Why don't panels come with ground bars?
I bought a sub panel last summer. I had to buy and install a ground bar kit. Time after time I read careful instructions here to buy and install a ground bar, mount it with machine screws, and if a main panel, bond it to the neutral. Where would you use a panel that doesn't need an equipment ground? The only thing I have in my panel or subpanel that doesn't have an equipment ground, is the whole house surge protector. It came with only a white wire and instructions to connect it to the neutral bar. My pump and A/C don't have neutrals, but do have grounds.