Battery pictures here A battery bank allows you to store electricity generated by your alternative power System for use at any time. The battery bank of any off-grid renewable energy power system is one of the most complicated and costly components in your installation. And it’s important to get it right. A battery bank can be composed of a single battery or multiple, interconnected batteries that work as one large battery at a required voltage and amp-hour capacity. At Wholesale Solar, we’ve put together 12V, 24V, 36 48 & 96Volts battery banks for use with most any application.