Fuel delivery at a remote solar site works best when it is run as a scheduled supply route, not as a favor from whichever truck is nearby. The plan rests on four items: estimated burn at each generator location, tank capacity at that location, the interval between deliveries, and a named person who owns the fuel log. Settle those before the first generator is set, and a missed delivery becomes a scheduling problem instead of a stopped crew.
Solar builds differ from most projects because the work spreads across a large block of land with many scattered loads. Under OSHA’s construction standard on flammable liquids, 29 CFR 1926.152, only approved containers and portable tanks may be used to store and handle flammable liquids, and the text sets quantity limits for storage in rooms and cabinets. The standard is written for liquids with a flashpoint at or below 199.4 °F. Whether it applies to the diesel on your site, and how, is a decision for your safety lead, since it depends on the fuel, the container and the jurisdiction.
Our guide to generator rental for solar farm construction and commissioning covers the power needs of each build phase. This article covers only the fuel side. The corridor case, where loads move along a line, is handled in the linear project fuel plan, while a block site is the opposite problem: loads stay put, but they sit far apart and far from pavement. Fuel use also continues while a finished site waits on the utility, as covered in the article on late interconnection delays on a solar project.
Estimating consumption across scattered loads
Start by listing generator locations, not individual generators. Each location gets a load estimate for the work it supports, such as a laydown yard office, a pile installation area, a trailer cluster or a crew commissioning an inverter pad. Fuel burn depends on load and hours, so the generator fuel consumption chart gives a starting point for each unit size at partial load. Treat the result as a planning estimate and check it against log readings once the unit is running.
Billing for Stag units runs by single, double or triple shift, and the shift pattern also drives running hours. A location on one shift needs less fuel than the same unit on three. Write the shift assumption next to each estimate, so the delivery schedule changes when the shift pattern does.
Tank size against delivery frequency
Tank capacity and delivery frequency trade against each other. A larger tank lets deliveries come less often, but it raises the quantity stored on site and brings the storage question back to your safety lead. A smaller tank keeps stored volume down and puts more pressure on the truck schedule.
The usual choices are the tank built into the unit or an auxiliary generator fuel tank rental for extended runtime. Size the tank so that the delivery interval leaves a margin for weather and a late truck. How large that margin should be depends on your supplier, the haul to the site and the contract terms.
The table below compares the two directions on the factors that matter most at a remote site. Read it as a set of questions to answer for each location, since the right balance changes with the load and the access route. The last column lists what to confirm before you commit.
| Factor | Larger tank | Smaller tank | Confirm with |
|---|---|---|---|
| Delivery visits | Fewer | More | Fuel supplier |
| Fuel stored on site | More | Less | Safety lead |
| Buffer for a missed delivery | Longer | Shorter | Burn rate from the log |
| Fuel left unattended | More | Less | Site security plan |
Access roads and weather
Unpaved access roads decide whether a delivery truck arrives. Rain can soften haul roads, and a fuel truck is heavy when loaded. Ask the site team which roads are rated for loaded tanker traffic and who decides when they close. Name an alternate staging point where a smaller vehicle can meet the truck if the main route is shut.
A towable diesel generator can be moved closer to a passable road if a location becomes hard to reach, though that depends on ground conditions and site rules. Discuss the option during planning, not after the first washout. It also helps to confirm who has authority to approve the move.
One route across many locations
With units spread across the footprint, plan fueling as a route with a fixed order of stops. Grouping locations by access road shortens the circuit and makes the log easier to audit. Critical loads, such as commissioning equipment, go early in the route so they are never last in line. Revisit the route whenever a generator is added or moved.
Who owns refueling
Refueling fails when two parties each assume the other has it. Settle the points below in writing before mobilization and tie each one to a named person. Who does what depends on your contract with the general contractor, the fuel supplier and Stag.
- Who orders fuel and who approves the order
- Who accepts the delivery and signs for it
- Who fills each generator and checks the gauge
- Who keeps the fuel log
- Who is called when a delivery is late
Security of stored fuel
Fuel stored at a remote location can be exposed to theft and spills. Place tanks where a staffed area can see them when the layout allows, and confirm fencing, lighting and lock practices with your site security lead. Spill containment and the distance from structures and ignition sources are also questions for the safety lead and the local jurisdiction. Compare delivered quantities with log entries, so a shortage shows up at the next check.
The fuel log
A fuel log turns guesses into a schedule. Each entry should hold the date, location, unit, hour meter reading, gauge reading and quantity added. Review the log at set intervals and compare burn against the original estimate. When a location burns faster than planned, adjust its tank or delivery interval before it runs short.
When a delivery is missed
Assume a delivery will be missed at some point and decide the response while the site is still dry. The log tells you how many operating hours remain at each location. Rank loads by consequence, since an energized inverter test matters more than a lighting tower, and the tiers in solar commissioning load priority show one way to order them. Shed or consolidate lower-priority loads first, then contact the supplier and Stag together so the make-up delivery goes to the most critical location.
Afterward, record the cause, whether weather, road condition or order timing. Share it with the supplier and the site team. Update the buffer and the route so the same gap does not repeat.
Planning the fuel side with Stag
Stag Power Rentals supplies diesel generators from a yard in Dickinson, TX, with a fleet that runs from 20 kW to 2000 kW. Bring your location list, shift pattern and access constraints, and we can work through tank choices and fuel delivery planning for your block site. For a wider look at how we support builds, see our construction industry overview. When the location list is ready, send it through the quote request form.
Frequently Asked Questions
How much fuel will a remote solar site use?
There is no single figure, because burn depends on each generator’s size, load and running hours. Start with the fuel consumption chart for each unit at its expected load. Multiply by the hours implied by your shift pattern, then compare against log readings once the unit runs. Revise the estimate whenever the work or shifts change.
How often should fuel be delivered to a solar site?
The interval depends on tank capacity, burn rate and how reliable your access roads are. Work backward from the burn rate to see how long each tank lasts. Then leave a margin for weather and a late truck. Your fuel supplier and the haul to the site will shape how much margin is practical.
Does OSHA limit how much diesel I can store on a construction site?
OSHA 1926.152 sets rules for approved containers and portable tanks, and it includes quantity limits for flammable liquids stored in rooms and cabinets. The standard is written for liquids with a flashpoint at or below 199.4 °F. Whether it governs your diesel, and how, depends on the fuel, the container and the jurisdiction. Your safety lead should make that call.
Who should own refueling at a large solar site?
One named person should own the fuel log and the delivery schedule. Fueling tasks may sit with the contractor, the fuel supplier or the rental provider, depending on the contract. Write down who orders, who accepts delivery, who fills each unit and who is called when a truck is late. Review the arrangement when the crew or the shift pattern changes.
What should we do if rain stops a fuel delivery?
Check the log to see how many operating hours remain at each location. Rank the loads and shed or consolidate the lower-priority ones first. Contact the supplier and Stag together so the make-up delivery goes to the most critical location. Afterward, record the cause and adjust the delivery buffer.