San Diego Generators

It depends on what you want running at the same time rather than on your square footage. Essentials only, meaning refrigerator, furnace, internet and some lighting, needs about 10kW to 14kW. A typical San Diego house on 200 amp service with one air conditioning compressor lands on 22kW to 26kW. Add a second compressor, a pool, a well pump or an EV charger and you are into 30kW and up on a liquid-cooled unit. The number that matters is starting kW, not running kW, because motors draw two to three times their running figure for the first few seconds. Our site visit and load calculation are free.

A portable is a wheeled unit you store, roll out, fuel and start by hand, connected either by extension cords or through a permitted inlet and interlock. It costs a few hundred to a few thousand dollars and somebody has to be home. A standby unit is permanently installed on a pad, plumbed to natural gas or propane, and wired through an automatic transfer switch, so it starts within about ten seconds of an outage and shuts down on its own afterwards. Standby units are quieter, far more powerful and completely automatic.

Natural gas wherever a meter exists, because it never runs out, needs no tank and requires no deliveries during an emergency. Propane is the rural answer where there is no gas main, and it stores for years, but tank size sets your runtime so a 500 gallon tank beats a 250 for a multi-day shutoff. Diesel produces the most power per footprint and the best fuel efficiency, which is why commercial and industrial units use it, but it needs on-site storage and periodic fuel polishing to stay usable.

We install Generac, Kohler, Cummins, Champion and Briggs & Stratton generators. We service those plus Onan, Winco, Caterpillar, MTU and most other diesel and gas plant, whoever sold or installed it. Generac has the widest residential range and the deepest parts network in the county, Kohler runs heavier iron with a longer standard warranty, and Cummins is the standard engine family on the commercial and industrial side.

Most complete residential installs in San Diego County run between $5,000 and $15,000. A 14kW to 18kW unit on a simple natural gas lot with a load-center transfer switch sits near the bottom of that range; a 24kW to 26kW unit with a service-rated 200A automatic transfer switch, a long gas run and a panel upgrade sits near the top. The quote covers the generator, the pad, the gas line, the transfer switch, the electrical work, the permit and commissioning, itemized line by line.

The on-site work is one to three days for a residential standby unit. From signed quote to a commissioned generator, plan on four to eight weeks, most of which is permit turnaround plus lead time on the unit itself. HOA architectural review can add two to four weeks, so we submit that package alongside the permit rather than after it. Commercial and industrial projects run longer because of engineering, air district permitting and the shutdown window for the tie-in.

Yes. Every jurisdiction in San Diego County requires an electrical permit for the transfer switch and tie-in, plus a mechanical or plumbing permit for the gas line. Diesel units also need an air district permit. We pull all of them, submit the plan set, coordinate the inspection and handle corrections. An unpermitted transfer switch shows up during escrow and can complicate a homeowner insurance claim after a fire, so it is not a corner worth cutting.

It is the switch between the utility feed and your panel that decides which source powers the building. It watches utility voltage, signals the generator to start when the power drops, waits for the engine to stabilize, then moves your load across. When utility power returns and stays steady, it transfers back and shuts the generator down after a cooldown. It also physically prevents generator power from backfeeding onto the utility line, which is a safety requirement and the reason any permanent install needs one.

Manufacturers require roughly three feet of clearance at the sides and rear and five feet from any window, door or vent, with clear space overhead and nothing combustible against it. Local code adds distances from property lines, gas meters and air intakes. That usually means the side yard on suburban lots and the rear corner on narrow coastal lots in Encinitas, La Jolla, Coronado and older Chula Vista. Placement is checked on the site visit because it is the constraint that most often changes the design.

A modern air-cooled residential unit runs about 60 to 66 dB measured at 23 feet under load, which is roughly a central air conditioning condenser, and closer to 70 dB during its weekly exercise cycle, which lasts five to twelve minutes. Liquid-cooled and commercial units are louder and sit further from occupied space. We set the exercise cycle to a reasonable weekday hour and orient the exhaust away from neighboring windows, which prevents almost every noise complaint.

By size tier: a 20kW to 25kW towable unit is broadly $150 to $350 a day, 50kW to 100kW runs roughly $350 to $800 a day, and 150kW to 300kW is usually $800 to $1,800 a day. Anything from 400kW to 1MW is quoted individually and normally taken monthly. Weekly and monthly rates are much cheaper per day, with the crossover at about a week. Delivery, connection, a load test and collection are inside the rate.

Construction sites before the utility energizes the service, weddings and private events at ranch and estate venues, festivals and film production, planned utility shutdowns and panel upgrades, plant shutdowns and seasonal peaks, businesses covering a permanent unit that is down for repair, and properties pre-staging power for fire season shutoffs. Anything with an end date is almost always cheaper to rent than to own.

Single-day rentals arrive fueled and are returned as delivered, with fuel in the price. Multi-day and long-term rentals quote fuel separately on actual consumption, with scheduled refill delivery included in the rate and remote monitoring on the tank so we dispatch before you run low. Emergency same-day refills carry a trip charge because they sit outside the route. There is no environmental fee or fuel surcharge added at the end.

Annually at minimum for a residential standby unit: engine oil and filter, air and fuel filters, spark plugs, coolant, battery load test, transfer switch inspection and a run under load. Manufacturers also set hour-based intervals, typically an oil change every 100 to 200 running hours, and weekly exercise cycles accumulate those hours faster than owners expect. Commercial and code-mandated systems go on quarterly or semi-annual visits plus an annual load bank test. Missing annual service voids most warranties.

On natural gas, indefinitely, as long as the main stays live, which is why we prefer it wherever a meter exists. On propane, it comes down to tank size: a whole-house load burns roughly two to three gallons an hour, so a 500 gallon tank covers several days and a 250 gallon tank does not. A gasoline portable runs 8 to 12 hours per tank at half load. A diesel unit burns roughly 7 percent of its rated kW in gallons per hour at full load, so a 1,000 gallon tank on a 500kW machine gives about 28 hours flat out.

Appraisal data generally puts a permanently installed standby generator at roughly a 3 to 5 percent increase in home value, and homes with one tend to sell faster in areas that see regular outages. In the parts of San Diego County inside the public safety power shutoff footprint, Escondido, Poway, Ramona, Alpine and the eastern hills, buyers read it as infrastructure rather than a luxury feature. Keep the permit records and the service history, because that is what an appraiser will ask to see.

Yes. We work with several third-party lenders specializing in home improvement and standby power, with terms typically from 24 to 144 months on approved credit, including deferred-interest promotions at certain times of year. Manufacturers run their own rebates and financing offers periodically and we will tell you when one is live. Most households compare the monthly payment against what a single bad outage costs them in spoiled food, lost work and a hotel.

It depends where you are in the county. West of the 15 the grid is reasonably reliable and the honest answer for many households is a portable and an interlock rather than an automatic install. East of it, inside the shutoff footprint, outages are planned, long and reliably timed for the hottest, windiest week of the year, and the calculation looks completely different. We will tell you which side of that line your address sits on before quoting anything.