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MPPT- PWM Solar Charge Controllers

Solar Charge Controllers

Charge regulators / solar regulator

The charge regulators are devices that use two basic functions within the solar installation, on the one hand it controls the charge level of the batteries and on the other hand it regulates the intensity of the load so that it is adequate according to the type of battery used. the solar installation.


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The main objective of the charge regulators is to extend the useful life of the batteries, so it is an essential complement within the solar installation because it serves for the link between the solar panels and the batteries controlling their charge and the intensity level of the batteries. the energy, which comes from the solar panels in order to achieve its objective. In addition, charge regulators are surge and load surge protectors.

Types of MPPT and PWM charge controllers

PWM load regulator: PWM load regulators are those that only comply with the basic functions of charge regulators, this type of regulators only cut off the power when they detect that the batteries are at maximum capacity.

Characteristics of the PWM charge controller

With the PWM charge controller it is necessary that the solar panels and batteries match voltage. That is, if the output of solar panels is 12v and we have 12v batteries, we need a PWM charge controller, if we have 24V batteries and 24V solar panels, we have a PWM charge controller and if we have 48V batteries and panels solar 48 we need a PWM charge controller.

Limitations of photovoltaic field power higher than MPPT load regulators. That is to say that we have 2 solar panels of 260w we add the powers and it would be 520w, in this way the PWM load regulators support better the output power of the photovoltaic field.

Characteristics of the MPPT charge controller

In addition to controlling the level of charge or capacity of the batteries, the MPPT charge regulators regulate the voltage of the solar panels until they are modulated to the appropriate level for charging the batteries.

The MPPT load regulators or also called power maximizers have the particularity that they are used when it is necessary to amplify the output voltage of the photovoltaic field to obtain the appropriate power levels for the good operation of the battery and of the photovoltaic installation in general .

The MPPT load regulators allow to modulate the power adapting to the necessary one according to the type and model of charge regulator and batteries.

The MPPT controller has a higher voltage input than the PWM load controllers, so that several groups of solar panels can be connected in series.

In short, we can find the types of charge regulators, PWM charge regulators and MPPT charge regulators, PWM regulators are the ones that make solar panels work at the same power as batteries, are less expensive and can support more power in Wts that MPPT charge controllers.

The MPP are also called maximized load, the voltage to match the voltage of the solar panels to that of the batteries, as well as optimizing the charges and discharges of the batteries as well as their useful life. Also MPPT load regulators support more voltage than PWM regulators, therefore in medium and large self-consumption installations as well as MPT.

For more information and to ask for advice on what type of charge regulator you need for your solar installation, pump for well and cistern or purifier for swimming pools as well as solar inverters, structures for solar panels do not hesitate to contact us, we will help you without obligation.