The XTRA series are advanced charge controllers (MPPT) for systems off-grid photovoltaic systems, incorporate a display screen with the electrical information of the PV system. To maximize energy harvesting from PV arrays and simultaneously minimize energy loss within a wide range of operating conditions, the XTRA series applies an intelligent algorithm advanced resulting in up to 30% more efficient charging, Compared to a PWM (PWM) charge controller. pulse) conventional. The IP32 protection seal and the isolated RS485 communication port further improve the reliability of the controller in different applications. The XTRA series controllers incorporate a three-phase charging algorithm. self-adaptive stages based on a digital control circuit that prolongs effectively battery life and significantly improves performance of the system. It also has extensive electronic protection for overcharge, over discharge and reverse polarity of the battery to ensure the durability of the off-grid solar system.