Solar batteries by Interstate Batteries. I changed my solar system power from 12vdc to 24vdc very easily. The solar array now has a 24vdc charge controller and a 24vdc battery storage system.
Video Rating: 5 / 5

Here are the last 14 panels installed for a total of 28 panels and 420w of solar going to the batteries. I wired the panels in strings of four panels in series, each panel is rated at 20v open circuit voltage so that is a total for 80v per string. Since I have 28 panels that is a total of seven strings in parallel. The Outback charge controller then converts it to 12v and charges the batteries with 95% efficiency which is pretty awesome. I still have room to add another 26 panels to this charge controller for a total of 800 watts.