![]() MPPT controllers can convert this excess voltage into more amperage for the batteries. Solar panels usually provide an excess voltage to the battery bank. ![]() Many estimates have determined that using an MPPT charge controller can increase system efficiency by up to 30%. MPPT technology has existed for a few decades but has only recently evolved to become affordable for the average homeowner. They utilise a variety of features that make them a better choice over PWM controllers in most applications. MPPT (Maximum Power Point Tracking) controllers are a newer, more advanced technology. When it comes to efficiency, operating temperature, and cost, MPPT and PWM solar charge controllers differ widely. Which Is Better: MPPT or PWM Solar Charge Controllers? A solar charge controller acts as a valve, creating a one-way path for current to travel. Without a charge controller, power has the potential to run from the battery back to the panels. Block Reverse CurrentsĮlectrical current should only run in one direction in a solar setup: from the solar panels to the battery. Once the battery is above the “dead” threshold again, the charge controller will reconnect it and allow it to provide power again. When the battery reaches a set voltage indicating that you’ve depleted its charge, the charge controller will disconnect the battery and prevent further use. Solar charge controllers feature a low-voltage disconnect feature. Low Voltage DisconnectsĪttempting to draw power from a dead battery can cause irreversible damage. Overload protection prevents this danger from happening-instead of a battery malfunctioning, a fuse or breaker absorbs the excess power. A battery can catch fire or otherwise malfunction when large power spikes occur. ![]() Solar panels produce more power than a battery bank can handle. Overload or overcurrent protection is an essential function provided by solar charge controllers. They also contain safety features that prevent failures or fires in your battery bank, wiring, and other components. Without one, you could risk a surge that fries the system. First and foremost, solar charge controllers regulate energy flow from a solar array into the batteries. There are a variety of reasons that you need a charge controller for your solar system. Why Do You Need a Solar Charge Controller? The best solar charge controller for your system will depend on whether you want to prioritise advanced technology and higher efficiency or a budget-friendly option. The two types of controllers perform similar functions, but they also exhibit some striking differences. There are two main types of controllers for residential applications: MPPT and PWM. Not all solar charge controllers have the same mechanisms for monitoring this flow. These devices monitor and adjust the flow of energy that travels from a solar array into a battery bank. Solar charge controllers are essential components in both residential and commercial solar systems.
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