I am working on a Battery charging/monitoring system for a project I am working on(Personal) I am going to be monitoring a voltage from a snowmobile motor that is going to be rectified and used to charge a Lead Acid battery and also to switch between the rectified DC voltage directly from the motor amd the battery (When the Voltage level of the Direct rectified falls below a specific level) To explain in more detail I am using a Two cylinder 462cc snowmobile motor on a Dunebuggy and I am looking to control the electrical system (Running lights, brake lights, etc and adding some special functions) I am going to use a small PLC for most of the work but am not sure if I should just take the Voltage from the motor and rectify it and charge the battery and just pull all my voltage from the battery or have it able to switch all the electrical between the battery and the motor (keeping the PLC connected to the battery). I know it is sort of off topic but since I am using a PLC for some of the control and the fact that I know some of you control guys have used PLC's in a Battery power configuration you might have some Ideas of products or ways of going about it. Thanks in advance for the help