With a presence in California, Arizona and Utah, Electric Power Systems (also dba EP Systems and EPS) spun out of a 45 year old Aerospace Company focusing on Electric Power systems for High Reliability Markets. The firm organizes around products are Energy Storage systems for propulsion systems that need to operate in a harsh environment. High power starter batteries for military and aviation up to 4000A, and mobile and stationary power backup batteries; full containment of worst case thermal runaway events, overcharge, overheat, short circuit, with all protection features disabled; Ultra-light weight Kevlar and carbon fiber drone propulsion packs with full featured battery management with isolation control, CAN communications, balancing and monitoring; Ultra-light weight Kevlar and carbon fiber drone propulsion packs with full featured battery management with isolation control, CAN communications, balancing and monitoring. The firm is experienced with features, advantages, welding, and packaging of all lithium-ion chemistries and form factors, including NMC, NCA, LFP, LTO in cylindrical, pouch, prismatic packages. Redundant, fault-tolerant battery management systems with continuous lab grade real-time logging of cell voltages, temperatures, current, balancing, modes of operation, faults and warnings to non-volatile event-survivable solid state memory.