$1T is really not that much money for the US.

Energy is 4.8% of US GDP, about ~$1T. So we already have $1T to spend on energy... It's just a matter of how we spend it.

This is just what things cost when you've got 335M people and most of them are relatively rich from a global perspective.

The world will spend in the neighborhood of $1Q on energy in the next century.

Right, but we don't yet see this projects happening, and it might be time that they start happening. But how to talk people into that, when half of the USA thinks climate change is a liberal scam, I don't know.

How can you accurately project costs of grid-scale store 1 or 2 decades into the future? It is an industry that is just starting out and projected to grow quite large. Profits and manufacturing labor account for greater than 50% of the battery costs now, so there is a good bit of room for prices to fall as manufacturing ramps up and the market becomes more competitive.

You don’t need to be very accurate, because the cost of storage is enormous even if you’re off by factor of 5.

Try it yourself: start from here https://www.eia.gov/energyexplained/us-energy-facts/ and calculate how much it would cost to store one day of energy use in US.

Well, the salt formation in Delta, UT can store enough hydrogen for something like 30 hours of the average US electrical power consumption. IIRC, creating those ~100 storage caverns would cost in neighborhood of $10 B.

You can't, it was an order of magnitude napkin math calculation I did based on the cost of pump back hydro dams in china and the amount of energy storage you would need.

It is going to be in the trillions barring some radical revolution in storage that is unlikely given our breadth of knowledge of physics at this point. A lot of people think that Tesla Megapacks here and there are enough but those cover interruptions on the scale of minutes, not hours or days.