In our earlier battery management system (BMS) architecture, a single imbalanced module could take an entire string offline—stranding energy across every module it was grouped with. We engineered around it. Oversized systems to deliver performance. Dispatched technicians when it happened. Accepted the downtime. It was the cost of doing business. We decided it didn’t have to work that way. Eos DawnOS™ is the result. A module-level BMS, built from the ground up for zinc-halide chemistry. When a module falls out of balance, the system can route around the issue. The string keeps running. Energy loss stays under 1%. And because zinc is inherently resilient, most modules can recover on their own and reintegrate automatically. No technician. No downtime. That’s how installed capacity becomes usable capacity—and what five years of iterative development looks like. For Eos Cubes with Z3™ modules already in the field, DawnOS can unlock trapped energy. Hardware, firmware, and software upgrades working together to bring deployed systems to full performance. Full technical breakdown linked here: