Quick Answer
For off-grid solar use, some of the best automatic generator brands include Cummins, Kohler, and Generac, known for their reliable and efficient transfer switches and automatic start capabilities.
Choosing the Right Generator for Off-Grid Solar
When selecting an automatic generator for off-grid solar use, it’s essential to consider the system’s voltage and frequency requirements. Generators like Cummins Onan or Kohler’s RV Series can provide a stable 120/240-volt output with a frequency of 60 Hz. These generators often come with built-in automatic transfer switches (ATS) that can switch between grid power and generator power seamlessly.
Understanding Automatic Transfer Switches (ATS)
ATS systems are a critical component of off-grid solar systems, ensuring a smooth transition between grid power and generator power. A good ATS should be able to detect a grid power outage within 10-15 milliseconds and switch to generator power. This quick response time is crucial to prevent data loss and equipment damage. Brands like Generac’s Guardian Series offer advanced ATS systems with features like automatic shutdown, remote monitoring, and customizable settings.
System Design Considerations
When designing an off-grid solar system with an automatic generator, it’s essential to consider the generator’s capacity and runtime. A good rule of thumb is to size the generator to provide 100% of the system’s load for at least 8 hours during periods of low sunlight. This ensures that the system can meet the load requirements even on cloudy days or during extended grid outages. System designers should also consider factors like fuel storage, ventilation, and maintenance access to ensure the generator runs efficiently and safely.
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