Product 1: Optimized for 12V BatteriesCompatible with 12V battery banks on the market, including lithium batteries. The LED indicators allow you to set battery types and check the charging staus with ease. Product 1: Smart 4-Stage PWM ChargingSmart 4-Stage PWM charging (Bulk, Boost, Float, and Equalization) increases battery life and improves system performance. Intelligent protection against reverse polarity, overcharging, short-circuit, and reverse current. Product 1: Compact in sizeWhich makes it easy to install virtually anywhere. Product 1: Multiple battery adaptation Deep Cycle Sealed (AGM), Gel, Flooded and Lithium battery option ready. Product 2: Renogy mounting Z brackets are very easy to use, unique designed, and perfect for irregular surfaces Product 2: All parts you need to mount your panels to roof/wall are included in this product. Product 2: They are composed of aluminum material and are light weight. Product 2: Use them to mount your panels to recreational vehicles or boats.Product 1: Optimized for 12V BatteriesCompatible with 12V battery banks on the market, including lithium batteries. The LED indicators allow you to set battery types and check the charging staus with ease.Product 1: Smart 4-Stage PWM ChargingSmart 4-Stage PWM charging (Bulk, Boost, Float, and Equalization) increases battery life and improves system performance. Intelligent protection against reverse polarity, overcharging, short-circuit, and reverse current.Product 1: Compact in sizeWhich makes it easy to install virtually anywhere.Product 1: Multiple battery adaptation Deep Cycle Sealed (AGM), Gel, Flooded and Lithium battery option ready.Product 2: Renogy mounting Z brackets are very easy to use, unique designed, and perfect for irregular surfacesProduct 2: All parts you need to mount your panels to roof/wall are included in this product.Product 2: They are composed of aluminum material and are light weight.Product 2: Use them to mount your panels to recreational vehicles or boats. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.