What is a solar controller?
A solar controller (also known as a solar charge controller) is a device used to manage the electrical energy transmission between solar panels and batteries. Its main functions are to prevent the battery from overcharging or over-discharging, extend the battery life, and optimize the efficiency of the solar energy system.
What is the role of a solar controller?
• Charging management: Controls the charging process to prevent overcharging.
• Discharge protection: Prevents over-discharging to protect battery life.
• Load control: Manages power supply to connected devices.
• System monitoring: Displays data such as voltage, current, and capacity.
What is the difference between a PWM and an MPPT controller?
PWM controller: Directly reduces panel voltage to battery voltage; suitable for small-scale or budget systems.
MPPT controller: Dynamically adjusts operating points for maximum power; higher efficiency, ideal for high-power systems.
What types of batteries can be used?
Most controllers support lead-acid batteries (sealed, open), lithium batteries (LiFePO4, ternary lithium), and gel batteries. Always confirm compatibility before use.
Does a solar controller have overload protection?
Yes, most solar controllers feature overload protection. If the load current exceeds the rated value, the controller automatically cuts off the output to protect the system.
How does a solar controller work at night?
At night, the controller stops charging and manages the battery's discharge to the load based on your settings, preventing the battery from being over-discharged.
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