Service

Generator Refueling for Standby and Prime Power

A generator is only dependable when its tank is full of good fuel. We deliver diesel or gasoline to standby, prime and emergency units on a schedule or on request.

Three Kinds of Generators, Three Fuel Patterns

Standby generators sit idle most of the time and need fuel that stays usable for long stretches. Prime generators run as the main power source, often on remote sites, and burn fuel steadily. Emergency generators serve life-safety loads and are held to demanding readiness expectations.

Each pattern calls for a different delivery rhythm. A standby unit may need a periodic top-off and a quality check, while a prime unit may need fuel every few days.

Before choosing a delivery pattern, find out what the generator actually protects. A unit that backs up a small office carries different expectations than one that keeps refrigeration, pumps or communications running. Writing the critical loads down shows how much fuel an outage of a given length would really need.

Give us a named contact who can authorize a fill, an after-hours phone number, and gate or key instructions for the generator pad. Delivering to an unattended pad is far smoother when the access details are already on file.

What We Deliver

Delivery goes to whatever the generator is built to use.

Fill ports and tank types vary. Some generators have a built-in base tank, others draw from a separate tank through a supply line, and some have a smaller day tank topped up from a larger one. Tell us which you have, and where the fill connection and any overfill alarm sit, so the operator knows what to expect.

Planning for Run Time

Good refueling starts with arithmetic: usable fuel divided by consumption at the load you expect. The manufacturer's data sheet lists fuel use at several load levels, and that figure is the one to plan around. Our walkthrough, how to plan generator fuel and estimate run time, shows the method step by step.

We use that same logic to propose a refill point. A tank should be topped up well before it reaches the level your outage plan treats as the minimum.

A full tank is not the same as full usable capacity. The fuel pickup sits above the bottom of the tank, and a reserve is wise. Ask the generator contractor how much of the tank counts as usable, and plan around that number.

Keeping Stored Fuel Fresh

Diesel in a tank that sits for a long time can pick up water, sludge and microbial growth. Condensation and oxidation are the usual causes. Regular fuel testing and, where needed, filtration are part of responsible readiness, and a fuel supplier can arrange or recommend them.

Before a forecast storm or planned outage, a pre-event fill is often the best use of a delivery. Request one early, because demand tends to spike when everyone calls at once.

After an outage ends, check the level and arrange a refill promptly, because the next one will not wait for a convenient date.

Rules That Apply to Your Tank

Larger fuel tanks at a facility can trigger federal spill planning rules based on total aboveground oil storage. If your site has a big generator tank in addition to other fuel storage, review aboveground fuel storage tank rules and confirm requirements with your environmental or safety contact.

Local fire code and your generator's manufacturer also have a say on tank placement and overfill protection. We follow your site's procedures when we deliver.

Keep delivery records with your generator logs, so the fuel history and the run history sit side by side when an inspector or technician asks.

If your site has several generators, list each one with its tank size, fuel type and fill location, so a single visit can cover all of them without confusion.

Questions

Common Questions

How often should a standby generator be refueled?

It depends on tank size, how often the unit runs, and the quality of the stored fuel. A monthly look at tank level and a plan for a top-off before any forecast event are sensible starting points.

Can you deliver before a storm?

You can request a pre-event fill. Timing is not guaranteed during widespread events, so booking ahead is wise.

Do you fuel units at hospitals, data rooms or other critical sites?

Critical facilities usually have their own fueling procedures and access rules. Share them with us in advance and we will build the delivery around them.

What fuel does my generator use?

Check the nameplate and the owner's manual. Most larger standby and prime units run on diesel, and smaller portable units on gasoline.

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