【Maximum 12 units in parallel】The maximum number of 60A mppt controllers that can be connected in parallel is 12 to increase the solar system's total capacity and improve the system's overall power output. This can better meet the needs of large solar systems while improving the reliability and stability of the system. In addition, paralleling is also conducive to system maintenance and management, making the system operation more flexible and efficient 【Dual Cooling, Efficient Heat Dissipation】The 60-amp charge controller is constructed with die-cast aluminum, ensuring excellent heat dissipation and reduced power consumption. Additionally, it features a silent intelligent bladeless fan for efficient cooling (activates at temperatures >45°C, turns off <40°C). The upgraded bladeless fan cooling system is quieter and more effective, making it suitable for use in RVs, commercial vehicles, boats, yachts, and solar systems 【Compatible with Multiple Type Batteries】Negative grounding design controller safer, 60a charge controller compatible with a variety of 12/24/36/48V batteries(lead-acid and lithium, User customize); Sealed, Gel, Flooded and LI (LFP) battery charging parameter pre-set, other battery can be customized charging parameter according to your need. User programmable Absorption Voltage / Float Voltage / Low Voltage Cutoff / Load Timer. Real-time energy logging. Recommended wire size: 9AWG 【Wide Range Voltage/Powe Support】60a solar controller supports High PV Input Power/Voltage. When in 12V battery (system): Suggest Solar power 720W, suggest range: DC20V~75V; 1440W 37~100V when in 24V battery; 2100W 50~155V when in 36V; 2800W 72-155V when in 48V 【99% Tracking Technology】MPPT Charge Controller with advanced Maximum Power Point Tracking technology can continuously track the array’s maximum power point to get the maximum power to charge the battery. The tracking efficiency is not less than 98.1% and the peak conversion efficiency is up to 97% 【Note】If you use sealed lead-acid, vented gel batteries, etc., you do not need to set any parameters, the controller can be automatically adjusted and work normally; but if you use lithium batteries, you need to adjust the parameters according to the actual battery voltage, because lithium batteries are unstable, for example, acid batteries 12V is 12V, while lithium batteries 12V may be 11.1V or 14.8V 【！】Please note that the PV input must be disconnected before setting parameters. If the solar controller displays night mode, please perform a reset using the following method: With only the battery connected to the controller, press and hold the last button for more than 5 seconds to restore the solar controller to factory settings. 60 amp MPPT Charge Controller 12V/24V/48V Auto, 60A Solar Charge Controller w/ LCD Display, Work with Lead-Acid and Lithium Batteries, Support 12(Max) Solar Regulator Connections in Parallel Please note that the PV input must be disconnected before setting parameters