What you always wanted to know about solar kits

What you always wanted to know about solar kits

What are the most common questions when choosing a photovoltaic solar kit? In this article we address different questions so that your decision is clearer when betting on solar energy.

Should a 60-cell solar panel always have an MPPT charge controller?

Yes, an MPPT regulator is needed to be able to connect grid connection panels (between 200W and 270W) for 24V to 48V installations. The regulator allows us to connect the panels in series, thus increasing the panel voltage (result of the sum of the voltage of each panel) above the battery voltage and thus carrying out an adequate charge of the batteries associated with the photovoltaic system. The MPPT regulator modulates the voltage obtained for this purpose, in addition to improving the energy generation of the photovoltaic system without increasing the intensity (the intensity of a branch of panels in series is equal to the intensity of a single panel).

The more batteries, the better the installation will work for me?

No, the relationship between solar panels and batteries must be proportional, because if the capacity of the batteries is much higher than the combined power of the panels, the battery charge will take longer to complete and the battery will suffer, shortening its useful life. .

Does any charge controller work with solar batteries?

No, they are selected according to the type of battery and the loads that are going to be connected to the system. Regarding the type of battery, we must pay attention to the charge curve, if it performs equalization, programming of absorption voltages, etc. As for the connected loads, we must bear in mind that in installations where current peaks occur due to motor starting, MPPT regulators must be installed.

Do batteries have memory effect?

No, the batteries do not have a memory effect, but they do leak, losing capacity if they are not properly charged and equalized when required. This sulfation produces a reversible capacity loss with the appropriate charging media.

Can another battery bank be put in parallel to expand capacity?

No, the battery bank is the only part of a photovoltaic solar installation that cannot be expanded, if already used batteries are grouped with new ones, there may be an imbalance due to the different internal resistances. If you want to increase the energy autonomy of the home, it is recommended to change the entire bank for another that offers more voltage and check compatibility with the rest of the elements of the photovoltaic installation.

Can batteries be regenerated once their useful life is over?

Regeneration only recovers sulfation in batteries. If the battery is faulty because it has exhausted its life cycles, no regeneration process will return the active material to the grid. You can only recover batteries that have been stored for a long time, batteries that have been badly charged for a long time, and some other very particular cases.

12.16.2021

What you always wanted to know about solar kits

What you always wanted to know about solar kits

What are the most common questions when choosing a photovoltaic solar kit? In this article we address different questions so that your decision is clearer when betting on solar energy.

Should a 60-cell solar panel always have an MPPT charge controller?

Yes, an MPPT regulator is needed to be able to connect grid connection panels (between 200W and 270W) for 24V to 48V installations. The regulator allows us to connect the panels in series, thus increasing the panel voltage (result of the sum of the voltage of each panel) above the battery voltage and thus carrying out an adequate charge of the batteries associated with the photovoltaic system. The MPPT regulator modulates the voltage obtained for this purpose, in addition to improving the energy generation of the photovoltaic system without increasing the intensity (the intensity of a branch of panels in series is equal to the intensity of a single panel).

The more batteries, the better the installation will work for me?

No, the relationship between solar panels and batteries must be proportional, because if the capacity of the batteries is much higher than the combined power of the panels, the battery charge will take longer to complete and the battery will suffer, shortening its useful life. .

Does any charge controller work with solar batteries?

No, they are selected according to the type of battery and the loads that are going to be connected to the system. Regarding the type of battery, we must pay attention to the charge curve, if it performs equalization, programming of absorption voltages, etc. As for the connected loads, we must bear in mind that in installations where current peaks occur due to motor starting, MPPT regulators must be installed.

Do batteries have memory effect?

No, the batteries do not have a memory effect, but they do leak, losing capacity if they are not properly charged and equalized when required. This sulfation produces a reversible capacity loss with the appropriate charging media.

Can another battery bank be put in parallel to expand capacity?

No, the battery bank is the only part of a photovoltaic solar installation that cannot be expanded, if already used batteries are grouped with new ones, there may be an imbalance due to the different internal resistances. If you want to increase the energy autonomy of the home, it is recommended to change the entire bank for another that offers more voltage and check compatibility with the rest of the elements of the photovoltaic installation.

Can batteries be regenerated once their useful life is over?

Regeneration only recovers sulfation in batteries. If the battery is faulty because it has exhausted its life cycles, no regeneration process will return the active material to the grid. You can only recover batteries that have been stored for a long time, batteries that have been badly charged for a long time, and some other very particular cases.

 

 

Can I put several charge regulators with different plates on the same batteries?

It is not the most advisable, but several regulators can be installed in the same installation in order to be able to use panels with different powers and electrical characteristics (with which panels from previous installations can be reused). Care must be taken to configure the same load parameters in all the regulators and use the same length and section of wiring so that they read the same voltage.

Should I disconnect the batteries from the regulator in homes for seasonal use?

No, the regulator is used to maintain the batteries at floating voltage, even if we are not using the installation, if we disconnect the batteries from the system, it will self-discharge and surely when we return home the battery will be discharged or sulfated.

Does an installation with solar panels and batteries have to pay a toll to the state?

No, it is completely legal and no toll is paid in the case of isolated houses with batteries. As long as the electricity is not sold to any other home, we must only comply with the low voltage regulations in the installation and materials used to comply with the law.

Are there solar panels that produce energy at night?

No, although the plates can give us some voltage on full moon nights there will be no current intensity and therefore energy to be used.

Do solar panels produce power on cloudy days?

Yes, even if the day is cloudy or with diffuse radiation, the solar panel receives irradiation and even if it does not produce 100% of its power, we can have between 10 and 20% production compared to a sunny day.

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