Basalt ID Standby Generator Installation & Maintenance Guide

Estimated Read Time: 10 minutes

Power outages are stressful. Freezers thaw, well pumps stop, and space heaters sit silent. If you are wondering how to choose the right size whole house generator, you are in the right place. In this guide, you will learn a simple way to estimate your load, avoid costly oversizing, and pick the fuel, transfer switch, and location that match your home and climate. Bonus: get local insight from Idaho Falls experts who install and maintain Generac systems year round.

Why generator size is the decision that decides everything

The right size whole home generator does three things. It starts heavy motors without dimming lights, it runs your essentials efficiently, and it stays within manufacturer and code requirements. Too small and refrigerators short-cycle, well pumps stall, and the unit trips. Too large and you burn unnecessary fuel and overspend on equipment.

At First Call Jewel, we sell, install, and repair Generac generators throughout Southeastern Idaho. Our installation process begins with load, fuel, and transfer strategy. We verify correct size, adequate fuel supply, automatic transfer switch integration, maintenance plan, and proper clearances. When those five boxes are checked, your generator performs as promised.

Start with your priorities: what must run during an outage

Make two lists. First, must run circuits that protect safety and property. Second, nice to have comfort loads that can wait.

1. Must run examples
2. • Furnace blower or boiler circulator
   • Refrigerator and deep freezer
   • Well pump or sump pump
   • Medical devices and core lighting
2. Nice to have examples
3. • Electric range or oven
   • Clothes dryer
   • Central AC or multiple mini splits
   • Garage door, shop tools, and EV charging

Walk your panel and label these circuits. Mark the breakers. This is how you decide between an essential loads system and true whole home coverage. Many Idaho homeowners choose a whole home unit with load management modules so large appliances are sequenced automatically.

Understand running watts vs starting watts

Most appliances list running watts. Motors also have starting watts, sometimes 2 to 3 times higher. A 1 horsepower well pump might run at 1,000 watts but need 2,500 or more to start. Furnaces, freezers, and compressors behave the same.

To size correctly, calculate both:

1. Add up running watts for your must run list.
2. Identify the single largest motor load and use its starting watts as the headroom buffer.
3. Add 20 percent margin for weather and altitude. Southeastern Idaho sits on the Snake River Plain at higher elevations than many factory baselines, and cold snaps thicken lubricants, which increases start demand.

Your goal is a generator that handles the highest probable start event without struggling, while cruising efficiently at partial load the rest of the time.

What common whole home sizes actually power

Every house is different, but patterns help. Use these examples as conversation starters, not final answers.

• 14 to 16 kW
• • Gas furnace or boiler, fridge, freezer, lights, outlets, microwave, well or sump pump, one or two small window ACs or a single mini split using load management.
  • Works well for many 1,200 to 2,200 sq ft homes with gas heat in Idaho Falls, Ammon, Rigby, and similar neighborhoods.
• 18 to 22 kW
• • Everything above plus central AC up to modest tonnage, larger well pumps, electric water heater with management, and more convenience circuits.
  • A strong fit for 2,000 to 3,500 sq ft homes or small ranch properties around Pocatello, Chubbuck, Rexburg, and Blackfoot.
• 24 to 26 kW and above
• • Whole house coverage for bigger homes, heavier air conditioning, shop circuits, or multi-freezer setups. Often paired with load shedding modules to prioritize essentials.
  • Consider for rural properties near Saint Anthony, Shelley, and Victor where wells, heat tape, and livestock support equipment must start reliably.

Right-sizing is not guesswork. We confirm real loads with nameplate data, clamp meters, and start profiles from your HVAC equipment.

Fuel choices: natural gas vs propane for Southeastern Idaho

Both fuels work well when the system is designed around actual demand and storage.

• Natural gas
• • Convenient and steady supply in most city neighborhoods.
  • Check pipe sizing and meter capacity to confirm flow during start peaks.
  • We verify line size and regulator settings during the site visit.
• Propane
• • Ideal for rural cabins or where natural gas is not available.
  • Requires adequate tank size to keep vaporization rates up in subzero weather.
  • Larger tanks or dual tanks improve cold weather performance.

Our team evaluates gas piping, regulator capacity, and storage to ensure adequate fuel supply. We have maintained Generac units through negative temperatures. In cold snaps, accessories like a battery warmer or insulator can prevent start failures, a tip many customers appreciate after the first deep freeze.

The ATS is the brain of a safe system

An automatic transfer switch, or ATS, senses an outage and starts the generator. It transfers load to generator power, then returns to utility when power is restored. This keeps generator and utility power safely separated. Your choice of ATS influences sizing and coverage.

• Whole home ATS with service disconnect covers the entire panel. Pair it with load management to prevent overloads.
• Essential loads subpanel with ATS feeds only your must run circuits. This can allow a smaller generator without sacrificing protection.

We install, integrate, and test ATS equipment to manufacturer spec and code. A proper ATS plan lets you buy the right size generator instead of the biggest one on the shelf.

Placement, clearances, and code compliance

Location matters as much as size. The generator needs proper clearances for exhaust and service access, correct pad height, and routing that protects gas and electrical lines. We confirm this during the site assessment and follow manufacturer requirements and local code. That includes:

1. Clearances to windows, doors, and vents for safe exhaust.
2. Conduit paths that avoid flooding and snow loads.
3. Gas line sizing, regulator placement, and shutoff access.
4. Bonding, grounding, and neutral switching to match ATS type.

We secure permits where required and provide a final test with simulated outage before handoff. Our work is backed by a 100 percent satisfaction guarantee.

Budgeting for total cost of ownership

Think beyond equipment price. A dependable system includes installation engineering and ongoing care.

• Upfront costs
• • Generator, ATS, concrete pad or composite base
  • Gas piping and electrical materials
  • Permits and commissioning
• Ongoing costs
• • Annual inspection and maintenance per manufacturer guidance
  • Oil, filters, plugs, battery, and firmware updates
  • Occasional load bank test for lightly loaded units

Right-sizing reduces fuel burn and wear. Oversized units can short-cycle and accumulate moisture in the engine and exhaust, especially in light duty homes. The most affordable generator is the one that is correctly matched to your true load.

Professional sizing checklist we use on every job

Here is the process our Idaho Falls team follows before recommending a kW rating.

1. Inventory and verify nameplate data for HVAC, pumps, refrigeration, and key circuits.
2. Calculate running watts and identify the largest motor start load.
3. Confirm gas meter or propane storage capacity for winter conditions.
4. Select ATS type and strategy for whole home vs essential circuits.
5. Design placement with proper clearances and service access.
6. Review maintenance plan and owner responsibilities.
7. Present options with and without load management modules.

We travel to remote locations and rural cabins, and we bring the same checklist to every site so your system performs when you need it most.

Maintenance planning that protects your investment

A generator is a safety device. It deserves a service plan. We recommend annual inspections to keep everything in working order. Many of our customers schedule spring or fall visits so their unit is ready for storm season and cold snaps. Maintenance includes oil and filter service, battery testing or replacement, valve checks per schedule, firmware updates, and a full exercise test under load. Proactive steps like a battery insulator help in deep cold.

Our evidence is simple. Customers across Southeastern Idaho report efficient annual service, quick diagnostics when a unit fails to start, and reliable performance after preventive care. That is why many homeowners ask the same technician to return year after year.

DIY calculators vs a professional site visit

Online calculators are useful for ballpark numbers, but they do not check gas meters, altitude, or starting loads. They cannot see that your well pump is three wire with a control box or that your furnace blower draws more at high speed. A professional visit removes guesswork.

What you get from a First Call Jewel assessment:

• Accurate kW sizing based on real loads and starting profiles
• Fuel supply verification for winter conditions
• ATS design that fits your goals and budget
• Code compliant installation plan with clearances and permitting
• A maintenance schedule that keeps warranties intact

If you are in Idaho Falls, Pocatello, Rexburg, Ammon, Chubbuck, Blackfoot, Saint Anthony, Rigby, Shelley, or Victor, we can be on your driveway quickly with a clear plan and a single accountable team.

What Homeowners Are Saying

"Home backup generator install. The tech was very knowledgeable, workmanship was excellent. Very personable, and friendly. Nothing but praise from my end. It’s the way this company has been every time I’ve had them do things for me. Great work."
–Thomas M., Generator Installation

"Clint installed a generac generator. He was very professional. He had a great attitude. His work was outstanding he showed us how to operate the generator when finished."
–Douglas S., Generator Installation

"Spencer was able to quickly diagnose why our Generac generator failed to start when we lost power 2 mornings ago. He had what he needed to repair the problem and the repair was completed in a timely manner."
–Cathy J., Generator Service

"In April installed home generator. Tim came to do schedule maintenance today. His work was efficient and thorough."
–Jerry M., Generator Maintenance

Frequently Asked Questions

How do I calculate the right generator size for my home?

List your must run circuits, total their running watts, then add the highest motor starting watts and a 20 percent margin. A site visit confirms the final number.

Do I need a whole home generator or an essential loads setup?

If budget is tight or your loads are light, an essential loads subpanel works well. For larger homes, a whole home ATS with load management offers full coverage.

Which fuel is better, natural gas or propane?

Both are reliable. Use natural gas when available and pipe size allows it. Use propane in rural areas with a properly sized tank for cold weather.

How often should a standby generator be serviced?

Schedule annual inspections with oil, filter, and battery checks. Exercise the unit under load and update firmware to keep warranties valid and starts reliable.

Will a generator run my central air conditioner?

Yes, if sized correctly and paired with load management. Your technician will check condenser tonnage and starting amps before recommending a kW size.

Conclusion

Choosing the right size whole house generator protects your comfort, food, and safety during outages. You now know how to total loads, account for starting watts, and plan ATS, fuel, and placement. For a precise answer tailored to your home in Idaho Falls and nearby cities, schedule a professional assessment today.

Call to Schedule

Ready for a dependable solution sized right the first time? Call First Call Jewel at (208) 497-0656 or visit https://www.firstcalljewel.com/. Our Generac specialists will size, install, and maintain a code compliant system that fits your budget and home.

Call now: (208) 497-0656 • Book online: https://www.firstcalljewel.com/ • Serving Idaho Falls, Pocatello, Rexburg, Ammon, Chubbuck, Blackfoot, Saint Anthony, Rigby, Shelley, and Victor.

About First Call Jewel

First Call Jewel is a third generation, family owned electrical, HVAC, and plumbing team serving Southeastern Idaho. Our specialists are licensed, bonded, insured, background checked, and drug tested. We sell, install, and repair Generac standby generators, with 24/7 emergency service and a 100% satisfaction guarantee. From Idaho Falls to rural cabins, we size, install, and maintain code compliant systems with automatic transfer switches, proper clearances, and dependable fuel supply. Celebrating 75 years of service, we deliver precise work, clean uniforms, and trustworthy care.