At least in California, the fire code doesn't allow you to have a bank of batteries without building a dedicated room with active fire suppression for them. You

At least in California, the fire code doesn't allow you to have a bank of batteries without building a dedicated room with active fire suppression for them. You need to prove (to your local fire department) that your array of batteries won't have a thermal runaway. So, conveniently, the F-150 is a tested, self-enclosed array of batteries :).