1.1 Product Overview and Features

The SUNCON series is a solar controller with two load outputs, which incorporates the latest design concept. The solar charging controller is the main body, and the load has two outputs, which can output a DC voltage of 12V/24V, and can flexibly switch the output voltage level through a dip switch. The controller adopts advanced MPPT control algorithm to minimize the maximum power point loss rate and loss time, ensuring the maximum power point tracking efficiency, corresponding speed, and DC/DC conversion efficiency of high and low power ranges. This enables fast tracking of the maximum power point of the photovoltaic array in any environment and obtaining the maximum energy of the solar panel. Compared with the ordinary PWM charging method, it can improve the energy utilization rate of the solar system by 20% -30%. At the same time, it has dual functions of charging current limit and power limit, as well as automatic power reduction function for high-temperature charging, fully ensuring the system stability of the product when connected to excess photovoltaic modules and operating in high-temperature environments. The solar controller has an adaptive three-stage charging mode controlled by digital circuits, which effectively extends the life of the battery, improves system performance, and has comprehensive electronic protection functions such as overcharging, overdischarging, PV, and battery reverse connection, effectively ensuring safer, more stable, and longer lasting operation of the solar power supply system. This product has two constant voltage output power supplies that can be freely switched to 12V or 24V, and the output is turned off in stages according to the battery voltage to ensure that the main equipment works for a long time. At the same time, the two circuits use high-efficiency conversion circuits, greatly reducing the ineffective loss of the battery and effectively improving its usage time. It is most suitable for application in the field of security monitoring and can also be widely used in multiple fields such as RVs and household systems. characteristic:

Using high-quality, low loss efficiency devices (ST, TI, and Infineon) to ensure the product's lifespan

Excellent MPPT maximum power point tracking technology, with tracking efficiency not less than 99.5%

The unique circuit design enables high DC/DC conversion efficiency in both high and low power ranges, reaching up to 98.5% ★ and a full load efficiency of 97.2% ★

Advanced MPPT control algorithm ensures the minimization of maximum power point loss rate and loss time

Accurate identification and tracking of multiple peak maximum power points

A wider range of maximum power point operating voltage to improve the utilization rate of photovoltaic modules

Supports multiple battery types including rechargeable and lithium batteries, with adjustable temperature compensation coefficients

Equipped with automatic power reduction function for ultra-high temperature charging

Two constant voltage load outputs with freely adjustable voltage levels, especially suitable for voltage sensitive load devices

The two load outputs have different cut-off voltage points, and cut-off voltage points can be set to ensure that critical equipment is not powered off

Support battery free mode, where the photovoltaic directly supplies power to the load ①

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It has two working modes: optional charging priority and load priority, and can choose to prioritize charging the battery with photovoltaic modules or supplying power to the load.

In load priority mode, intermittent power supply can be selected to effectively extend the working time of main equipment

Adopting a common negative electrode design, it can be applied to various negative electrode grounding systems

It can be connected to an external remote display unit, Bluetooth module, WIFI module, and PC upper computer to view real-time device operation data and status, and can also support changes to controller parameters.

Equipped with battery board short circuit protection, charging overcurrent protection, load short circuit protection, load overload protection, battery open circuit protection, over temperature protection, TVS lightning protection, etc. Complete electronic protection function

① When the power of the solar panel is greater than the load power, the load can work normally, and the load power should not change dramatically.

3. Installation instructions

3.1 Installation precautions

Be very careful when installing batteries. For the installation of open lead-acid batteries, wear protective goggles. If you come into contact with battery acid, please rinse with clean water in a timely manner.

Avoid placing metal objects near the battery to prevent short circuits.

During battery charging, acidic gases may be generated. Ensure good ventilation around the environment.

Outdoor installation should avoid direct sunlight and rainwater infiltration.

Virtual connection points and corroded wires may cause significant heating, melting of the wire insulation layer, burning of surrounding materials, and even fire hazards. Therefore, it is important to ensure that all connection heads are tightened and wires are securely fastened with zip ties to avoid loose connections caused by wire shaking during mobile applications.

Only lead-acid and lithium-ion batteries that meet the control range of this controller can be charged.

The battery terminals on the controller can be connected to either the same battery or a group of batteries. The subsequent instructions in the manual are all for the use of a single battery, but they also apply to systems with a group of batteries.

The system connection wires are selected according to a current density not exceeding 5A/mm2.

4.3 System Maintenance

To maintain optimal long-term work performance, it is recommended to conduct inspections of the following items twice a year.

Confirm that the airflow around the controller is not obstructed and remove any dirt or debris from the radiator.

Check if all exposed wires have suffered insulation damage due to sun exposure, friction with surrounding objects, drying, insect or rodent damage, etc. It is necessary to repair or replace the wires.

Verify that the indicator light is consistent with the device operation. Please take corrective measures if necessary to address any malfunctions or incorrect displays.

Check all wiring terminals for signs of corrosion, insulation damage, high temperature, or burning/discoloration, and tighten terminal screws.

Check for dirt, nesting insects, and corrosion, and clean as required.

If the lightning arrester has failed, replace it in a timely manner to prevent lightning damage to the controller or even other equipment of the user.