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What Happens If Your Solar Charge Controller Is Too Big?


Everyone knows that overcharging can be a big problem when charging device batteries. After all, it causes damage to your devices, reducing their lifespan.

When using solar panels to charge, you can’t control the electrical charges that come in. In that case, the solar charge controller is a necessary regulator.

The charge controller regulates the voltage in your devices and prevents the battery from overcharging. So, we can confirm that solar charge controllers are necessary.

But what about the solar charge control sizing? We focus on what happens if your solar charger controller is too big and other related issues.

So, ensure you check it out as we answer this crucial question regarding solar panel use in charging.

What Occurs When the Solar Charge Controller Is Too Big?

Solar charge controllers limit the electric power output, ensuring you don’t pass too much voltage to your devices’ batteries. It ensures that your devices only have access to the maximum power allowable.

So, what happens when the controller is too big? If the solar charger controller is too big, there is a waste of power.

The charge controllers work on limiting the amount of power that passes through to the devices. Thus, a big one leads to a waste of power.

In that case, ensuring that your solar charge controller size is correct would be best. Having it too big would mean you can use every bit of energy produced but at a cost.

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Also, there are unintended consequences that you must learn to deal with, including:


Having a solar charge controller larger than your system means you are at risk of overcharging. It is what the controller works on preventing, but it easily occurs with a too big solar charger controller.

Overcharging occurs when your battery is charged beyond the set voltage limit. It leads to overheating of the battery leading to damages hence reducing its lifespan.

Studies show that why many batteries have issues because of overcharging.

Other than overheating the battery, it can lead the battery to emit toxic fumes, which are dangerous for your devices and your health.

Reduce The Battery Efficiency

A too big solar charge controller can reduce your battery’s efficiency. When a battery is continuously overcharged, its performance will suffer since it reduces capacity and can barely hold the charge.

With all these issues, the battery life is reduced, and the devices’ owners must frequently replace them.

Overheads Become Larger

Going for a too big solar charge controller means catering to unnecessary expenses. The sizeable solar charge controller is usually costlier compared to the smaller ones.

After all, you have a large controller with many unnecessary features. It means you are investing in things you don’t need.

Such a move will lead to a waste of money and resources.

How Do You Achieve the Best Solar Charge Controller Size?

There are many solar charge controller sizes available depending on the manufacturer. And, of course, it would be weird to choose randomly since a too small or big controller won’t do the job well.

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In that case, determining the best solar charge controller size is vital. There are simple steps to follow to define the correct size.

The first step would be to size the solar panel array and the battery bank. Later, you can determine which solar charge controller to use.

Find the total power through the controller= voltage multiplied by current. Use the power from the solar panels and divide the results with the battery’s voltage.

Introduce a safety factor by multiplying the results by 1.25 so that you can define the variable power outputs, for example, for 41.67 multiplied by 1.25 to get 52.09 amps.

In that case, you will need a 52-amp solar charge controller. So, when searching for the best solar charge controller, stick to your specifications.

Would You Rather Have the Solar Charge Controller Too Big Or Too Small?

Solar charge controllers control the amount of electric power that gets to your devices while powering them. Thus, it has specific information on how much power amperage it can hold.

Some of them have too big amperage while others have too small amperage. So, what choice would you rather have?

If the charge controller is too small, you are limited to the controller power in charging batteries. As for big controllers, you can pass as much power as possible, but it would still waste capacity.

In that case, it would be best to define the right controller size per your devices and stick to it. After all, having it too big or small has many drawbacks that will deliver many disadvantages to your devices.

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Is The Right Solar Charge Controller Important When Setting Up Your Solar Power System?

A solar power system is the future of the energy industry. After it, the globe is quickly focusing on delivering clean energy, including solar energy.

Using solar is effective and convenient since it holds adequate power to support your devices. So, there isn’t much to worry about for people going solar.

Plus, the government is keen on supporting solar power systems.

When setting up your system, there are many things you need to keep in mind. With that, you can have an efficient experience.

For this case, we focus on solar charge controllers. Many sizes are available; they can be too big or small.

The choice would depend on the manufacturer. But from the information above, you can tell there is a convenient way to choose the right solar charge controller.

You must calculate the right power for your solar system and define the best solar charge controller. Why?

Because it is the most convenient way to ensure you utilize all the available solar resources. It ensures you don’t go for a too big controller that wastes your time and money.

Also, you can avoid a small solar charge controller for the inability.

A solar power system is the first step to going solar, and of course, it is a great move for cleaner energy. However, there are many important things to consider, especially the solar controller’s size.

It would be helpful if you went for the right size in the solar charge controller.

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