1.System voltage
System voltage is also called the rated operating voltage, refers to the solar power system DC operating voltage, voltage is generally 12V and 24V, medium and large power controller can be 48V, 110V, 220V
2.Maximum charge current
The maximum charge current is the maximum current output of solar cell components or square, according to the size of the power is divided into 5a 6a 8a 10a 12a 15a 20a 30a 40a 50a 70a 100a 150a 200a 250a 300a and other specifications. Some factory instead of the maximum power of the solar cell components to express this, indirectly reflects the maximum charging current.
3.Solar array input channels
Small power solar controller is usually a single input, while high power solar mppt charge controller is composed of solar cell array multiple input, general high power solar controller can enter the 6 channels, the most accessible 12 channels, 18 channels.
4.Circuit loss
Circuit loss is also one of the main technical parameters, is also called the no-load loss (quiescent current) or the maximum self consumption current. In order to reduce the loss of controller and improve the conversion efficiency of solar power, the circuit loss should be as low as possible. The maximum circuit loss of the controller shall not exceed 1% or 0.4W of the rated current, generally is 5~20ma.
5.Overcharge protection voltage of battery
The battery overcharge protection voltage is also called full disconnection or overvoltage shutdown voltage, can according to the needs and different types of batteries, set in 14.1~14.5v (12V), 28.2~29v (24V) and 56.4~58v (48V), the typical value is 14.4V, 28.8v and 57.6v. Battery charging protection shutdown recovery voltage is generally set to: 13.1~13.4v (12V), 26.2~26.8v (24V) and 52.4~53.6v (48V), the typical value is 13.2v, 26.4V and 52.8v.
6.Over discharge protection voltage of battery
Over discharge protection voltage of battery is also called undervoltage disconnect or undervoltage shutdown voltage, generally can according to the needs and different types of batteries, set in 10.8~11.4v (12V), 21.6~22.8v (24V) and 43.2.~45.6v (48V), the typical value is 11.1v, 22.2v and 44.4v. The battery over discharge protection shutdown recovery voltage is generally set to: 12.1~12.6v (12V), 24.2~25.2v (24V) and 48.4~50.4v (48V), the typical value is 12.4V, 24.8v and 49.6v.
7.Battery floating charge voltage
Battery floating charge voltage is 13.7v (12V), 27.4v (24V), and 54.8 (48V).
8.Temperature compensation
The controller generally has the function of temperature compensation, in order to adapt to different working environment temperature, battery charging voltage setting is more reasonable, the temperature compensation coefficient of the solar MPPT controller should meet the requirements of the development of battery technology, the temperature compensation value is generally -20~-40mv/oc.
9.Working environment temperature
The use of the solar controller or the working environment temperature range varies with the manufacturer generally between -20~+50oc.
SOROTEC Solar MPPT Charge Controller 60A 3200W 12V 24V 48V
