We usually need a solar controller for our power system term for solar, wind, hydro as it is essential to protect battery.
Wellsee company is mainly manufacturing various solar controllers, charge controllers,solar regulators,lighting controllers and mppt controllers, the functions are as below,
Automatic recognition of input voltage
Applying with various types of durable batteries
Micro processing controller Pulse Modulation Wide-frequency PWM charge
Setting the voltage of low voltage cut-off/resuming connection of the DC output of the load port
Temperature sensor for charging a battery in compensation
Protective circuit of PV from reverse-charging.
Overload protection
Overcharge protection
Short circuit protection
The temperature compensate
Reverse polarity connection protection
Converse discharge protection
Thunder protection
Low voltage protection-Low Voltage Disconnect (LVD)
Automatic recognition of input voltage
Wellsee solar controller is 12v/24v automatic recognition of input voltage: all solar controller which is used for 12v system also can be used for 24v system, the solar controller will automatically distinguish and work properly.
Applying with various types of durable batteries
Wellsee solar controllers are suitable for various types batteries, such as lead-acid battery, gel battery, also for Li batteries.
Micro processing controller Pulse Modulation Wide-frequency PWM charge
Wellsee solar controllers regulate the flow of energy of the battery by PWM (pulse width modulation), it can make solar controllers work well.
A PWM controller holds the voltage more constant. If it has two-stage regulation, it will first hold the voltage to a safe maximum for the battery to reach full charge. Then, it will drop the voltage lower, to sustain a "finish" or "trickle" charge. Two-stage regulating is important for a system that may experience many days or weeks of excess energy (or little use of energy). It maintains a full charge but minimizes water loss and stress.
Setting the voltage of low voltage cut-off/resuming connection of the DC output of the load port
Wellsee solar controllers with LCD display (WS-C2430,WS-C2460,WS-C4860) can set parameters by yourself, such as the full charge cut voltage, low voltage cut voltage and automatic restoration voltage.
Temperature sensor for charging a battery in compensation
Wellsee solar controller has temperature compensation functions, when the controller senses a low battery temperature, it will raise the set points. Otherwise when the battery is cold, it will reduce the charge.
If the temperature sensor of a solar controller is inbuit, the controller must be mounted in a place where the temperature is close to that of the batteries.
An alternative to automatic temperature compensation is to manually adjust the set points (if possible) according to the seasons. It may be sufficient to do this only twice a year, in spring and autumn.
Protective circuit of PV from reverse-charging.
Photovoltaic panels work by pumping current through your battery in one direction. At night, the panels may pass a bit of current in the reverse direction, causing a slight discharge from the battery. The potential loss is minor, Wellsee solar controller can easy prevent it.
In most controllers, charge current passes through a semiconductor (a transistor) which acts like a valve to control the current. It is called a "semiconductor" because it passes current only in one direction. It prevents reverse current without any extra effort or cost.
Overload protection
Wellsee solar controller has overload protection, the controller will stop working when overloading. A circuit is overloaded when the current flowing in it is higher than it can safely handle. This can cause overheating and can even be a fire hazard. Overload can be caused by a fault (short circuit) in the wiring, or by a faulty appliance (like a frozen water pump). Some charge controllers have overload protection built in, usually with a push-button reset.
Built-in overload protection can be useful, but most systems require additional protection in the form of fuses or circuit breakers. If you have a circuit with a wire size for which the safe carrying capacity (ampacity) is less than the overload limit of the controller, then you must protect that circuit with a fuse or breaker of a suitably lower amp rating. In any case, follow the manufacturer's requirements and the National Electrical Code for any external fuse or circuit breaker requirements.
Overcharge protection
When a battery reaches full charge, it can no longer store incoming energy. If energy continues to be applied at the full rate, the battery voltage gets too high. Water separates into hydrogen and oxygen and bubbles out rapidly. (It looks like it's boiling so we sometimes call it that, although it's not actually hot.) There is excessive loss of water, and a chance that the gasses can ignite and cause a small explosion. The battery will also degrade rapidly and may possibly overheat. Excessive voltage can also stress your loads (lights, appliances, etc.) or cause your inverter to shut off.
Preventing overcharge is simply a matter of reducing the flow of energy to the battery when the battery reaches a specific voltage. When the voltage drops due to lower sun intensity or an increase in electrical usage, the controller again allows the maximum possible charge. This is called "voltage regulating." It is the most essential function of all charge controllers. The controller "looks at" the voltage, and regulates the battery charging in response.