Non-Stop Power Where the Sun Shines VIGI Intelligent Solar Power Supply System. Customized Product Portfolio; Intelligent Auxiliary Heating Technology, the built-in smart battery supports intelligent auxiliary heating technology, which allows the battery to operate normally across a wide temperature range. High-Efficiency Solar Panel. MPPT Controller Boosts Charging Efficiency. An MPPT (Maximum Power Point Tracking) controller optimizes solar panel power, reduce power losses, and increase charging efficiency by 20% compared to PWM (Pulse Width Modulation) controllers.