Since I wish you had spent the money differently, I need to compare your Existing Solar plus Battery with your new gas turbine.

The Solar takes 5.5 hours to charge the Battery and turn it into a Generator. The Gas Turbine is taking a nap. Then they both run for 18.5 hours. This is NOT how they should be used, but this gets me the same engineering units for comparison.

Concerning Transmission: the Solar being fed back into your system won’t get any further than the local transformer. The next door neighbor will use that energy. With Wind and with Solar Farms, that is not the case. Transmission can NOT be ignored.

They are NOT comparable in size but they now have common units. And industry has shown that economy of scale isn’t always guaranteed. Witness Comanche 3.

Using Google: Kiewit is the main contractor
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It’s at Cherokee
You are using 60% efficiency GE Combustion turbines,
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Nooter Eriksen Heat Recovery Steam Generators,
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and a GE low pressure turbine.
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I want to stress that the NREL Cost Report is GREAT It has ALL the technologies: Nuclear, Coal, Gas, Combined Cycle, Combustion Turbine, Geo-Thermal, Hydro, Ocean, Solar, Wind, And (believe it or not ) Other.

Just Google “NREL Cost Report” NREL is the acronym for National Renewable Energy Laboratory It is great reading Especially if you can't get to sleep.

This is the result of The Turbine Spec The Gas Price And the NREL Cost Report

This is capital and expenses for 30 years running 18.5 hours a day. And the bottom two lines say -- The project is gas price sensitive. (Which you already knew.)

This is the combination of Solar WITHOUT Capital and Battery WITH Capital and Expenses.

The $4.10 / MWh is Battery Expense
The see the calculation in the comments section of Screen 3