The worst time to shop for a generator is during an outage. That's when lead times stretch, everything in stock is the wrong size, and installers are booked solid. The best time is a quiet stretch of shoulder season — which, in northern Arizona, means right now, before either monsoon season or the first serious snow.
Why backup power matters more up here
Our outages have two profiles. Monsoon outages are short and violent: a lightning strike or a downed limb, power back in a few hours. Winter outages are the ones that cause damage. A line down in heavy snow on a rural road can mean a day or more, and a house without heat at 15 degrees is on a clock — pipes on exterior walls freeze, and well pumps and septic systems stop.
Add a home office, a medical device, or a full freezer, and the calculation gets simple. The question usually isn't whether backup power is worth it, but how much of the house you want to keep alive.
Portable, inverter, or standby
- Portable generators are the cheapest way in, and fine for a few appliances through extension cords. They need to be started manually, refueled every several hours, and run at least 20 feet from the house — never in a garage, even with the door open.
- Portable with an interlock or manual transfer switch is the sweet spot for a lot of homes. A licensed electrician installs a code-compliant connection so you can safely power selected circuits — furnace, well pump, fridge — from a portable unit without cords running through a window.
- Standby generators sit on a pad, run on propane or natural gas, and start themselves within seconds of an outage through an automatic transfer switch. This is what you install if you travel, if the house can't be left cold, or if you simply don't want to think about it.
Sizing is about surge, not just running watts
Motors — well pumps, furnace blowers, refrigeration compressors — draw several times their running wattage for the first moment of startup. A generator sized only to the running total will stall or brown out when the pump kicks on. A proper load calculation looks at what actually has to run, what might start at the same time, and the largest motor in the house.
This is also where whole-house versus essential-circuits gets decided. Backing up a furnace, well pump, fridge, and a few lighting and outlet circuits is dramatically cheaper than backing up central air and an electric range, and it covers what most families actually need.
The part that has to be done right
Every generator connection needs a transfer switch or a listed panel interlock. This is not optional and it is not a formality: without it, generator power can backfeed onto the utility line and injure a lineworker restoring your service. It is also the difference between a permitted, inspected installation and one your insurer may take an interest in.
Our generator installation and maintenance page covers sizing, transfer switch options, and the annual service that keeps a standby unit from failing the one morning you need it.
When to bring in a professional
Bring in a licensed electrician for any transfer switch or interlock, any new circuit for a generator, and the load calculation that determines size. Fuel and pad work is usually coordinated alongside it.
If you want a plan in place before the next storm, call us at (928) 563-6237 and we'll walk through what your house actually needs to keep running.