If your business has a standby generator, June 1st — the official start of Atlantic hurricane season — is not the time to find out it doesn’t work. A generator that hasn’t been professionally tested and serviced before storm season is a liability, not a backup plan. Here’s the complete pre-season checklist every South Florida business owner should run through before the end of May.
The Stakes for Commercial Properties
For residential homeowners, a generator failure during a hurricane means discomfort and inconvenience. For a business, the stakes are considerably higher. Depending on your industry, an extended power outage can mean:
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Spoiled inventory (restaurants, food service, medical offices)
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Inaccessible data or downed servers (professional services, financial firms)
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Inability to serve customers or meet contractual obligations
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Security system failures (retail, warehousing, property management)
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Regulatory compliance issues (healthcare facilities, pharmacies)
In Palm Beach, Martin, Broward, and Miami-Dade counties, hurricane-related power outages can last days to weeks. A properly maintained, tested standby generator is the difference between staying operational and shutting down. Kasper Electric provides dedicated generator services for commercial properties throughout South Florida.
The Pre-Season Generator Checklist
1. Schedule a Professional Load Test
A load test runs your generator at or near its full rated capacity to confirm it can actually sustain the electrical demand of your facility. Monthly self-tests only verify that the engine starts — they don’t confirm the generator can carry a full load. A professional load test should be performed at least annually, and before hurricane season is the ideal time.
2. Inspect and Replace the Oil and Filters
Check the engine oil level and condition. If the oil is dark, gritty, or hasn’t been changed within the manufacturer’s recommended interval, change it before season. Replace the oil filter, fuel filter, and air filter at the same time. Running a generator under heavy storm load with degraded fluids is one of the most common causes of mid-outage failure.
3. Check the Battery and Starter System
Generator startup failures are most often caused by a weak or dead battery. Have your generator’s starting battery load-tested by a professional. If it’s more than 2–3 years old, replacement is often worth the cost for peace of mind.
4. Test the Automatic Transfer Switch (ATS)
The automatic transfer switch detects a utility power failure and switches your facility to generator power — usually within 10–30 seconds. If the ATS fails, your generator can be in perfect working condition and still leave your building dark. Have a licensed electrician inspect and test the ATS as part of your pre-season service, including manual override capability.
5. Inspect Fuel Supply and Fuel System
Confirm that your fuel supply is adequate for extended operation. For diesel generators, check that fuel hasn’t degraded — diesel stored for more than 12 months without a stabilizer additive can cause clogged filters and engine problems. For natural gas generators, verify that the gas supply line and regulator are in good condition.
6. Inspect Exhaust System and Cooling
Check that the exhaust system is clear of obstructions and directing exhaust safely away from building air intakes. Verify coolant levels and inspect the cooling system for leaks or worn hoses. Generators run hot under extended load, and a cooling failure is a fast path to engine damage.
7. Review Your Transfer Switch Load Schedule
Work with a licensed electrician to review which circuits are connected to your transfer switch. As your business grows, your original load schedule may be outdated. Confirm that critical systems — servers, refrigeration, lighting, security — are prioritized.
8. Confirm Permit and Compliance Status
In Palm Beach and Martin Counties, commercial generators require permits. If your generator has been relocated, modified, or your permit status is uncertain, a licensed electrical contractor can help you verify compliance before an inspector shows up after a storm.
When to Schedule Service
Late April through the end of May is the ideal window for commercial generator service in South Florida. Once hurricane season begins — and especially once a named storm is in the forecast — licensed electricians and generator service companies become fully booked.
For more on how to prepare your property’s electrical system overall, see our resource on essential electrical maintenance for hurricane preparation.
