Here we have Storage vs Storage.

In the NREL Cost Report Pump Storage is in $ / kw for 10 hours – not $ / kwh

I don’t think storage cost is linear with the project but I am giving it the benefit of doubt. The efficiency percent measured is the average over 8 years of data.

Electric Power Research Institute has indicated, “scarcity of suitable surface topography that is environmentally acceptable is likely to inhibit further significant domestic development of utility pumped-hydro storage.” In other words: “it ain’t gonna happen”.

Construction and O&M is from the NREL Cost Report. Transmission costs can’t be ignored with Wind Generation.

This is part 3) of your three part upgrade. I am using the two same Gas costs with a Pulverized Coal Heat Rate.

I am using Heat Rate from the NREL Cost Report for NEW Pulverized Coal Units. A heat rate of 9370 is very generous for a plant with 40 years behind it. Heat balances I been on, and comments from people familiar with these units place the heat rates in the area of 10,500 to 11,000.

You were 33% efficient on Coal You are paying more per BTU You are less efficient now.

Sometimes it’s hard to recognize progress.

This is the elephant in the room (OR in the garage if you prefer to place it there). Solar power cost is zero if you already have it on the roof.

|| 6.4 kWh Battery with inverter $664 / kWh
|| $4250 / 6.4 kWh = $664 per kWh
|| 22% higher = $664 per kWh / $542 per kWh