We developed a Prototype of a super low-cost Environmental Sensor for an Energy Storage System (ESS) which also included an H2 gas sensor. The deployment was to monitor environment within ESS to detect dangerous off gassing. The sensor measured temperature, Humidity, Light, Vibration as well as H2 concentration. Using open API and protocols, a connected solution and a web-based monitoring dashboard were created. The cloud microservice provided data storage and Visualization. Using machine learning techniques, it analyzed data and generated notifications and alerts.