Quick Answer
To fuel automatic generators in solar use, it's essential to maintain a sufficient battery bank to cover peak demand periods, ensure the generator is sized correctly for the system, and implement a suitable automatic transfer switch (ATS) to seamlessly transition between solar and generator power.
Setting Up the Generator and ATS
When configuring automatic generators for solar use, it’s crucial to select an ATS that can handle the generator’s starting current, typically around 3-5 times the generator’s rated capacity. For example, a 5 kW generator might require an ATS with a 15-25 A starting current rating. Additionally, the ATS should have a reliable control module that can accurately sense the solar array’s output and the battery bank’s state of charge.
Battery Bank Sizing and Charging
Adequate battery bank sizing is critical for automatic generators to perform optimally. As a general rule, a 24-hour battery bank should be sized to provide 2-4 kWh of storage capacity for every 1 kW of generator capacity. This ensures the battery bank can absorb the generator’s energy during peak demand periods and provide a stable power source when the solar array is not generating enough power. It’s also essential to ensure the generator and ATS are configured to charge the battery bank correctly, either through a separate charge controller or a multi-function ATS.
Generator Sizing and Placement
Proper generator sizing is essential to avoid overloading the system and ensuring safe operation. A good rule of thumb is to size the generator to cover 20-50% of the peak load, depending on the system’s specific requirements. Additionally, generators should be placed in a well-ventilated area, at least 10 feet away from any building or combustible materials, and should be installed on a level surface to prevent oil leaks and ensure proper operation.
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