How do we maintain and test our HOA's emergency generator?

By OurHOA · General information · Revised September 29, 2026

How an HOA board keeps a common generator ready: monthly loaded test runs, fuel and tank rules, the 100-hour federal limit, a service contract and a sample calendar.

Part of the HOA board handbook: vendors, projects and upkeep.

The short answer

Run it every month under real load for at least 30 minutes, keep a written log, have a service company do the oil, filters, coolant and battery work on the manufacturer's schedule, test diesel fuel once a year, and check whether the tank or the engine needs a state registration or air permit. Then put the generator, the transfer switch and the tank in the reserve study as separate lines. That covers the generator behind a condo building's elevators and exit lights, and also the smaller units many HOAs have at a clubhouse, a gate or a sewer lift station. Rules vary by state, by city and by your governing documents, so treat this as education, not legal advice.

Find out who owns it and what code it falls under

Start with the declaration and the plat or condo map. A generator that serves the whole community is usually a common element. One that serves a single building in a multi-building condo may be a limited common element, and the declaration may charge its costs only to the owners in that building. Get that answered before the first repair bill arrives. Next, ask the fire marshal's office or the original electrical engineer whether the building code required the generator. A generator installed because code called for emergency lighting, fire pumps or elevator power in a tall building is a life-safety system, and the local fire code sets its testing. NFPA 110, the emergency power standard most fire codes adopt, then applies, and the fire marshal can ask for your test records. A generator the board added by choice, for a clubhouse or a gate, has no code-mandated test schedule, but the same routine keeps it working. Write the answer in the board's maintenance file along with the model, serial number, kW rating, fuel type and tank size.

The monthly test run

NFPA 110 section 8.4.2 calls for exercising a generator at least once a month for a minimum of 30 minutes. For a diesel set, the run has to carry at least 30 percent of the standby nameplate kW rating, or enough load to hold the exhaust temperature the manufacturer recommends. Many generators have a built-in exerciser that starts the engine weekly with no load. That run tells you the engine starts, and not much more. A diesel that idles unloaded month after month builds up unburned fuel and carbon in the exhaust, which NFPA calls wet stacking, and you can spot it by steady black smoke while it runs. The fix is to transfer the building's real load to the generator for the test, or to bring in a portable load bank if the building load is too small to reach 30 percent. For a natural gas or propane unit, the standard is whatever load is available. Log each run: date, hours on the meter, the load in kW or amps, oil pressure, coolant temperature, any alarms, and who did it. Federal rules require many emergency diesel engines to have a non-resettable hour meter for this reason.

Fuel, tanks and the permits that come with them

Diesel ages in the tank. Water condenses, microbes grow, and filters clog the first time the engine runs for a full day. Have the service company pull a fuel sample once a year and polish or replace fuel that fails. Agree with the vendor on a minimum fuel level that triggers a refill, and sign a fuel delivery agreement that names the association as a priority customer after a storm. Tank size brings its own rules. In Florida, the Department of Environmental Protection regulates aboveground tanks over 550 gallons and underground tanks over 110 gallons under Florida Administrative Code chapters 62-762 and 62-761. A new tank has to be registered, the county storage tank inspector gets 30 to 45 days' notice of the installation and a confirmation 48 to 72 hours before it, and the system needs secondary containment, spill and overfill protection, release detection and proof of financial responsibility. Nationally, a site whose aboveground oil storage adds up to more than 1,320 gallons, counting only containers of 55 gallons or more, and which could reasonably spill into a waterway, needs a Spill Prevention, Control, and Countermeasure plan under 40 CFR part 112. That total includes every drum and tank on the property, not just the generator.

Hour limits and air permits in TX, CO and FL

Federal engine rules put no cap on hours during a real outage. For maintenance checks and readiness testing, 40 CFR 60.4211(f) for diesel engines and 40 CFR 63.6640(f) allow 100 hours per calendar year, and any non-emergency use, capped at 50 hours, counts inside that 100. Some older engines at residential and commercial sites are exempt from the 63.6640 rule under 63.6585(f), but a monthly half-hour test uses only about 6 hours a year either way. The real risk is someone running the generator to power a party tent or to avoid a utility bill. Texas: TCEQ covers emergency and standby generator sets through the permit by rule in 30 TAC 106.511. It needs no registration or fee, but the rule caps annual run hours at 10 percent of the normal annual operating schedule of the primary equipment, and the association must keep records on site showing compliance over a rolling 12 months, with copies of sections 106.4 and 106.511. Colorado: Regulation 3 exempts emergency power generators that run no more than 250 hours a year from an air permit. An Air Pollutant Emission Notice can still be required, and CDPHE issues exemption letters if you want one on file. Florida's main issue is the tank rule above, so ask your installer whether the engine also needs a state air permit.

The service contract and the bid rules

A volunteer cannot change filters on a 150 kW diesel. Hire a generator service company, not a general electrician, and ask each bidder to price these items separately: scheduled service visits at the manufacturer's intervals, with oil, oil and fuel filters, air filter, coolant test, belts, hoses and battery load test; an annual fuel sample; a load bank test if your building load cannot reach 30 percent; transfer switch inspection; emergency response time around the clock; and the hourly rate for storm call-outs. Ask for proof of insurance and the technician's training on your brand. Watch the dollar triggers. Texas Property Code 209.0052(c) requires a property owners' association contracting for services that will cost more than $50,000 to solicit bids or proposals through a bid process the association sets up. In Florida, section 720.3055 requires competitive bids for an HOA contract that exceeds 10 percent of the total annual budget, including reserves, and section 718.3026 sets the condo trigger at 5 percent. A multi-year service contract can cross those lines even when one year's price does not. Sample motion: 'Move to approve the two-year generator service agreement with ABC Power for $X per year, covering two service visits, an annual load bank test and fuel sample, and four-hour emergency response, and to direct the secretary to keep the monthly test log with the association's records.'

A sample year

Weekly: a director or the building's handyman walks by the unit and checks the fuel gauge, the battery charger light, the control panel for alarms, and the ground for leaks. Monthly: a 30-minute loaded run, logged. Tell residents in advance, because a transfer to generator power can make lights blink and stop elevators for a few seconds. Sample notice: 'The building's emergency generator will be tested on the first Tuesday of each month between 10:00 and 10:30 a.m. Lights may flicker and the elevators may pause briefly while power transfers. No action is needed.' Twice a year, or at the manufacturer's interval: vendor service visit. Once a year: fuel sample, battery replacement if the vendor's test shows weakness, and a load bank run if needed. In Florida, schedule the annual visit for May, before hurricane season starts on June 1, and confirm the fuel delivery agreement at the same time. Every reserve study update: separate lines for the generator, the transfer switch and the tank, with remaining life figures from the service company, not from a guess.

Mistakes boards make

Trusting the weekly no-load exerciser as the test is the most common one. The engine starts, the log looks fine, and the first real outage finds a wet-stacked engine that cannot hold the elevators. The second is ignoring the batteries. Starting batteries age out quietly, and a dead battery defeats a well-fueled engine. Third, nobody tests the automatic transfer switch, so the generator runs but the building never switches over. Fourth, the board replaces or enlarges a fuel tank without the state registration or the county inspector's notice, and learns about it from an inspection. Fifth, the log lives in a technician's truck. Keep it with the association's records, where the next board and the fire marshal can find it. For the rest of the equipment calendar, see our guide on building an HOA preventive maintenance schedule. If your generator backs up a sewer lift station, our guide on how to replace an HOA sewer lift station pump covers the pumps it keeps running.

Sources

These guides are general education for HOA boards and residents, not legal, tax, or financial advice. Rules vary by state and by your community's governing documents - check with a professional for your situation.

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