"This slide shows the enormous cost of using 100 percent renewable energy with battery backup in California. You’ll notice that the cost of electricity increases exponentially as renewable and battery storage penetration increases to $1,612 per megawatt hour ((MWh) compared to an average system cost of $50 per MWh today.

What would this mean for families in Minnesota, if we assume that achieving a grid powered by 100 percent wind, solar, and batteries...
If we just use the wholesale cost of $1.60 per kilowatt hour and ignore the factors in the retail costs, electricity prices would be 11 times higher than the current price of electricity for residential customers Xcel Energy’s service territory. This means the average Minnesota household with Xcel as their energy provider using 648 kilowatt hours per month would see their average monthly bill increase from about $91.30 to $1,036.80, or more than $12,000 per year..."
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