Solar Charge Regulators

Buy charge regulators at the best price in; Charge regulators of all types, both PWM and MPPT charge regulators . For voltages of 12 and 24 volts, it is necessary to have a charge regulator to control the charge and discharge of a battery or accumulator within a solar installation. Charge regulators are installed between the solar panels and the battery to control the state of charge of the battery .

It is very important to know how to choose the optimal solar charge regulator or solar panel regulators for the needs of your solar installation.


12V Charge Regulators

24V Charge Regulators

48V Charge Regulators


Charge Regulators

Which charge regulator is better to use?

Before starting, we will give a brief review of the 2 types of charge regulators or solar regulators : The PWM charge regulator , is the one that only acts as a cut-off of energy between the solar panels and the battery when it has a load complete. For this charge regulator to work correctly, the same voltage must be found in the solar panels and in the batteries, for example, if we have a 12V solar panel and a 12V battery. It will also work properly if we have 24V solar panels and a battery pack that works at 24V.

12V Panel + 12V Battery = PWM Charge Controller

24V Panel + 24V Battery = PWM Charge Controller

Panel 48V + Battery at 48V = PWM charge regulator (In this case we must check that the charge regulator works at 48V since not all charge regulators are capable of doing so)

On the other hand, we find MPPT charge regulators , this type of charge regulator or battery regulator that, in addition to cutting off the flow of current from the solar panels when the battery is fully charged, these types of charge regulators or Solar regulator are capable of adapting the output voltage of the solar panel to the voltage of the battery . Use this type of charge regulators or, what is the same, solar charge regulators , and it is very useful when we have a solar panel that is not battery voltage. Here are some examples of how a charge controller works:

Grid Connection Panel + 12V Battery = MPPT charge controller

24V Panel + 12V Battery = MPPT Controller

All MPPT charge controllers have 3 very important limitations to consider when choosing the charge controller needed to regulate the charge of the solar panel:

The first limitation that we find in MPPT charge regulators is the maximum power of the photovoltaic field , that is, each regulator will limit the amount of W that all the panels that we have in our system add up, for example, if we have 2 300W solar panels, we must bear in mind that we have a 600W photovoltaic field. MPPT charge regulators or battery regulators have W limitations in the photovoltaic field.

The second of the limitations of MPPT charge regulators or MPPT battery regulators is, as in all charge regulators or solar panel regulators, the input amps from the panels , we should never exceed the maximum amps of the charge regulator. To calculate the amps that come down from the solar panels we must add the amps of each of the panels and add them. In the event that we make series of solar panels of 2 or 3 solar panels, we must take into account that in the series voltage is added and not amps, so the downstream amperage of a group of 2 solar panels will be the same as it would be. a panel, but at twice the voltage.

The last limitation is the input voltage , normally, MPPT charge controllers or MPPT solar charge controllers have a higher input voltage than PWM charge controllers , so that it allows us to have several solar panels in series. For example, if a solar panel has a maximum current of 8A and 34V, when connected to another of the same type in series, the result of the union will be 8A and 72V. We should never exceed the voltage limit of the charge regulators if we do not want to have problems with its operation. Hence the importance of the solar panel regulator or solar regulator.

Charge regulators or solar charge regulators are one of the most important parts of our photovoltaic solar installation. The charge regulator or Solar Charge Regulator is located between the panels and the battery and is in charge of controlling the voltage and intensity with which the batteries are charged. The charge regulator or solar panel regulator thus becomes a key piece, since it is the one that will take care of the battery and, in this way, extend its useful life.

The charge regulator component or solar panel regulators also protect the batteries against overloading or against very deep discharges. Thanks to the charge regulator or solar regulator , the state of charge of the battery is controlled at all times and can generate alarms depending on the battery charge


The advanced technology of these charge regulators or battery regulators allow them to automatically adapt to the different conditions set by the battery, and also allows them to manually regulate different parameters.

In general, we find two types of solar charge regulators or solar regulator : PWM charge regulators and MPPT charge regulators .

These solar charge regulators or solar panel regulators differ in the voltage at which they make the photovoltaic modules work. PWM solar charge regulators are the simplest and make the modules work at the voltage of the battery. They are said to act as “switches” between solar panels and batteries.

The MPPT charge regulator or MPPT solar panel regulator have a maximum power follower and make the modules work at the voltage that best suits the battery, depending on the stage of charge it is in. The MPPT charge regulator is the one that manages to get the most out of the photovoltaic modules.

Charge regulators or solar charge regulators : These charge regulators are a type of charge controller or specific charge regulator for solar energy that is responsible for limiting the battery charge and discharge limits. When a battery is 100% charged, the solar charge controller cuts off electricity from the solar panel to the battery. When the consumption that we are having is greater than the charge in the battery, and it reaches the limit of its capacity, the solar charge regulator or solar panel regulator It intervenes to cut the consumption that we are making, preventing the complete discharge of the battery.

Charge regulators or charge regulators are composed of two inputs and one output for consumption, each solar charge regulator or solar panel regulator has an input for the positive and negative of panels, another for positive and negative of batteries and an output for direct consumption at 12V, without the need to use any current inverter that transforms the 220V energy, so that if we have a system all running at 12V we only need the solar panel, the battery, and the solar charge regulator , in addition to having a consumption 12V. Some charge regulators Like the Atersa, they have a small display where the percentage of battery charge and discharge can be shown, thus having greater control over it.

Cable sections for the charge regulator

It is very important to take into account the sections of the cables of the photovoltaic systems, since it is direct current at low voltages, it must be of a larger section than in alternating current installations installed in homes for regular consumption.

How to calculate the cable section required for photovoltaic systems with PWM charge regulator : When we have a PWM solar regulator, we install the same cable section between photovoltaic modules and regulator as between regulator and battery.

How to calculate the section of the necessary cables for photovoltaic systems with MPPT charge controller :When having an MPPT solar regulator we have to take into account that the operating voltage of the photovoltaic field is different from the voltage of the battery bank. As it is a higher operating voltage of the photovoltaic field, we obtain greater efficiency, since at all times we make the photovoltaic system operate at its maximum power point, this is one of the great advantages of the MPPT solar regulator model. By having higher voltages in the photovoltaic field, we can reduce the section of the photovoltaic wiring, with the wiring between the regulator and the batteries having a larger section, since the MPPT regulator will reduce the voltage of the solar field to the operating voltage of the battery bank.




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