Backup Generator FAQs
What size backup generator do I need for my home?
For most Central Texas homes, you’ll need an 18–22 kW generator to cover heating, lights, refrigeration, and daily use appliances. Smaller 14–16 kW units often fall short once you apply the 70% safe load rule. Larger homes (3,500+ sq. ft.) or homes with multiple HVAC units, pools, or EV chargers may require 24 kW or higher.
How much does a whole-home generator cost in Central Texas?
Most homeowners spend $9,500–$15,000 total for a professionally installed whole-home standby generator. Price depends on generator size, fuel type (natural gas vs propane), and site conditions. Our quotes include installation, permits, plumbing, and electrical work — no hidden dealer markups.
Is a 14 kW generator enough for a house?
In most cases, no. A 14 kW generator only delivers about 40 usable amps once you apply the 70% safe load rule. That’s barely enough for one HVAC unit and a few lights. For true whole-home backup power, 18–22 kW is the minimum recommended size.
Do I need a permit for generator installation in Austin or Central Texas?
Yes. Standby generator installations require electrical and plumbing permits in most Central Texas cities. Our team handles all permitting and coordinates inspections. We guarantee a 100% inspection pass rate because we don’t cut corners.
What’s the difference between a standby generator and a portable generator?
Standby generators are permanently installed, automatic, and sized to power most or all of your home. They run on natural gas or propane.
Portable generators are smaller, run on gasoline, and require manual setup. They usually power only a few appliances at a time.
Which fuel is better for a backup generator: natural gas or propane?
Natural Gas: Unlimited supply through utility lines, no refills needed.
Propane: Reliable even if utilities fail, but requires an on-site tank and refills.
We’ll recommend the best option based on your property and access.
How long can a standby generator run during an outage?
On natural gas, a generator can run indefinitely as long as utility service is available.
On propane, runtime depends on tank size. A 500-gallon tank can power an average home for 1–2 weeks.
What brands of generators do you install?
We work with leading brands including Generac, Kohler, and Cummins. Because we’re not tied to a single dealer, we recommend the unit that best fits your home’s needs instead of pushing one brand.
How much maintenance does a backup generator need?
Generators should be:
Run monthly for 10–15 minutes.
Professionally serviced and load tested once a year.
Checked for oil, coolant, and filter changes on the manufacturer’s schedule.
How fast does a standby generator turn on during an outage?
Most standby generators switch on automatically within 10–15 seconds of detecting a power outage, keeping your home powered without manual intervention.
Why choose Weatherproof Generators over a dealer?
We cut out the middleman — no dealer markups.
Licensed electrical and plumbing companies handle every install.
100% passed inspection rate.
Correctly sized systems that actually power your home.