The 3 Best Batteries So now that we know we want a lead acid battery, that’s flooded (FLA), and also has deep cycle properties …here are our 3 favorite batteries for an off-grid system’s battery bank: So, here are the categories of flooded lead-acid batteries that are best for an off- the-grid power system: 1) Golf Cart Batteries Golf cart batteries are the most widely manufactured batteries on this list. They also work great in an alternative energy system application. So it’s no surprise that they’re one of the most commonly used batteries in battery banks for renewable energy systems. Even though the five to six year life span of golf cart batteries may seem relatively short, golf cart batteries more than make up for their deficiency in this area by being extremely durable and cheap (you can also use these 7 tips to extend the life of golf cart batteries). In addition, golf cart batteries can also be found almost anywhere, making them a great choice for battery banks. View our Free Presentation to learn how to bring old batteries back to life again