Unbound Solar's Crown battery banks include the Crown CR430 flooded batteries, #4/0 AWG battery interconnect cables, stainless hardware and a refractometer for checking battery specific gravity. Crown leads the industry in quality due to their commitment to R&D and advanced, state-of-the-art assembly plant in Fremont, Ohio. Crown Battery has the most advanced, highly-automated assembly line in the industry and a quality-focused design. The CR430 flooded batteries also include Water Miser caps.