The Quote That Changed How I Buy Generators
Six years ago, I almost approved the wrong generator purchase. The quote was for a 100 kW standby unit, and it was $14,300 lower than the competing bid. Same voltage. Same sound rating. Same promise of “full startup.” I was ready to sign. Then I read page four and found roughly $9,000 of missing scope. Not a scam. An omission. The quote simply didn’t include the parts of the project that happen after the generator is lifted off the truck. That was the day I stopped comparing generators and started comparing power systems.
Right now, you might be expecting me to say the cheaper quote was awful and the expensive quote was perfect. It’s not that clean. The expensive quote had its own gaps. But the difference between the two numbers taught me more than any sales presentation ever has.
I’m a cost controller, not an electrical engineer. For the past six years, I’ve reviewed almost every generator purchase for our company: standby units for two distribution centers, mobile units for temporary power, and one private-label program where we sold generators under our own name. I keep a spreadsheet with every quote, every change order, and every “small” line item that appeared after we signed. The biggest single cost in that spreadsheet isn’t the generator hardware. It is the gap between buying a machine and delivering a working power system.
“Just Get Me Three Quotes” Is a Trap
Most buyers start with a reasonable instinct: get competitive prices. I used to do the same. I’d ask for a 100 kW generator, wait for three proposals, and compare the bottom line.
The problem is that a quote for “a generator” is not a quote for power availability. One vendor might quote the generator skid only. Another assumes an automatic transfer switch. Another includes a concrete pad and conduit. All three can be right, and all three can show different prices.
I once reviewed two proposals for the same site. Both said “100 kW standby.” The lower one was 16% below the other. It also had no automatic transfer switch in the scope, no startup testing, and no permit allowance. The vendor wasn’t hiding anything. In his mind, those items were electrical work, not generator supply. The more expensive quote covered the system. The less expensive quote covered the hardware. Comparing them by price was like comparing the cost of a car to the cost of a road trip.
Why the Cheapest Quote Is Rarely the Cheapest Project
The deeper issue is that we make purchase decisions before we define the outcome. That works for office chairs. It does not work for a Briggs Stratton generator or any other backup power system.
A generator is an engine and alternator bolted to a base. That is a product. But you are buying an outcome: the facility keeps running when the grid goes down. The outcome includes fuel, transfer switching, electrical connection, commissioning, maintenance, monitoring, and the people who show up when it stops working. If those pieces are not in the quote, they are not missing. They are waiting to become change orders.
Take installation. When someone asks me about a Briggs Stratton generator installation, I tell them the generator is often the clearest part of the bid. It has a nameplate, a catalog number, and known options. Installation is where ambiguity appears. Is the concrete pad included? Conduit length? A generator-rated disconnect? Grounding? Exhaust run? Gas piping? Permits? If the bid doesn’t list those, the bid is an invitation.
Code requirements make this worse. If a supplier says “it meets code,” ask which code and which edition. The National Electrical Code Articles 700 and 702 are common references for standby generator installation. NFPA 110 often comes into play when reliability requirements are high. Verify the edition your local jurisdiction adopted. The point is not to turn you into a code expert. The point is to make the quote state its assumptions in writing.
The Costs I Didn’t Notice Until It Was Too Late
I’ve made this mistake more than once. The first time, we bought a trailer-mounted mobile unit primarily because the price per kilowatt was better than every other option. The sales sheet was clean. Sound rating was fine. Fuel tank was generous. What the sales sheet didn’t say was that the unit was not prepared for cold-weather starts.
In January, that mobile generator was deployed to a site where the temperature stayed below -25°C for six days. At 11 p.m., the facility called: the unit wouldn’t start. It wasn’t a mechanical failure. It was a specification failure. The cold-weather package was not on the drawing because it was not on our requirements. The retrofit and the emergency service call cost several thousand dollars. The loss of trust was more expensive.
Another project taught me the same lesson with load testing. The bid included “start-up,” so I assumed the unit would be verified under load. It wasn’t. Start-up meant “crank it, watch it run, close the breaker.” A generator can do that and still fail when it sees actual load. The testing gap was fixed later at a cost that outweighed the original price advantage.
Here’s the pattern: none of those added costs came from a malicious vendor. They came from a vague spec. And a vague spec is a procurement problem, not an engineering problem.
A Simpler Way to Compare Generator Quotes
The fix was not to buy from a more expensive supplier. The fix was to create a written generator specification guide before asking for proposals. Mine fits on one page. It does not replace engineering drawings. It forces every salesperson to price the same job.
- Outcome: what the power is for, which loads it must support, how fast it needs to pick up the load, and how long it must run.
- Equipment: generator type, output rating, voltage, enclosure, fuel type, and transfer switch requirements.
- Site conditions: ambient temperature range, elevation, sound limit at the property line, and distance from the generator to the service entrance.
- Responsibilities: a line-by-line list of who supplies the fuel line, pad, breaker, conduit, permits, testing, and remote monitoring.
- Proof: what commissioning means, who witnesses it, and what documents have to be delivered before final payment.
If I need a mobile generator specification guide, I adjust for duty cycle instead of one-time fixed outage. I ask for run time at the expected load rather than just tank size. I ask about cold-start aid, service intervals, noise at 7 meters, and the local support plan. A mobile generator distributor can quote a good mobile system or a bad one. The spec guide is what tells them apart.
The same guide applies to standby generator OEM programs. If you are procuring private-label units, add a section for warranty assignment, documentation, model changes, and spare parts. A one-size bulk order can absorb a surprise. A program cannot.
And yes, I still specify Briggs Stratton generators. The dealer support and repair parts network matters more to my long-term cost than the purchase price. If I were only looking at the initial sticker, I’d be back in the same trap.
The Exception I Won’t Pretend Away
This level of process is not for every purchase. If you need a small portable generator for occasional use, buy from a known brand, check the warranty, and move on. A one-page spec guide is overkill.
If this is a generator for life-safety loads, critical operations, or complicated paralleling, call an electrical engineer before talking to a supplier. A checklist is not a substitute for an engineer.
What I know from six years of spreadsheets is this: the most expensive generator projects fail before the concrete is poured. The failure is not usually a weak engine or a cheap alternator. It’s a mismatch between what the quote included and what the site needed. You can’t fix that mismatch by asking for a better price. You fix it by asking for a better specification.
So when someone sends you a generator quote, circle every line that isn’t the generator price. Ask what it means. Ask what changes if the site assumptions are wrong. Ask what “delivered and installed” includes. You may not make friends. But you won’t make a very expensive phone call at 11 p.m. either.
