Types of Batteries for Photovoltaic Systems

For cost, durability, longevity the equation keeps coming out traditional lead/acid.

I'm willing to be corrected, but to my mind that is the choice.

Within that technology one still has choices, I don't know if submarine batteries are still available, but a good quality deep cycle marine battery will go to zero with less damage, more often then typical auto batteries off the shelf.

Depending where you are, golf cart batteries can be available, larger and harder to handle, they are very rugged and also designed to go to zero charge regularly.

Link to previous discussion here.