Quick Answer
Mixing different inverter brands in your system is generally possible but requires careful consideration of compatibility and sizing to avoid potential issues.
Compatibility and Sizing Considerations
When mixing different inverter brands in your system, it’s essential to ensure that the inverters are compatible with each other. This includes matching the inverter technology, such as string or micro-inverters, and ensuring that they can be programmed to work together. For example, a system with a string inverter from one brand and a micro-inverter from another brand may require additional communication modules or gateways to facilitate communication between the inverters.
Inverter Sizing and Configuration
To ensure smooth operation, it’s crucial to size the inverters correctly and configure them to work together. A rule of thumb is to size the total inverter capacity to be between 10% to 20% larger than the total AC load of the system. This allows for some flexibility and ensures that the system can handle peak loads. Additionally, consider the configuration of the inverters, such as whether they will be connected in parallel or series. In a parallel configuration, each inverter should be sized to handle the same load, while in a series configuration, the total capacity should be calculated by multiplying the capacity of each inverter.
Communication and Monitoring
To facilitate communication and monitoring between different inverter brands, consider using a central monitoring system or a third-party communication module. This allows you to view the performance of each inverter, as well as the overall system, from a single interface. Some popular options for central monitoring systems include Solar-Log, Schneider Electric, and Fronius. When selecting a monitoring system, ensure that it is compatible with the inverter brands being used in the system to avoid any potential issues.
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