Sarasota Generator Maintenance Checklist Before Summer Storms Arrive | CoHarbor Electric

Had a homeowner near Casey Key call us in a bit of a panic a couple Junes back. Storm was building in the Gulf, nothing confirmed yet, but she wanted to test her generator just to be safe. Good instinct. Except it hadn’t run since the previous November, and when she flipped it on, nothing. Dead battery, some corrosion on a connection nobody had looked at in months. We got her sorted before the storm actually hit, but it was closer than it needed to be. That’s the whole reason this checklist exists — do this work in May, not the week something’s already spinning up out there.

Summer storm season doesn’t wait for anyone to be ready. So here’s what we’d actually walk through on a generator before the season gets going, not after.

Start With the Battery

This is where most failures actually happen, more than any other component. Generator batteries sit in a hot environment and get asked to crank an engine on a schedule, and they wear out faster than people expect. A battery can hold enough charge to pass a quick self-test and still fail under the real, sustained load of an actual outage.

Checklist item: Have the battery load-tested, not just visually checked. If it’s more than two or three years old, ask directly whether it’s due for replacement rather than waiting for it to fail on its own timeline.

Confirm the Self-Test Cycle Is Actually Running

Most whole-home standby units run a brief automatic self-test every week or two, even with no outage happening. It exercises the engine, keeps the battery cycling, and — this is the important part — surfaces a problem while you’re not depending on the unit for anything real.

Checklist item: Watch one self-test cycle start to finish. Confirm it actually cranks and runs, not just attempts to. If the self-test feature has ever been disabled or you’re not sure it’s on, get that confirmed before storm season, not during it.

Check Oil, Filters, and Coolant

Standby generators run on internal combustion engines, same as a car, and they need the same basic upkeep — oil changes, filter checks, coolant levels for liquid-cooled units. Skipping this is exactly how a unit that starts fine on a two-minute test ends up failing on day three of a real extended outage, once it’s actually been running continuously instead of just cycling briefly.

Checklist item: Confirm oil and filter service is current per the manufacturer’s schedule, and check coolant level if the unit is liquid-cooled.

Look at the Fuel System

For natural gas and propane units, that means checking line connections and pressure regulation for any signs of wear. If there’s a portable gasoline unit in the garage as backup, fuel stabilization is its own concern in Sarasota’s humidity — gasoline sitting in a tank for months degrades faster than most people assume, and that’s a classic no-start cause that has nothing to do with the battery at all.

Checklist item: Inspect gas or propane line connections for leaks or degradation. If running a portable as backup, use fresh, properly stabilized fuel rather than whatever’s been sitting in the can since last year.

Test the Transfer Switch, Not Just the Generator

The transfer switch is what isolates your home’s electrical system from the grid and automatically switches over when power drops. It doesn’t get exercised nearly as often as the generator’s engine, and a transfer switch with a developing fault can mean the generator runs perfectly fine and simply never picks up your home’s load when it actually matters.

Checklist item: Have the transfer switch’s function verified as part of the pre-season visit, not just assumed to be fine because the engine starts.

Check for Corrosion, Especially This Close to the Coast

Given how much of Sarasota deals with coastal exposure, salt air accelerates corrosion at electrical connections faster than inland properties see. Caught early, it’s a quick cleaning and inspection. Left alone for a year or two, it becomes a connection that fails exactly when the generator’s asked to do real work.

Checklist item: Inspect connection points for early corrosion, particularly on units near Longboat Key, Siesta Key, or other waterfront areas.

Clear the Area Around the Unit

Simple, but easy to overlook. Standby generators need airflow and clearance to run safely, and Florida vegetation does not stay put — it grows fast, especially heading into the wetter months.

Checklist item: Clear vegetation, debris, and check for standing water risk around the generator pad before the rainy season really kicks in.

What Homeowners Can Reasonably Check Themselves

You don’t need to be an electrician to stay on top of a few basics between professional visits:

• Confirm the self-test cycle is actually running on schedule
• Listen for the cranking sound and make sure the unit fully starts, not just attempts to
• Check the control panel for error codes or warning lights
• Keep the area around the unit clear
• Track the date of the last professional service so it doesn’t quietly slip past a year unnoticed

Why Doing This in May Beats Doing It in August

We get it — nobody wants to spend money on generator service when nothing’s wrong. But the entire value of a standby generator is that it works the one time you actually need it, and that’s not something you want to discover has failed three days into a named storm’s aftermath, once technicians across the whole region are backed up with emergency calls. Getting service scheduled before the season gets busy means better availability, calmer timing, and no guessing.

Get Your Sarasota Generator Checked Before the Season Gets Going

If your standby generator hasn’t been professionally serviced in the last year, or you’re honestly not sure when it last was, Coharbor Electric is a licensed and insured electrical contractor serving Sarasota homeowners from Casey Key and Whitfield Estates to Bee Ridge and beyond. We’ll check the battery, transfer switch, fuel system, and connection points, and confirm the whole system actually does what it’s supposed to when it matters — not just when it’s humming along on a calm afternoon test. Reach out and get it scheduled before the next storm makes the decision for you.