EVs alone have major grid balancing potential. You can get home batteries for under $100/kwh in US right now, and cost of EV batteries have always been lower due to bulk/contract purchases. At $100/kwh, even from grid TOU use power, you can time shift profitably for just 1c/kwh before financing costs, but before resilience/backup benefits from batteries.

Solar is by far the cheapest way to charge those batteries, where home solar without monopoly persecution from utilities, as in Australia, can be extra affordable. But even before abundant solar is permitted in our countries, or even net metering, simply having TOU rates that are cheap at night allows for enough arbitrage for when TOU rates are high. Where some EVs are $300/kwh to $500/kwh for the entire car, TOU rates can allow for arbitrage that pays for whole car.