Solar Charge Controller

Optimise your solar system efficiency with a solar charge controller.

Harness the full potential of your solar panels while ensuring your batteries stay healthy.

About Solar Charge Controllers

What Are Solar Charge Controllers?

Think of solar charge controllers as your solar system’s best friend – they help to manage and regulate the flow of electricity between your solar panels and batteries. 

Solar charge controllers are crucial for ensuring the longevity and reliability of your solar power system. They protect your batteries, maximise the use of solar energy, and help you get the most out of your investment in clean, renewable power!

How it Works?

How Do Solar Charge
Controllers Work?

A solar charge controller is like a superhero that ensures your solar panels work at their best, while keeping your batteries safe and happy. Here’s what it does: 

Prevent battery overcharging

Solar panels generate electricity when exposed to sunlight. As the batteries get charged, the voltage increases. 

A charge controller monitors the battery’s charge level, to prevent overcharging and ensure its safety.

Avoid deep discharge

Deep discharge happens when your battery is nearly empty, and it can be harmful to your battery’s health.

Here’s when the charge controller comes to the rescue, cutting off power when needed to keep your battery healthy!

Regulate charging voltage

As temperature shifts, the charging voltage does too, and these controllers make sure your batteries get just the right voltage to stay happy and charged.

Monitor usage

Many modern charge controllers come with user-friendly interfaces that allow you to monitor the performance of your solar system.  With a monitoring system, keep tabs on your system’s status, track the power you’re generating, see what you can sell back, and tweak things as needed. It’s like having your solar power at your fingertips!

Optimise efficiency

Solar charge controllers use a technology called Maximum Power Point Tracking (MPPT) or Pulse Width Modulation (PWM) to optimise energy conversion.

MPPT controllers are like the superheroes adjusting the voltage and current to make sure your solar panels are always rocking their peak performance.


Types of Solar Charge Controllers

Your choice between PWM and MPPT controllers depends on your solar power system, budget, and efficiency needs. In general, MPPT controllers are favoured for larger commercial solar systems, while PWM controllers are more suitable for smaller off-grid solar panel systems.

 Pulse Width Modulation (PWM) solar charge controllers

Consider PWM controllers as the reliable and budget-friendly player in the solar game. They work by rapidly switching the power from the solar panels on and off to control the battery’s charging. This maintains the battery at a constant voltage. As a result of its lower efficiency, they’re more suitable for off-grid solar systems.


Maximum Power Point Tracking (MPPT) solar charge controllers

 MPPT controllers are more advanced and efficient. They continually adjust the voltage and current to ensure that the solar panels operate at their maximum power point. Yes, they might be a bit pricier, but their increased energy production often means a speedier return on investment!


Cost of Solar Charge Controllers

Entry-level PWM charge controllers for small solar systems can start at around SGD $50 and go up to SGD $150 or more for higher-capacity models. 

If you’re eyeing the MPPT controllers –  known for their stellar efficiency and performance – expect to start at around SGD $150 for standard capacities. For top-of-the-line, advanced models, the price can climb up to SGD $500! 

Don’t forget, the cost may also be influenced by factors like the brand, the quality of the build, and the extent of warranty coverage!

You Should Know

Factors to Consider when Choosing a Solar Charge Controller

When buying a solar charge controller, it’s crucial to consider several important factors to ensure you choose the right one for your solar system. Here’s what you should keep in mind:

Solar system size and voltage

Determine the size and voltage your system operates at. Solar charge controllers come in a variety of sizes and voltage ratings, so it’s like finding the perfect puzzle piece – make sure the controller you choose is a snug fit for your system’s specifications. 



Your charge controller shouldn’t exceed the rated input current of your battery, and it should be able to handle the highest possible current from the solar array. For example, if your battery system has a maximum current of 30 amps, you should not use a 40-amp charge controller.


Type of
solar panels

Consider the type of solar panels you’re using, as this can affect your choice of charge controller. Some controllers are optimised for certain panel technologies or voltage ranges.



Different charge controllers are compatible with specific battery types (e.g., lead-acid, lithium-ion). Ensure the controller you select is suitable for your battery techno


Frequently asked questions

A solar charge controller is a device that regulates the flow of electricity from solar panels to batteries. It’s essential to prevent overcharging and deep discharging of batteries, ensuring they remain in good health and prolonging their lifespan.

Sizing up your solar charge controller is like getting the right gear for a superhero – it depends on the total wattage of your solar panels and the size of your battery. You want a controller that can handle the voltage and current output from your panels while serving up the right voltage and current input for your battery.

Contact our team of solar experts and we will assist you in your requirements.

Treat your charge controller right, and it might just be your solar sidekick for a good 10 – 15 years or even more! The lifespan can vary depending on factors like the quality of the controller, its usage, and the environmental conditions in which it operates.

MPPT charge controllers are recommended if you want maximum charging efficiency, and for larger off-grid installations with multiple panels.

PWM charge controllers are less efficient, but cost-effective for small portable solar systems!

Leave the hard work to our GetSolar experts, especially for larger or more complex systems. This ensures the system’s proper setup and adherence to safety guidelines.

Read our step-by-step guide on solar panel installations to learn more.

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