Family Life What are 2V batteries used for? What are 2V batteries used for? In fact, 2 volt batteries are often used in RVs, boats, sizable ATVs, and other vehicles of significant size. This is especially true for cars, trucks, boats, RVs and ATVs that use solar power.Nov 16, 2020 Related Posts:How many batteries does a golf cart take and how long do they last?Amazon.com has a group 27 battery weight for deep cycle and electric trolling motor batteries.Are solar panels bad for your house?How do you hook up a solar panel to a golf cart?