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Solar Charge Controller [Complete Guide]

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Solar systems require a solar charge controller to keep maintain power. You want solar energy for the whole day and night then you will use a battery to keep store the power.  And for this, it is necessary to keep your battery in good working position. To keep it maintains you need a solar charge controller.

Solar charge controller

The solar charge controller is the device that actually controls the voltage and current flow. It controls the charge from panels to battery. It protects the battery from overflow and damage from voltage variation. When your battery is directly connected with panels than there are more chances your battery will damage with overflow. Mostly 12-volt solar panels provide energy of 16 to 20 volts and deep charge battery requires 14 to 15 volts to full charge.

Why a solar charge controller is necessary always?

It is not necessary to use a solar charge controller if you are using a low watt solar system. Your solar panels are throwing output of 1 to 5 watt than you don’t have the need to connect it with a charge controller.  You can simply use an AGM battery for storage.

When using a high voltage panel

You are using high voltage panels then you have to connect your batteries with a solar charge controller. Upcoming PV panels are up to 140 watts so they cannot be used with a standard charge controller that is designed for standard 12 watt solar.

Types of solar charge Controller

Solar charge controllers come into two different types; one is PMV and second is MPPT. Both are different in their work scenario and their prices are also different. MPPT is expensive as compared to PWM.

PWM Solar Charge Controller:

PWM solar charge is known as “Pulse with modulation”. This type of charge controller makes a direct connection with the battery to get maximum output. These charge controllers are used to connect with a battery that is designed for a 12-volt solar panel. If you are using a high voltage solar panel with a low voltage battery than it means your extra solar power is wasting. As an example, if you are using a 24-volt solar panel with a standard battery of 12 volts. It means you are losing up to 60% extra charge. And if you are trying to charge a 12-volt battery with a high voltage solar panel like 24 volts, then you are losing 100% power.

You should connect a 12-volt battery with 12-volt solar panel, 24-volt battery to 24-volt solar panels same goes up and up. So choose a battery that is designed for a specific type of solar panels. This process will make your solar system last longer and more reliable.

MPPT solar charge controller:

Maximum Power Point Tracking (MPPT) solar charge controller is a device that controls the incoming and outgoing voltage on the basic term that incoming voltages are equal to the output voltage. When it feels the drop in the voltage it tries to make them equal to the battery voltage by increasing the current amount. By this controller, you can charge 12v, 48v or any other battery by just adjusting solar panels in series.

Features of a Charge controller:

These are the basic key features of a charge controller that makes them more reliable and trustworthy devices.

Stops reverse current:

These charge controllers are designed to control the reverse control flow. In the night, when there is no sunlight, solar panels can be the cause of draining batteries power. These charge controllers can prevent this type of power to lose.

Battery saver mode:

These charge controllers have the ability to indicate a low level of the battery. They disconnect the extra load when the battery power is at a low level.

Date Display:

These solar charge controllers have a display screen that shows the battery power level, input, and output current etc. You can check your solar system current status from the data display screen.

Light indicators:

These solar controllers have light indicators that you can configure for yourself, or according to your requirement.

Reasonable price:

Main and last feature is that the solar charge controller price is very affordable in Pakistan. so many controllers are available in the local and online market. Choose according to our requirements.

Last Advice:

Choose a solar charge controller that is feasible for your solar system. First, analyze your requirements and then check its features.  

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