PWM solar controller

MPPT solar controller

picture

Size precise

420*342*175mm、11KG

500*384*228mm、28KG

efficiency

75-80%

99%

working principle

The electrical structure of the PWM controller is simple. The controller consists of a power main switch and a capacitor, as well as the driver and protection circuit. The output voltage is controlled by the PWM duty ratio of the switch tube. Three stages of charging management of the battery. Fast charging, ordinary charging, and floating charge three stages to prevent the battery from being damaged by the battery.

Because the circuit principle of the PWM controller is only one switch link between the photovoltaic board and the battery, the battery battery port during the charging process will force the photovoltaic board output voltage to the close to the battery voltage. The voltage has deviated from the maximum power point voltage of the photovoltaic board, so it will lose some photovoltaic power generation power and reduce the efficiency of power generation.

Therefore, the PWM controller does not have the maximum power point tracking. When designing the system scheme, the photovoltaic board voltage and battery voltage matching should be appropriate. The photovoltaic board voltage should not be too high. Excessive photovoltaic voltage will be pulled down by the battery, resulting in the photovoltaic board power of power. Pull down and reduce efficiency.

The working voltage of the photovoltaic board is generally 1.25-1.4 times the rated voltage of the battery.

The solar controller of the MPPT controller's most advanced technology, compared with the PWM controller, it has more power inductance inductance and power switch capacitors. The efficiency is higher, and the efficiency of the PWM controller is increased by 20%-25%.

Because the maximum power point output of photovoltaic board is affected by factors such as ambient temperature and light conditions, this maximum power point is real -time change. Therefore The maximum photovoltaic power outputs in real time to improve the efficiency of system power generation.

The MPPT controller has high efficiency advantages and also has the advantages of width voltage input. As long as the photovoltaic input voltage is met in the maximum input voltage range allowed by the controller, the MPPT controller can scan the maximum power point of the photovoltaic board, and the system configuration is more flexible. The input voltage range of the PWM controller is narrow, and the input voltage is too high to cause low system efficiency.

Our company's MPPT photovoltaic controller supports up to 850V photovoltaic input. The range of photovoltaic input voltage is:

Minimum input photovoltaic voltage: VMP (working voltage) ＞ 1.3 times the rated voltage of the battery

Maximum input photovoltaic voltage: VCO (opening voltage) <850V

As long as the photovoltaic input voltage is within this range, the controller can track the maximum power of photovoltaic in real time.