 42 KWH per day, it will still produce 10 KWH on the most miserable of winter days, even on a south facing roof. I can fit over 15 KWs of panels on my small house.
I can buy enough solar panels to provide my own electricity for the next 25 years for $10,000, today. And as long as the grid survives, those panels would feed in three times as much energy as I use.
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