JuncTek Battery Monitor MQTT Controller
![Image](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjFG42mBAmlq5LmD3Ccw1viLzbASbqCzXOqzURd_sTV2-180nuld8CCojuaS2AanJejzZmKYTZflbXKboz9zss-FgE8TDr8OADw_gFsuGdaHbDp94I2Be9uxE9iKo-F6w3qBJNRU-gUCZJfSB34xFz-aPaJJ2zs1_sPB9hBUD4td-iZFQT9CqMdlVqMeQ/w640-h309/00-Selection_745.png)
I recently installed some 48 volt Lithium Iron Phosphate battery packs at the Ranch to replace the 9 year old Lead-Acid batteries that had started to fail. eg4-lifepower4-battery-48v-100ah These are rack-mount battery packs that are intended for powering computer servers. They are reported to work very well in an off-grid power system. The Problem I had a problem to solve before the upgrade, in that the old 48 volt inverter I had been using in our solar power system required a programming interface to change its operating parameters to match the new battery specifications. Unfortunately, the manufacturer wants over $400 for the required interface to make these changes. I am unwilling to pay this extortion money for a simple device that should cost less than $100. The communications protocol and interface is proprietary, so it would take a considerable effort to hack the interface. There are two sets of parameters in dealing with the inverter/battery connections: 1. The chargin