Quick Answer
Yes, you can use an MPPT controller in series with another type, such as a PWM controller, but it's crucial to match the voltage and current ratings of both controllers. The MPPT controller should be set to handle the maximum voltage and current of the system. This configuration is commonly used in battery banks with multiple strings or for applications requiring a specific voltage.
Compatibility and Configuration
When using an MPPT controller in series with another type, ensure both controllers are compatible and follow the manufacturer’s guidelines. Typically, the MPPT controller should be set to handle the maximum voltage and current of the system. For example, if you’re using a 48V system with a 20A PWM controller in series with a 60V MPPT controller, the MPPT controller should be set to 60V and 20A.
System Design Considerations
When designing a system with an MPPT controller in series with another type, consider the system’s overall voltage and current requirements. The MPPT controller should be able to handle the maximum voltage and current of the system, and the PWM controller should be able to handle the minimum voltage and current requirements. For instance, if you’re using a 12V battery bank with a 10A MPPT controller in series with a 15V PWM controller, the PWM controller should be set to 15V and 10A.
Practical Applications
In practice, using an MPPT controller in series with another type is often used in off-grid systems, such as in remote homes or cabins. This configuration allows for the use of multiple charging sources, such as solar and generators, and can provide a backup power source during grid outages. For example, a 48V system with a 20A MPPT solar controller in series with a 20A PWM generator controller can provide a reliable power source for critical loads.
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