Is the future of residential batteries module-level micro-storage? Yotta Energy seems to think so. They’re offering a 52-pound, 1 kW-hr lithium iron-phosphate battery to be placed on the roof-mounted solar module racking gear that holds the ballast. The company sees this as an ideal solution for urban solar+storage systems. Their CEO states that the system “allows for the lowest installed costs for adding energy storage to any solar PV system. The ability to remotely design and conserve space opens up opportunities for more solar installers to incorporate energy storage.”