Batteries tend to burn instead of explode. Same energy, but released over much more time. And while an uncontained battery fire is a huge issue in a private home or in a car park because of how difficult they are to control, in a dedicated battery storage plant you can just let it burn down

It's not without risk, but as far as power plants go it's pretty low risk

The nearby nuclear power plant produced these 6 GWh every four and a half hours, 24 hours a day, 7 days a week and more than 8000 days of the year.

Would you like to run the same calculations for the (now decomissioned) nuclear power plant on the same site?

Or for that matter the average petrol or natural gas storage facility? https://en.wikipedia.org/wiki/Buncefield_fire ("Europe's largest peacetime explosion")

its about 21600 gigajoules or about 1500 tonnes of wheat.