Described herein are apparatuses, systems, and methods for a modular solar battery (MSB). The MSB may include a solar shell that includes a solar cell, a rechargeable battery that is charged by the solar cell, and control circuitry coupled to the solar cell and/or the rechargeable battery. The MSB may be in the form of a commercial battery. The control circuitry may include circuitry for solar power optimization, information sharing, battery charging, and/or battery health monitoring. The control circuitry may include a communication circuit to communicate information about the MSB to an external device. Other embodiments may be described and claimed.