If you're looking at a Briggs & Stratton generator and you haven't first determined whether you need a portable or a standby unit, you are about to make the same mistake I did in 2022. It's not about picking the 'best' generator. It's about picking the right type, and then everything else—wattage, features, budget—falls into place.
I handle equipment procurement for a mid-sized property management group. We maintain about 40 commercial and residential buildings across two states. In my first year (2022), I thought I had it figured out. I ordered a 12kW Briggs & Stratton Storm Responder generator for a critical commercial tenant—a medical records facility that absolutely cannot lose power. It looked like a solid choice. Dual fuel, a good brand, 12,000 watts. What could go wrong?
What went wrong is the tenant wanted a standby generator. The Storm Responder is a high-end portable. Big difference. I had ordered a $2,400 portable unit with a transfer switch that wasn’t code-compliant for their automatic needs. Re-spec’ing the job, the installation, and the return shipping cost roughly $3,200. That's a number I don't forget.
So here's the framework I now use before ever looking at a model number. It won't make you an electrical engineer, but it will keep you from burning budget on the wrong gear.
The Most Important Question: Portable or Standby?
This is the divide most people skip. They see a wattage number and a price tag and stop there. But the application dictates the hardware.
Portable Generators (like the Storm Responder)
These are for temporary, manual power. You wheel it out, plug in extension cords or use a manual transfer switch, and start it yourself. They're great for construction sites, tailgates, or powering your house for a weekend during an ice storm. The Briggs & Stratton Storm Responder series is excellent here. Their dual-fuel capability (gasoline or propane) is a serious advantage when fuel supply is uncertain.
A few notes from my experience:
- They are loud. Fine for a job site, bad for a residential neighborhood at 2 AM.
- They require manual start. If you're not home, the power doesn't come on.
- Fuel storage is a pain. Gasoline degrades. Propane tanks are bulky.
Standby Generators (like the Elite Series)
These are permanent, automatic power. They detect a power outage, start themselves, and switch on your building's circuits through an automatic transfer switch (ATS). You don't touch them. They are not the same as a portable.
- They are quiet. Housed in a weatherproof enclosure.
- They tap your existing fuel line (natural gas or LP). No storing gasoline.
- Require professional installation. Permits, concrete pad, electrician, and plumbing. This adds $1,500–$4,000 to the cost.
If you need automatic coverage for a business or home, you want a standby unit. Period. My $3,200 mistake was trying to force a portable to do a standby's job. It didn't work.
Wattage: How to Not Overspend
Once you've settled on the type, you need to figure out the wattage. The biggest mistake here is adding up running watts and buying a generator for that number. Ignore running watts. Look at starting (surge) watts.
Motors—refrigerators, well pumps, air conditioners—need a jolt of power to start. That jolt can be 2-3 times the running wattage. A 7,000-watt portable might handle a fridge (800 running watts), but it won't start the pump if it surges to 2,500 watts.
My rule of thumb: Add up the starting watts of everything you want to power, then add 20% as a buffer. For a typical home running a fridge, well pump, furnace, lights, and some outlets, you're looking at a 12-17kW standby unit. For an office with a few computers and a server rack, a 10-12kW might be enough. For a whole medical facility, we're talking 20-26kW.
Here's where the Briggs & Stratton lineup makes sense. Look at the Elite Series for residential backup. Look at the Storm Responder for portable power. The wattage ranges overlap significantly, which is why you have to pick the type first.
The Inverter Question (A Common Point of Confusion)
Let's talk about inverters. A lot of people ask about the difference between an inverter generator and a regular generator.
Forget the technical explanation about AC-to-DC-to-AC conversion. The practical difference is this:
- Standard generators produce a raw AC power. It's fine for tools, lights, and resistive heaters. But it can have voltage fluctuations that are bad for sensitive electronics (laptops, medical devices, modern appliance control boards).
- Inverter generators produce cleaner power (less than 3% total harmonic distortion, generally). They are also more fuel-efficient because the engine can speed up or slow down based on load.
Here's the expert take: If you are powering anything with a computer chip, use an inverter or a standby unit.
I'll admit, I'm not an electrical engineer, so I can't speak to the specific sine wave curve. What I can tell you from a procurement perspective is that a $500 fridge's control board is not worth ruining over a $100 savings on a non-inverter portable unit.
For most residential backup scenarios, a standby generator (like the Elite) is the safer bet over a portable. The standby units already meet modern grid-quality power standards. It's the portable units where you have to be more careful.
Three Hidden Costs No One Tells You About
- The Concrete Pad. A standby generator needs a stable, flat, non-combustible surface. Our dealer charged $450 for a 4x6 foot pad. It wasn't in my initial budget.
- The ATS Installation. The automatic transfer switch is separate. Installation by a licensed electrician cost $850. Your local codes may vary, but budget for it.
- Propane Tank Rental (if using LP). If you don't have natural gas, you need a propane tank. You often have to lease them from a supplier. That's an annual fee, not a one-time cost.
When My Advice Doesn't Apply
This advice assumes you are buying for a building that needs life safety or critical business continuity. If you're just buying a generator for camping, a tailgate, or a few power tools on a job site, the rules change. A $700 open-frame portable will do the job just fine.
If you're a dealer reading this, ignore my wattage math—you already know your customer's load profile better than I do. My advice is from a buyer's perspective, not an installer's.
My final piece of advice: Call a local dealer and ask for a site assessment. Most will do it for free. They'll check your load panel, your fuel availability, and your space requirements. It costs nothing and will save you from ordering the wrong unit. I learned that the hard way.