Difficulty in understanding charge controller for solar and wind energy
Very crudely it will look like this:







simulate this circuit &ndash; Schematic created using CircuitLab

How it works


D1 to 6 rectify the three-phase current from the turbine to feed the "DC bus". If the turbine is running or voltage output from it is low D1 to D6 will be reverse biased and the battery can't discharge through the turbine windings.
The panel also feeds power into the DC bus. I've shown D7 to prevent discharging the battery through the panel. In practice it will be more complicated than that if the system optimises the power transfer from the panel.
SW1 and 2 can be switched by the controller to regulate voltage or power to the load and the battery charging current. Again, this is highly simplified but you would expect the controller to prioritise the load if input power is low and charge the battery when possible. When input power is lower than the load the battery will supply power. When battery voltage drops to a preset low limit the load should be automatically disconnected.


The same design could be achieved using your terminal arrangement and connecting all the '+' terminals internally. They saved two terminals doing it this way!