San Diego · Generator Services
Industrial Generators
Diesel prime and standby power from 100kW to 2MW for manufacturing, cold storage, logistics and utility work, with load bank testing and fuel management.
Industrial Generators · San Diego
What Industrial Power Systems Cover
Industrial generators are a different animal from anything residential. The units are diesel, they run from about 100kW to 2MW, they sit on a fuel tank rather than a gas line, and they are specified around a duty cycle rather than a wattage. A standby unit that idles all year and covers a facility during an outage is engineered differently from a prime power unit that carries a load continuously for weeks on a site with no utility service at all. We supply, install, service and rent both across San Diego County: manufacturing on Otay Mesa, cold storage and logistics in National City and Miramar, water and wastewater plants, telecom and data facilities, defense contract work, and grid-independent sites out east. Cummins generators dominate this end of the market, alongside Caterpillar, Kohler and MTU, and the engines are the same families you find in heavy equipment. Whether a job ends up as a purchase or an industrial generator rental usually comes down to how long the requirement lasts, and we quote both so the comparison is real.
Why Go With Us For Industrial Power
At this size, the specification is where jobs are won or lost. A generator sized on connected load rather than on the actual demand profile is tens of thousands of dollars of unnecessary iron that then spends its life wet stacking because it never sees enough load to run properly. A generator sized too tight browns out the plant every time a large motor starts. We build the sizing off the real load, including motor starting characteristics, harmonic content from variable frequency drives and any non-linear load from UPS systems, and we bring a load bank to prove the result rather than certifying a unit because it started. Our techs work on diesel every week rather than occasionally, we carry fuel polishing equipment, and our service agreements have defined response times rather than a vague promise of priority.
- Diesel units from 100kW to 2MW, in standby, prime and continuous duty ratings.
- Cummins, Caterpillar, Kohler and MTU, sold, installed and serviced, plus service on whatever you already run.
- Load calculations that account for motor starting, variable frequency drives and non-linear UPS loads.
- On-site load bank testing to the full nameplate rating, with documentation for code-mandated systems.
- Fuel polishing, tank cleaning and scheduled fuel delivery, so stored diesel is actually usable.
- Service agreements with defined response times, and a rental fleet to cover a unit that is down for repair.
Reasons To Install Industrial Power
Facilities end up here for reasons that are usually financial or legal rather than about comfort:
Downtime costs more per hour than the generator costs per month
A production line that stops mid-run, a cold store full of product, a plating or coating process that ruins a batch on interruption. Once somebody has actually calculated the hourly number, the decision is usually already made.
Code requires standby power
Hospitals and surgical centers, high-rise life safety systems, wastewater lift stations, fuel stations and certain telecom and data facilities are legally required to have backup power and to prove annually that it works under load.
There is no utility service at the site
Remote sites, quarries, construction of a whole development before the utility energizes, and temporary facilities. That is prime power, and it is a continuous-duty specification with a fuel plan behind it.
The utility supply is not reliable enough
Some industrial feeders see enough voltage sag and brief interruptions to damage sensitive process equipment even when nothing looks like a real outage. Generators plus proper transfer equipment take that off the table.
Cold chain or biological material is on site
Cold storage, biotech freezers, laboratory sample archives and pharmaceutical stock. The value at risk is often larger than the entire electrical system that protects it.
Peak shaving or demand management
Running a diesel unit during peak tariff windows can be cheaper than paying demand charges, depending on your rate schedule and air quality permits. It only works with the numbers checked properly, and we will tell you when it does not.
Send us your single line diagram or your load schedule and we will size the unit and quote the installation against it. Call: (619) 257-2867
How An Industrial Project Runs
Longer than a residential install, and most of the risk sits in the first stage.
1. Load study and specification
We review the single line, the load schedule and the equipment list, and where the profile is unclear we log actual demand on site. That produces the kW and kVA rating, the duty class, the transfer scheme and the fuel volume, which is the whole basis of the project.
2. Permits, air quality and site prep
Diesel units in San Diego County need an air district permit as well as building and electrical permits, and the requirements differ for standby versus prime duty. We handle the applications, the pad or foundation design, the fuel tank arrangement and the spill containment.
3. Installation and tie-in
Setting the unit, running the feeders, installing the transfer equipment and the paralleling gear if the design calls for it, plumbing the fuel system, and coordinating the shutdown window with your operations so the tie-in happens when it hurts least.
4. Load bank commissioning and handover
A full resistive load bank test at the nameplate rating, with data logged and documented for your records and your inspector. Then operator training, a maintenance schedule, and a spares list for the parts you would not want to wait on.
Duty Ratings, Fuel, Testing And Paralleling
The technical decisions behind an industrial installation:
Standby, prime and continuous ratings
Standby rating assumes emergency use with a variable load and limited annual hours. Prime rating assumes unlimited hours at a variable load, which is what a site with no utility service needs. Continuous rating assumes a constant load indefinitely. The same physical engine carries a different kW figure under each, and buying a standby-rated unit for prime duty is the most expensive mistake in this category.
Diesel fuel systems and polishing
Stored diesel degrades. Water condenses in the tank, microbial growth follows, and the result blocks filters at exactly the wrong moment. Tanks need polishing every one to three years depending on turnover, plus fuel testing, water removal and biocide treatment. We do this as part of a service agreement rather than as an emergency.
Load bank testing
A load bank applies a controlled resistive load so the unit runs at full rated output. It proves capacity, burns off wet stacking from years of light-load running, exposes cooling and fuel problems before an outage does, and generates the documentation that code-mandated systems have to produce annually.
Wet stacking and light-load running
A diesel engine that only ever runs at 20 percent load never gets hot enough to burn fuel completely, and unburned fuel and carbon accumulate in the exhaust. The symptoms are a wet exhaust stack, reduced output and eventual damage. Annual load bank testing is the cure, and it is the reason we push for it on lightly loaded standby units.
Paralleling and redundancy
Multiple smaller units in parallel give you redundancy, better efficiency across a varying load, and the ability to service one machine without losing coverage. Paralleling switchgear costs more up front and it is the right architecture for facilities where a single point of failure is unacceptable.
Emissions and Tier compliance
California air quality rules govern what can be installed and how many hours it can run. Tier 4 Final certified units are required for many applications and for most public works contracts, and standby units have permitted hour limits for testing and maintenance. We check this before quoting, because it changes both the equipment and the paperwork.
Remote monitoring
Controller-level monitoring reports fault codes, fuel level, battery condition, run hours and exercise results to us and to you. On a large diesel unit this is the difference between finding out about a problem during a scheduled visit and finding out about it during an outage.
What Industrial Generators Cost
Industrial projects are quoted individually, but the drivers are consistent:
- Output and duty rating. A 150kW standby unit and a 750kW prime-rated unit are different orders of magnitude, and the duty class changes the price of the same engine.
- Fuel storage. Base tanks, day tanks, bulk storage, spill containment and the piping between them are a substantial line item on any large install.
- Transfer and switchgear. A single automatic transfer switch is straightforward; paralleling switchgear with multiple sources and load shedding is an engineering package.
- Site work. Foundations, seismic anchorage, weather and sound enclosures, crane access and conduit runs across a working facility.
- Permits and air quality. Building, electrical and air district permitting all apply, and emissions requirements can dictate the equipment itself.
- Service and testing. Annual load bank testing, fuel polishing and a scheduled maintenance agreement are ongoing costs worth budgeting from day one.
If the requirement is temporary, or if you need power while a permanent system is being built, an industrial generator rental is usually the cheaper path and we will price it alongside the purchase. Smaller facilities are often better served by a commercial standby system sized to the critical load, and if you are unsure which category a site falls into, the full range of generator sales, service and rentals we cover is the quickest way to place it.
Frequently Asked Questions
What size industrial generator does my facility need?
It comes from a load study rather than from the service size. We look at the connected load, the actual demand profile, the starting characteristics of the largest motors, and any harmonic or non-linear load from variable frequency drives and UPS systems. Where the profile is not documented we log real demand on site for a week. Sizing off the main breaker rating is how facilities end up with a machine twice the size they need that then wet stacks because it never sees load.
What is the difference between standby, prime and continuous rating?
Standby rating covers emergency use with a varying load and limited annual run hours. Prime rating covers unlimited hours at a varying load, which is what a site with no utility connection needs. Continuous rating covers a constant load indefinitely, typically for base-load generation. The same engine is rated lower as you move from standby to continuous, because the harder the duty, the more margin it needs. Buying a standby-rated machine for prime duty shortens its life dramatically.
How often does an industrial generator need a load bank test?
Annually for most facilities, and it is a legal requirement for code-mandated emergency systems such as hospitals, high-rise life safety and certain telecom and data sites. NFPA 110 sets out monthly exercise requirements plus an annual test at load. Beyond compliance, an annual load bank test is what proves a lightly loaded standby unit will actually carry the facility, and it burns off the carbon build-up from years of light-load exercise runs.
Do I need an air quality permit for a diesel generator?
In San Diego County, almost certainly yes. The air district permits stationary diesel engines, and the requirements differ between emergency standby use, which has permitted hour limits for testing and maintenance, and prime power, which is regulated more tightly. Tier 4 Final certification is required for many applications and for most public works contracts. We check this before specifying anything, because the emissions requirement can dictate the equipment.
How long can an industrial generator run on a tank of fuel?
A rough rule for diesel is about 7 percent of the rated kW in gallons per hour at full load, so a 500kW unit burns roughly 35 gallons an hour flat out and considerably less at partial load. A 1,000 gallon base tank on that machine gives about 28 hours at full load. Most facilities specify 24 to 72 hours of on-site storage and arrange a fuel contract for anything longer, which we set up as part of the service agreement.
Can you service the generator we already have?
Yes, whoever built it and whoever installed it. Our techs work on Cummins, Caterpillar, Kohler, MTU, Detroit and Onan diesel plant regularly, and we carry the common wear parts on the truck. If a unit is beyond economical repair we will say so with the numbers rather than quoting a rebuild that costs most of a replacement. While it is down we can stage a rental unit so the facility is not exposed.
Need a generator in San Diego?
Tell us the address and what you need backed up, and we will come out and put a free estimate in your hands.
Or call us now: (619) 257-2867