Model: mppt5012a-duo (12a) , mppt5025a-duo (25a) Solar charging controllers for camper Charge modemppt System voltage12v Battery numbertwo battery charging ports Battery typegel, lead-acid, agm2, lifepo4 Application 1.For camper, caravan 2.Self-contained solar systems 3.For boat 1. Increased mpp charging current compared with conventional controllers, due to ultramodern controller technology (microprocessor)by 10 % to 30 % (efficiency > 95 %) 2. Switchable characteristic lines of charging for optimum charging of gel/dry fit/agm/fleece or acid/lead-acid, as well aslifepo4 batteries . 3. Two battery charging ports: automatic charging of the main battery or board battery (board i): Support charging and trickle charging (max.1 a) of the vehicle's starter battery (start ii) with overcharge protection 4. Unattended charging: standard protection against overload, overheating, reverse battery and back discharge of the battery(in case of insufficient solar power, such as at twilight, at night etc.). 5. Overcharge protection: reduction of the charging current of the battery in case of excessive solar power and full battery. Immediate recharging in case of power consumption to ensure always the best possible charging state of the battery. 6. Connection for temperature sensor , automatic adaptation of the charging voltage to the battery temperature. Incase Of low outside temperatures, full charging of the weaker battery is improved, and in case of summery temperature sun necessary battery gassing will be avoided. This is highly recommended, if the battery is exposed to strong variations in temperature, such as in the motor compartment. -