Shannon Hills Standby Generator Installation & Maintenance Guide

Estimated Read Time: 11 minutes

When storms or grid events hit, the right whole house generator size is what keeps lights, HVAC, and medical devices running. This guide explains whole house generator sizing in plain language, so you can choose confidently. Tri-State’s factory-trained team installs Generac and KOHLER units in as little as one day and maintains them for peak readiness. Read on for a simple load worksheet, fuel tips, and smart upgrade options that fit your home and budget.

Why Generator Sizing Matters

Choosing the correct size is about more than comfort. It protects appliances, prevents breaker trips, and avoids waste. An undersized unit may stall on start-up loads. An oversized unit costs more to buy and fuel than you need. The goal is reliable power for your priorities at a fair total cost.

Local note for Arkansas homeowners: summer thunderstorms, ice along the I‑30 corridor, and spring tornadoes can cause long outages. The right kW lets you keep HVAC, sump pumps, well pumps, fridges, and Wi‑Fi running without babysitting the panel.

Key outcomes of proper sizing

1. Stable voltage and frequency for sensitive electronics.
2. Smooth HVAC starts during heat or cold snaps.
3. Fuel use that matches your real needs.
4. Room to add a few circuits later without replacing the unit.

How Standby Generators Work in Your Home

A standby generator connects through an automatic transfer switch. When utility power fails, the switch signals the generator to start within seconds. When grid power returns, the switch transfers load back and shuts the generator down automatically. Most residential units run on natural gas or liquid propane and can power only selected circuits or your entire home.

Tri-State installs Generac and KOHLER systems with built-in weekly self-tests that verify readiness. Rust-resistant enclosures protect the unit, and remote monitoring lets you and our team see status at a glance.

Step-by-Step: Calculate Your Home’s Load

You can estimate the right kW in 15 minutes. Precise sizing is finalized during our free on-site evaluation, but this gets you close.

1) List essentials vs. nice-to-haves

1. Essentials:
   • Refrigerator and freezer
   • Gas furnace blower or electric heat strips
   • Central AC or heat pump
   • Sump or well pump if applicable
   • Lights in key rooms, Wi‑Fi, garage door, phone chargers
2. Nice-to-haves:
   • Electric oven, range, dryer
   • Secondary HVAC system
   • Hot tub, pool pump, detached shop

2) Find running and starting watts

Nameplates or manuals show amps or watts. If you have amps, multiply by voltage to get watts. Many motors draw 2 to 5 times their running watts for a few seconds to start.

Typical ranges to help you estimate:

• Refrigerator: 150 to 700 W running, up to 1,800 W starting
• 1 hp well pump: 1,000 W running, 2,000 to 4,000 W starting
• Gas furnace blower: 400 to 800 W running
• Electric water heater: 4,500 W running
• 2.5-ton central AC: 2,500 to 3,500 W running, 6,000 to 9,000 W starting

3) Add the running watts, then add the biggest starting load

1. Total your running watts for the circuits you plan to power at the same time.
2. Identify the single largest starting surge and add it once.
3. Convert to kW by dividing by 1,000.

Example: If your essentials are 5,500 W running and your AC has a 7,000 W start surge, your estimated minimum is about 12.5 kW. Round up to the next standard size for headroom.

4) Consider 120/240 V and fuel type

Most homes need 240 V for HVAC and well pumps. Confirm the generator supports 120/240 V split phase. Note that natural gas has slightly lower energy density than propane, so a small bump in size can help if you will run heavy loads on NG.

Popular Sized Systems and What They Typically Cover

Every home is different, but these brackets reflect what we commonly install in Arkansas. Final sizing is confirmed on site by our factory-trained team.

• 12 to 14 kW: Essentials only in smaller or efficient homes. Fridge, lights, outlets, gas furnace blower, and one small tonnage AC with soft start.
• 18 to 22 kW: Most 1,800 to 3,000 sq ft homes. Essentials plus a typical 3 to 4 ton HVAC, microwave, and a few extra circuits.
• 26 kW: Larger homes or essentials plus electric water heater or well pump with confidence.
• 32 to 48 kW: Large residences with multiple HVAC systems, well and pool equipment, or selective whole-home.
• 60 to 80 kW: Estates and light commercial, whole-home with high electric heat or specialty equipment.

Tri-State carries Generac and KOHLER units from 12 kW up to 80 kW, so we can match the actual demand without forcing you up or down a size.

Fuel Choices: Natural Gas vs. Propane

Both fuels are reliable. Your choice depends on availability, runtime goals, and budget.

• Natural gas:
  • Unlimited runtime from utility supply.
  • Slightly lower BTU per cubic foot than propane.
  • Often lower fuel cost per hour.
• Propane:
  • On-site tank gives independence when gas mains or roads are disrupted.
  • Higher energy content per unit than NG.
  • Requires tank sizing and refills; common residential tanks are 250 to 500 gallons.

Tip: If you want multi-day autonomy at a rural property, we often pair a 22 to 26 kW unit with a 500-gallon propane tank. If you have city gas in Little Rock, NG is the simplest choice.

Managing HVAC Start-Up Loads the Smart Way

AC and heat pump compressors create the largest surge. Two proven strategies keep your generator size in check without sacrificing comfort:

1. Soft-start kits or factory PowerBoost-type features reduce inrush current so smaller generators can start larger HVAC units reliably.
2. Load-shedding modules stage heavy circuits like water heaters and second ACs so only one high-draw load starts at a time.

With the right accessories, a 20 to 26 kW system can often run a 4 to 5 ton HVAC plus your essentials without lights dimming.

Transfer Switches: Whole-Home vs. Managed Circuits

Your transfer switch decides how power is distributed.

• Whole-home switch: Feeds the entire panel. Best for larger kW units or homes that want everything powered. Add load management to tame peaks.
• Essential-circuits switch: Powers a subpanel with selected breakers. Ideal for smaller kW and tight budgets.

Tri-State includes automatic transfer switches sized for your service. They detect the outage, start the generator, and hand control back to utility power once the grid is stable.

Permitting, Placement, and Noise Considerations

Good placement protects your investment and meets code.

• Clearances: Maintain manufacturer clearances from windows, doors, and vents for exhaust safety and service access.
• Foundation: A level concrete pad or composite pad prevents vibration and keeps the unit above standing water.
• Gas and electrical paths: Short, direct runs reduce install cost and pressure drop.
• Sound: Modern units are comparable to a central AC. Placement on the side yard away from bedrooms is common in Conway and Sherwood neighborhoods.

Tri-State handles permits, gas sizing, and inspections. Many turnkey installs are completed in one day, minimizing disruption.

Reliability Features That Protect Your Home

Not all generators are built the same. KOHLER units highlight PowerBoost technology and commercial-grade engines. Generac offers strong whole-home value with proven parts availability. Whichever path you choose, ask about:

• Weekly self-test diagnostics to confirm readiness.
• Remote monitoring so you and our team can spot alerts early.
• Corrosion-resistant enclosures for Arkansas humidity.
• Factory-trained maintenance and genuine parts.

Fact check highlights:

1. Many Tri-State installations finish in one day as a turnkey service.
2. Tri-State provides 24/7 emergency generator service and backs installations with comprehensive product and workmanship warranties.

Budgeting and Total Cost of Ownership

Price depends on size, placement, fuel, and accessories. A smart budget looks beyond the sticker:

• Upfront: Generator, transfer switch, pad, gas and electric work, permits, and labor.
• Options: Load management, soft-start kits, remote monitoring upgrades.
• Operating: Fuel cost per hour varies by load and fuel type.
• Maintenance: Annual preventive service keeps warranty coverage and reliability strong.

Tri-State offers a free online generator estimator and financing options to fit monthly budgets. Promotions often include a discount plus one year of remote monitoring and maintenance.

When to Choose Whole-Home vs. Essentials-Only

Ask these questions:

1. Do you use electric heat or multiple large HVAC systems?
2. Do you rely on medical devices or refrigerated medications?
3. Do you have a well, sump pump, or home office equipment that must stay on?
4. How long are typical outages in your area of Hot Springs, Benton, or Jacksonville?

If you answered yes to two or more, whole-home or a managed whole-home setup is worth the investment. If outages are brief and you have gas heat, an essentials system may be perfect.

Your Free Site Evaluation: What We Check

During your no-cost visit, our generator specialist will:

1. Inspect your electrical service, panel capacity, and grounding.
2. Review HVAC nameplates and large appliance loads.
3. Confirm natural gas meter capacity or size a propane tank.
4. Recommend placement, pad, and clearances.
5. Present options from 12 to 80 kW with a clear scope and price.

You leave with a right-sized plan, a firm quote, and financing options. We schedule installation and, in many cases, complete the turnkey install in a single day.

Maintenance Plan Essentials

A generator is like a vehicle. It needs routine care to be ready when you need it most. Tri-State’s factory-trained technicians perform scheduled maintenance, inspections, and repairs. Most homeowners choose an annual plan that includes:

• Oil and filter changes
• Spark plugs and air filter as needed
• Battery test and replacement if due
• Exercise test and controller diagnostics
• Remote monitoring check and alerts review

Weekly system checks run automatically and confirm the unit will start during the next outage. Our 24/7 emergency service stands by during severe weather to keep your family safe.

Special Offer

Special Offer: Save up to $2,025 on a new standby generator and get free remote monitoring and maintenance for the first year. Offer ends 2026-03-04. Call (877) 301-7693 or visit www.tristatewhywait.com to lock in savings today.

What Homeowners Are Saying

"I could not have expected a more pleasant experience, from the salesman to the installation... They were efficient, kind and respectful and answered all my questions... I needed the peace of mind of having power during an electrical outage." –Tri-State Customer, Generator Installation

"These folks are great! Had two whole house generators installed and both are flawless. Customer support is top notch. Highly recommend." –Tri-State Customer, Generator Installation

"Josh is friendly, professional, quick and considerate! He answered all of my questions, did a great job, and was also friendly with my dog!" –Tri-State Customer, Service Appointment

Frequently Asked Questions

What size whole house generator do most homes need?

Most 1,800 to 3,000 sq ft homes land in the 18 to 22 kW range for essentials plus HVAC. Final size depends on your actual loads and HVAC start-up surge.

Can a 20 kW generator run my central AC?

Often yes, especially with a soft-start kit or load management. The exact answer depends on your AC tonnage and starting watts. We confirm this during the site visit.

Which is better, natural gas or propane?

If you have city gas, natural gas is simple and offers unlimited runtime. For rural autonomy, propane with a 250 to 500 gallon tank is a strong choice.

How long does installation take?

Many turnkey installations are completed in one day after permits and utilities are ready. Our team handles permitting, placement, and inspections.

Do generators test themselves?

Yes. Quality units perform weekly self-tests to verify readiness. With remote monitoring, you and our team can see status and alerts in real time.

Bottom Line

Right-sizing prevents surprises, protects appliances, and saves fuel. For most homes, a clear load list plus smart HVAC start controls point to a dependable 18 to 26 kW solution. If you want help choosing the right whole house generator size in Little Rock, Conway, or Hot Springs, we are ready to assist.

Ready to Get Your Exact Size and Price?

• Call now: (877) 301-7693
• Get your free instant estimate: www.tristatewhywait.com
• Limited-time coupon: Save up to $2,025 and get free remote monitoring and maintenance for 1 year. Expires 2026-03-04.

Schedule your free site evaluation today and be outage-ready with a right-sized Generac or KOHLER system backed by Tri-State’s factory-trained team.

About Tri-State Water, Power, and Air

Family-owned since 1992, Tri-State serves Arkansas homeowners with Generac and KOHLER standby generators, expert turnkey installation, and 24/7 support. We hold a long-standing A+ BBB rating and have served more than 100,000 customers. Factory-trained technicians handle sizing, permitting, installation, and maintenance. We back our work with strong product and workmanship warranties and local know-how you can trust.