MPPT Charge Controllers

Buy MPPT controllers at AutoSolar. They allow to obtain the maximum power of the solar panels making them always work at the point of maximum power. In this section you can find MPPT solar regulators for off-grid and grid-connected solar installations. They offer economic savings thanks to the MPPT system.


12V Charge Regulators

24V Charge Regulators

48V Charge Regulators


MPPT Charge Controllers

Information about MPPT charge controllers

An MPPT charge controller or MPPT solar regulators is an electrical adapter that generally works in the part of its curve where the charge is optimized, whatever the load connected to the generator. The MPPT controller within the range of charge regulators is the one that provides the greatest value to the installation, since the MPPT charge regulator is capable of measuring the temperature, irradiance and electrical resistance of the circuit in order to find the optimal point of load.

The MPPT charge regulator analyzes the maximum power point to register the maximum power based on the detection of increases and decreases in the voltage of the photovoltaic generator.

The MPPT controller is included as an integral part of the inverters for photovoltaic kits connected to the grid; While when it comes to an isolated solar kit or an isolated photovoltaic system it is not so common to incorporate an MPPT charge controller , the reason why an MPPT charge regulator is not usually included in an isolated kit is because it makes the regulator more expensive and if the installation or solar kit work well without the MPPT solar charge regulator, it is because the loads are adapted to each other, so the incorporation of an MPPT regulator does not provide any benefit .

In short, a 30a MPPT regulator , or any other amperage regulator, will be necessary when not working with photovoltaic modules and unadapted voltages .

The MPPT solar charge regulator is located between the output of the photovoltaic generator and the rest of the system that acts as a load.

The variety of cheap MPPT charge controller or MPPT regulator is wide and it is essential to know the needs of the electrical installation and technical characteristics to choose the MPPT solar regulator according to your needs. Among the most common MPPT solar regulators are: MPPT 30A solar regulator (solar regulator 30) or MPPT 30a regulator , Atersa charge regulator .

What characteristics do our MPPT present ?

– Very fast maximum power point tracking (MPPT) , especially in cloudy weather and when the light intensity changes continuously. Our MPPT controllers or MPPT solar regulators improve energy harvesting by up to 30% compared to PWM charge controllers, and up to 10% compared to slower MPPTs.

From this moment, the case of the terms solar controller MPPT , MPPT , MPPT charge controller , MPPT charge controller , MPPT controller , solar charge MPPT , MPPT charge controller and regulating solar MPPT refer to same terms.

– Advanced detection of the maximum power point , since there can be two or more maximum power points (MPPT) in the load voltage curve. Conventional MPPT solar regulators usually select a local MPPT , but this is not the optimal one. The maximization of energy collection occurs thanks to the internal algorithm that selects the optimal MPPT.

– Exceptional conversion efficiency of the MPPT charge regulator or charge controller , without fan the maximum efficiency is 98% and the full output current up to 40ºC (104ºF). The charging algorithm is flexible and the charging algorithm is fully programmable .

– The MPPT charge controller or MPPT charge controller has extensive electronic protection , overheating protection and power reduction in case of high temperature. In photovoltaic panels short circuit and reverse polarity protection, as well as reverse current protection of solar panels.

– The MPPT controller or MPPT solar charge regulator has an internal temperature sensor that compensates the absorption and float charge voltage according to temperature.

– The MPPT solar charge controller or MPPT solar regulator has the option of displaying data on the screen in real time on tablets, smartphones and other Apple and Android devices.

MPPT Charge Controllers are basically a type of high-performance solar charge controller , whose main characteristic is to obtain the maximum possible power at all levels of solar radiation. In addition, they are the only charge regulators that allow a grid-connected solar panel to work perfectly within an isolated installation.

MPPT charge regulators are the devices that, in an installation, direct and control the amount of energy that flows between the battery and the photovoltaic modules that make up the solar panel. While in PWM-type MPPT solar charge regulators or regulators, the modules work at the voltage that has been determined in the battery, in MPPT regulators or MPPT charge controllers(Maximum Power Point Tracking, hence its acronym) a DC-DC transformer is integrated (that is, it transforms high-voltage direct current to low-voltage direct current) and a maximum power point controller that can be reached by a battery, so that it works with the modules at the voltage that best suits each moment, without a fixed maximum. With this type of MPPT regulator , we have the advantage of ensuring maximum power extraction or, on the contrary, of limiting it in some battery charge and discharge phases.

This type of MPPT charge regulators, MPPT controllers or MPPT solar charge regulators are the most suitable and useful for high-power installations, since they ensure maximum performance. In addition, it is compatible with more panels than the PWM regulator, offering greater possibilities when using it; It is also possible to add panels in series with a total voltage higher than that of the battery bank. MPPT regulators or MPPT solar charge controllers conserve batteries better, something very important since a long-lasting battery is a treasure in a photovoltaic installation. The power of the MPPT regulator amounts to 80 A.

AutoSolar MPPT controller or MPPT solar charge regulator , offers the widest range of cheap MPPT regulators , for example: MPPT 30a solar regulator or 30 solar regulator , as well as Atersa charge regulator .

If you want MPPT solar regulators or MPPT solar charge controllers, contact us, as we offer cheap MPPT regulators , the cheapest MPPT controllers on the market. Getting a cheap charge regulator has never been so easy. Contact us and our technicians will advise you on the MPPT solar regulator or MPPT controller that best suits your needs according to your needs.

How should a solar panel be connected to an MPPT charge controller?

MPPT regulators, as their name suggests, make the panel work at its maximum power point. They separate the voltage in panels from the voltage in batteries and are significantly more expensive, but also more efficient, taking advantage of all the possible production. Because of this, the following conditions must be taken into account:

1- The voltage range specified by the manufacturer :

For battery systems , MPPT charge regulators usually have a maximum between 100 or 150V and up to 250V for the most modern regulators of this type. This gives us greater flexibility and will allow us to work at higher voltages, which is what will avoid some power loss. We should never exceed that voltage figure , taking into account that in very cold environmental conditions, the voltage delivered by a panel can rise significantly and the manufacturer of the regulator limits us with the open circuit voltage (Voc). This is the production figure of the panel that we must look at, which is higher than the voltage at maximum power (Vmp)

If we use solar panels like the ones in the previous example that we remember deliver 45.7 Voc, if we put 2 panels in series (91.4V) we are dangerously close to the limit of a regulator that can withstand 100V. In this case we recommend either using 60-cell panels that deliver a lower voltage (around 37 Voc) or a regulator that supports 150V.

Remember that the ideal is always to work at the highest possible voltage in the panels. That is why it is advisable to choose the plate distribution that allows us to have the highest voltage without endangering the MPPT regulator. As we have reiterated, a higher voltage will allow us a smaller wiring section and also fewer problems with the distance between the solar field and the regulator.

2- The maximum load current that the regulator supports :

It is the current that goes from the regulator to the battery , nothing to do with the one that goes from the panels to the regulator. In this case, if the MPPT can work with a 12, 24 or 48V battery, we must divide the total power in panels by the battery voltage to find out if the regulator can fall short.

For example with 3 panels of 325W we will have a total of 975W.

– If the installation works at 48V: 975W / 48V = 20.31A. In this case, with a regulator of 20A or more, we will have enough.

– If the installation works at 24V: 975W / 48V = 40.62A. We see that the load intensity doubles, so now we should use an MPPT of 40A or more.

– If the installation works at 12V: 975W / 12V = 81.25A. We double the load intensity and we see that we need an 80A regulator.

The conclusion at this point is that a system that works at a higher voltage will be much cheaper, since the regulator may have a lower current intensity and also, as we have mentioned, it will work more efficiently.

3- The series must have identical characteristics :

When we form several groups of panels connected in series-parallel pairs , it is imperative that all the panels are identical and that they carry the same number of units in each series. It must be remembered that in order to charge the batteries , we must arrive with a minimum voltage that is always higher than the maximum voltage that the battery will require for its full charge in any of its stages.

For example, with panels of 60 cells that deliver about 37Voc and a regulator whose limit is 150Voc, we can do the following:

2 solar panels – Distribution in a single series (Total Voc: 74) – Suitable for 12 and 24V battery.

3 solar panels – Distribution in a single series (Total Voc: 111) – Suitable for 12, 24 and 48V battery.

4 solar panels – Distribution in 2 series of 2 units (total Voc: 74) – For 12 and 24V battery.

5 solar panels – Distribution impossible.

6 solar panels – Distribution in 2 series of 3 units (total Voc: 111) – Suitable for 12, 24 and 48V.

7 solar panels – Distribution impossible.

8 solar panels – Distribution in 4 series of 2 units (total Voc: 74) – For 12 and 24V battery.

We can conclude that for a 150Voc regulator, we will make a series of 3 units at most and then as many parallel ones as the power of the MPPT regulator limits us.

In grid connection inverters, the MPPT that they integrate can accept voltage ranges from 150V to 800V depending on the model, so in this case we can make long series of more than 20 solar panels, nothing to do with battery regulators whose limit is usually 150V and up to 250V in the latest Victron models.

In short, with an MPPT regulator we will have more efficiency and more flexibility when connecting any type of solar panel to our installation . As a precaution , we must never exceed its voltage and respect the fairness of all the branches that we make in parallel. On the other hand, if we install more solar power than the MPPT regulator is capable of charging the batteries, it will limit its output, it will not break as it happens with PWM regulators . The drawback is that in times of abundant production, that extra installed power will be wasted.

We always recommend keeping in mind that an MPPT regulator can carry any type of panels, but they must be in sufficient number for a correct distribution and also depending on the voltage to which we go in batteries .

For any questions, call us and our technicians will be able to assist you to solve your needs.

MPPT Solar Controller Calculation

MPPT regulators can be used with all types of solar panels , although it must be borne in mind that these solar regulators were designed to be configured with 60-cell solar panels, since this type of panel works at different voltages compared to conventional panels. 12V and 24V.

A quick method to calculate the MPPT solar controller is to divide the power of the photovoltaic generator by the battery voltage .

Example : 1,320W of solar panels for a 24V battery: 1,320W / 24V = 55A; we can use a 50A MPPT solar regulator as these regulators do not burn out if the charging current is exceeded. This is because they themselves are responsible for modifying the working voltage of the solar panels to limit the charging current.

1,320W of solar panels for a 12V battery: 1320W / 12V = 110A; As we can see, these regulators with 12V batteries are not the best option, because the charging current that we have calculated is very high and the cost of this MPPT solar regulator would be high.

Important: Battery charging current is not the same as solar generator current . The generator current depends on the series-parallel configuration of the solar panels, while the load current is calculated as we have seen. The solar generator should never exceed the maximum allowable DC voltage at the input of the MPPT solar controller or it will burn out. Therefore, we must take into account the no-load voltage or open circuit Voc of the solar panels and how the temperature affects the output voltage of a solar panel to perform the calculation correctly.

Typical utilities of MPPT solar regulators

The most common uses of an MPPT controller are:

– In installations where the photovoltaic modules have 60 cells , since we are obliged to install an MPPT regulator to be able to reach 100% battery charge. This type of regulator must be installed in installations where the module is connected to the network and the battery bank is 12V .

– It is very useful in installations with high energy demand , since it is a maximizing regulator always working on its maximum power curve.

– It is widely installed in places where there is a great distance between the solar modules and the battery bank , making a series of plates to gain voltage and avoid voltage losses and reduce the cable section . The higher the voltage, the smaller the cable section and the less voltage losses.

– It is also common in installations with a reduced space available for solar panels , in this way we will make the most of the installed module, such as in installations for caravans and boats.


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