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Advantages of MPPT solar controller | Disadvantages of MPPT solar controller

This page covers advantages and disadvantages of MPPT solar charge controller. It mentions benefits or advantages of MPPT solar controller and drawbacks or disadvantages of MPPT solar controller.

Introduction:
There are two types of solar charge controllers viz. PWM and MPPT. These charge controllers are designed to regulate flow of current to the battery from solar panel or array. The main functions are to prevent battery from over-charge and to prevent it from deep discharge.

What is MPPT solar controller?

The optimal ratio of Current (I) to Voltage (V) in the power curve of a PV panel to generate most power is known aa MPPT i.e. Maximum Power Point. MPPT curve varies based on irradiation conditions.

MPPT offers indirect connection between PV panel and battery as shown in the figure-1. It functions as DC to DC voltage converter. It is suitable when battery voltage is less than the PV panel array output. MPPT utilizes extra PV voltage of solar array to generate extra current at low voltage without loss of power. This increases efficiency of the solar system.

MPPT solar charge controller

DC to DC converter are of two types buck converter and boost converter depending upon output voltage is greater or less than the input voltage. When output voltage is less than the input voltage buck converter configuration is used. Refer Buck Boost converter >> for more information. Refer difference between PWM and MPPT >> solar charge controllers.

Following are the typical specifications of Luminous MPPT solar charge controller.
• Model Solar PCU - NXT+ 3.75 KVA
• Maximum panel power supported : 3000 Wp, Maximum power voltage Vmp (V) : 65 to 130 V
• Nominal battery bank voltage : 48 V
• Input voltage Range (Voc) : 80 V to 165 V
• VA rating : 3.75 KVA

Benefits or advantages of MPPT solar controller

Following are the benefits or advantages of MPPT solar controller:
➨It is more efficient compare to PWM solar charge controller.
➨It can optimize voltage differences and offers DC load optimization.
➨It is ideal for larger systems where solar panel output is substantially greater than battery voltage.
➨It offers more output and hence more capacity (Amp).

Drawbacks or disadvantages of MPPT solar controller

Following are the drawbacks or disadvantages of MPPT solar controller:
➨It is two to three times more expensive compare to PWM solar charge controller.
➨It is larger in size and hence difficult to handle.
➨It offers shorter lifespan due to more electronic components and more thermal stress.

Also refer advantages and disadvantages of Solar Electricity at home.



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