In Lab Secrets, Tesla Is Talking about 20-Year Lithium Ion Batteries 0919.rtf
For combustion turbine ¢/kWh, divide $/kW-mo by 20 hours/mo? For battery storage, divide by 40 hours? For ¢/kWh, divide $/MWh by 10.
Massachusetts Is Staring Down a Duck Curve of Its Own. Storage Could Help. 0418.rtf
- parallels to California; negative ¢/kWh
The top graph shows how a remote storage system works, as it is linked to renewable power generation. The purple area is the key. When it is above the line, it is charging from excess wind and solar generation, when it is below the line, it is discharging to make up for the lack of renewables.
Notice in the bottom graph how it smooths out the frequency issues for the local grid, which should operate at or close to 50 hertz. The load, in gray, changes little from minute to minute.
http://reneweconomy.com.au/2013/the-battery-storage-system-that-could-close-down-coal-power-38259 - from Bloomberg New Energy Finance in late 2016
Graph at bottom is from Bloomberg New Energy Finance, New Energy Outlook, June 2016
Section Map: Energy Use