I have made this argument several times that capitalism literally solves the issue of solar panels if the market allows arbitrage and true dynamic pricing.

Good to see now a working example that capitalism is an excellent system of rewarding those who solve inefficiencies in markets

There were significant state subsidies and regulation changes to encourage home battery installation. That's a lot less "free trade" driven than the GP post indicates. Is that still capitalism being an excellent system?

a $3,000 battery subsidy is the opposite of free trade.