Pila is a first-of-a-kind modular, plug-in home and building battery system that combines energy storage, power control, and local intelligence into a unified platform. Each 1.6 kWh unit installs in minutes through a standard outlet, eliminating the need for rewiring or professional installation. The batteries form a patented mesh network that coordinates distributed nodes across a building, providing seamless backup power, appliance-level monitoring, and load management. Designed for scalability, the system can expand from a single unit to hundreds, serving homes, multifamily residences, or small commercial sites – rented or owned. Beyond resilience, Pila integrates with existing solar, smart meters, and grid signals to enable demand response, time-of-use optimization, and service-upgrade avoidance. Its infrastructure-grade design incorporates safe lithium iron phosphate cells, bidirectional power electronics, revenue-grade submetering, and edge compute for real-time control and edge-AI. Pila represents a new approach to behind-the-meter storage, making intelligent energy management accessible to all.