A charge controller is essential to ensure the solar panel does not over charge the battery as well as prevent current drain. For solar panel/s up to 150W choose the 10Ah controller or above, up to 225wp panel/s choose 15Ah or above, up to 300wp a 20Ah or above and 450wp a 30Ah charge controller.
10Ah, 20Ah and 30Ah PWM (Pulse width modulation)
This is a method of reducing the average power delivered by the solar panel to the battery. Turning the electronic internal switch between supply and load on and off at a fast rate controls the charge getting to the battery.
15A MPPT (Maximum power point tracking) Pro
This is an electronic DC to DC converter which increases solar yield by up to 20% over a standard charge controller by artificially modifying the voltage from a solar panel system to actively match any battery's requirements. This means that whatever the conditions your panel will deliver maximum power with minimum electrical loss. The MPPT Pro comes with its own free-to-download Bluetooth app to display how the solar system is performing.
There is also the option of pairing the 15A MPPT Pro with a display unit to provide all the required information about the solar panel performance and the charge in the battery/ies. It connects directly to the charge controller with a 5m cable and connector (all supplied).