1MPPT CHARGING TECHNOLOGY: 12V solar charger controller adopts MPPT charging technology, which can increase the charging efficiency of solar panel by 10%30% with the same power. 2INTELLIGENT DISPLAY: MPPT solar charger controller adopts intelligent display, which can clearly indicate the charging status, low voltage alarm, floating charge and full charge indication. 3DUAL BATTERY CHARGING: Solar MPPT controller can charge the main battery of the RV and the starter battery of the car at the same time, and the charging current of the starter battery is 1A. 4ALUMINUM ALLOY HOUSING: Solar controller is made of aluminum alloy housing with anodized surface, high strength, impact resistance, wear resistance and fire resistance. 54 BATTERY TYPES: Solar charge discharge controller has 4 types of batteries, plumbic acid, colloidal, AGM, lithium iron phosphate, to meet your different needs.