switch with diode for solar system to switch between two batters but on charge one with solar panels. very simple concept of understanding. diode represents solar charger that is also able power led light hooked up . battery with diode will be a bigger batter with more ampere hrs for a reserve but is not to be charge by solar because solar charge is cheep and battery is of an agm type and the solar charger doesn't have an agm setting, only custom options that doesn't work for this specific battery. this is just an understanding concept for the builder. the second battery with no diode charges normal because it is a sealed lead acid battery and the charge controller can accurately charge it better then it can the agm.
