Everything You Need To Know Before Buying Solar Charge Controller

Are you still looking for the best solar charge controller for your solar plant?

Or are you not sure about getting a solar charge controller fixed with your solar panel?

Or you simply do not have enough idea about choosing the solar charge controller that suits your needs?

Well, if the answer is yes, you are at the perfect spot. The post here gives all the information about the solar charge controller including its functionality, types and useability. The post also shed light on factors that are to be considered before buying a solar charge controller that is right for your solar panel and your energy needs.

Without ado, let’ go.

What Is a Solar Charge Controller? What Does It Do? Why Do You Need It? 

As the name suggests, a solar charge controller controls the charge coming from the solar panels. It primarily supervises the charging and discharging of the battery connected with the solar panel so that the solar energy is thoroughly utilised.

These are of the size of a small box and are positioned between the solar panels and the battery banks. These are used in the battery-based or off-grid solar energy systems only and not used in the straight grid-tied system as they do not have a battery to charge.

  • Saving the Battery

If a solar charge controller is not installed, the possibility of your battery getting overcharged becomes high due to uncontrolled high voltage from the solar panel. Constant overcharging of the battery raises the internal temperature of the battery, This increase in the temperature turn dries up the water inside the battery and eventually, the battery gets damaged and becomes dysfunctional. 

  • Ensuring  24×7 Operation

Solar charge controller ensures seamless functioning of the solar panel array 24 hours.

During the day, when the sun is out and when solar PV is charged, it stabilises the voltage throughout the grid system and charges the battery. And during the night when the sun goes down and when solar panels have a lower voltage than the battery, it makes sure that the current doesn’t flow in the reverse direction i.e from the battery to solar panel.

Thus, for optimising the potential of your solar power system and keeping your battery healthy for an uninterrupted power supply, solar charge controllers are essentially required.

What Are The Types Of Solar Charge Controllers?

While solar charger controllers come with different power ratings like 60, 80 and 90 amperes, these are broadly classified into two types:

PWM: Pulse Width Modulation 

These are relatively simpler controllers with a toggle that rapidly switches on and off to pulse the current from the solar panel to the battery. The voltage of the solar panel and battery remains the same when a PWM controller is used (If the solar panel is rated at 12V, the battery will have the same voltage). 

PWM is an older and inexpensive technology.

MPPT: Maximum Power Point Tracking 

These are more advanced and complex controllers which adjust the voltage at the optimum range and generate most current (If the solar panel is 12V, it can create a potential up to 18V). These can be used with multiple solar panels where

MPPT is a newer and expensive technology.

What Are the Factors To Consider Before Picking The Solar Charge Controller?

As the charge controller in the grid has to go through all the energy and voltage fluctuations, it is important that a reliable controller is used to get the maximum output. Here all the factors that need to be looked upon before buying a solar charge controller:

  • Battery Size
  • Price
  • Grid System Size
  • Solar Panel Voltage
  • Weather Condition
  • Required Output

Keynote: MPPT is a newer technology does not necessarily mean that it works better than of PWM. Both the two controllers work well. While PWM suitable for places which receive constant sunshine, MPPT is desirable in places which get variable sunshine.

Do give our blog a read for all your solar-related questions. You can also check out other interesting updates on solar on our Facebook page (facebook.com/zunroof)

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