Hood, CA Standby Generator Installation & Maintenance Guide

Estimated Read Time: 10 minutes

A power outage is the wrong time to learn your generator is undersized. Choosing the correct whole house generator size ensures your lights, fridge, medical devices, Wi‑Fi, and HVAC stay on without tripping. In this guide, Sacramento’s AAA Electrical Services explains how to match whole house generator size to your real electrical needs, avoid costly oversizing, and pass permits with confidence. You will learn a simple load checklist, why starting watts matter, and how fuel, transfer switches, and placement affect your final choice.

Why Generator Size Matters

An undersized generator will stall or trip when large appliances start. An oversized unit burns more fuel, costs more up front, and can run inefficiently. Correct sizing keeps essential circuits powered and protects sensitive electronics from voltage dips. It also helps you pass inspections and maintain manufacturer warranties.

If your goal is true whole‑home coverage, size the system to support your largest coincident loads plus starting surges. If you only need essentials, you can choose a smaller partial‑load system and direct power where it counts most.

Running Watts vs. Starting Watts

Generators must handle both the steady running load and the brief but higher starting surge of motors and compressors.

Running watts: The continuous power needed to keep equipment operating.
Starting watts: The short spike when a device starts. This can be 2 to 6 times the running watts for motors.

Common examples:

Refrigerator: 700 running, 1,400 to 2,200 starting.
Furnace blower: 600 running, 1,200 starting.
Central AC: 2,500 to 4,000 running, 5,000 to 8,000 starting, depending on tonnage and soft‑start kits.

Your generator must cover the sum of running watts plus the highest likely starting event at any moment.

A Simple Load Calculation You Can Do Today

Make a list of what you want powered during an outage, then add running and starting watts.

List essential circuits.
- Refrigerator and freezer
- Well pump or sump pump
- Gas furnace or air handler
- Wi‑Fi and device charging
- Lighting in key rooms
- Garage door opener
- Medical devices
- Home office gear
Add comfort and safety items.
- Central AC or heat pump
- Electric range or microwave
- Electric water heater
- Security system and cameras
Note the amperage of large appliances. Multiply amps by volts for watts.
Add up running watts. Then identify the largest motor load and add its starting surge.
Apply a buffer of 15 to 25 percent for future circuits or load overlap.

Example: Essentials only might total 5,000 running watts with a 2,000‑watt start surge. A 9 to 11 kW generator could cover this. A typical 2,000 to 2,400 square‑foot home with central AC often needs 14 to 22 kW for whole‑home coverage, depending on AC tonnage and electric vs gas appliances.

Whole‑Home vs. Essential‑Circuits Strategy

You have two smart paths to reliability.

Whole‑home generator with an automatic transfer switch that powers your entire panel. Best for families who want seamless operation with no manual load management.
Partial‑load system with a managed circuits panel. You power the essentials and stage bigger loads so they do not start at once. This lowers the generator size and cost.

AAA Electrical Services installs both. We help you choose based on the appliances you care about most, your panel size, and your budget.

How Your Service Size and Transfer Switch Affect Sizing

Your main service rating and transfer switch design are part of the equation.

Service size: Most Sacramento homes have 100 to 200 amp service. A 200 amp whole‑home transfer switch paired with a load management module can let a 18 to 24 kW unit run a 200 amp home without oversizing.
Transfer switch type: An automatic transfer switch senses utility loss and starts the generator in seconds. Load‑shedding modules pause water heaters or EV chargers during peaks so AC can start cleanly.

Right‑sizing the switch and load management often lets you choose a smaller generator without giving up comfort.

Fuel Type and Altitude Considerations

Fuel choice influences performance and runtime.

Natural gas: Unlimited supply if your utility line remains active. Output ratings are usually lower on natural gas than propane for the same model. Confirm the NG rating when sizing.
Propane: Higher BTU per unit than NG. Requires a properly sized tank. Make sure the tank and regulator can support full‑load flow in cold weather.

At Sacramento’s elevation, derate is minor, but heat can affect performance. On 100 degree days, a unit with a small margin may struggle to start a large AC. Add a reasonable buffer if you plan to run central cooling.

Noise, Placement, and Permitting in Sacramento

Generator location rules and permits matter for both safety and neighbor comfort.

Setbacks and clearance: Keep safe distances from doors, windows, and vents per manufacturer instructions and local code. Typical side clearances are several feet for intake and service access.
Foundation: Place on a level concrete or composite pad to limit vibration and water intrusion.
Venting and exhaust: Aim exhaust away from living spaces and prevailing winds.
Permits and inspections: AAA Electrical Services handles all necessary permits and inspections. We coordinate with the utility for gas meter sizing when needed.

Local note: Many Sacramento homeowners are on SMUD. Others outside city limits are on PG&E. We plan placement and gas capacity with local utility requirements in mind.

Features That Let You Choose a Smaller Size Safely

Modern controls can help you avoid oversizing.

Soft‑start kits on AC units lower starting surge.
Smart load management staggers big loads.
Two‑stage or variable‑speed HVAC draws fewer amps at startup.
LED lighting reduces running load.

These upgrades can shift a home from needing 22 kW to a comfortable 18 kW without losing comfort.

Common Sizing Mistakes to Avoid

Ignoring starting watts for AC and pumps.
Forgetting electric water heaters, ranges, or EV chargers.
Assuming all lights and outlets run at once.
Skipping a buffer for future remodels or a new hot tub.
Choosing a unit based only on square footage. Loads vary widely.

A short home survey by a licensed electrician prevents these missteps and saves thousands over the life of the system.

What Size Do Most Homes Need?

While every home is different, here are general ranges.

Small essentials package: 7 to 11 kW for fridge, lights, outlets, gas furnace blower, Wi‑Fi, and a microwave.
Medium essentials with small AC: 12 to 16 kW.
Typical whole‑home with 3 to 4 ton AC and gas appliances: 18 to 22 kW.
Larger homes or heavy electric loads: 24 to 26 kW and up.

We verify with actual appliance data plates, real‑world starting measurements when needed, and your comfort priorities.

The AAA Electrical Services Sizing and Installation Process

You get a turnkey project from first call to final inspection.

In‑home energy assessment
- We list essential and desired loads.
- We capture running and starting watts, and note service size, panel condition, and AC tonnage.
System design
- We recommend whole‑home or managed circuits.
- We confirm fuel source. We coordinate with natural gas or set up propane with your supplier.
- We select the right automatic transfer switch and load management.
Permitting and scheduling
- We handle permits and inspections. We schedule trenching, pad, gas work, and electrical tie‑in.
Professional installation
- Licensed electricians complete placement, wiring, and integration to code.
- We test automatic operation so it turns on when the power goes out.
Homeowner orientation
- You learn safe operation, weekly exercise features, and maintenance plan options.

Hard facts you can trust:

Generators should be inspected at least once a year or after extended use. Preventative maintenance helps avoid breakdowns during outages.
Our VIP+ members receive a 20‑point maintenance service twice per year and doubled repair warranties on qualifying work.
AAA Electrical Services is BBB Accredited A+ Rated and fully licensed and insured, CSLB #635556.

Maintenance Planning Protects Your Investment

Reliable backup power is a maintenance habit, not a one‑time event. AAA Electrical Services offers same‑day and emergency repair options and supports all major brands. We also repair generators we did not install when parts and access allow.

For worry‑free ownership, consider our VIP+ plan.

20‑point maintenance service twice per year
Priority scheduling and 24/7 emergency coverage
Discounted diagnostic fee and up to 10 percent off repairs
Fixed Forever guarantee that doubles the manufacturer warranty for VIP+ members

Regular service covers oil and filter changes, air filtration, spark plugs, battery health, valve adjustments per schedule, exercise cycle verification, and a full transfer test under load.

Budgeting and Total Cost of Ownership

The right size is the best value, not the biggest number.

Equipment: Generator size, enclosure type, and transfer switch drive price.
Site work: Pad, gas line, trenching, and permit fees vary by home.
Electrical: Panel upgrades, sub‑panels, or load management modules can optimize size.
Fuel: Natural gas has ongoing utility costs. Propane requires tank rental or purchase and refills.

A properly sized generator avoids overspending up front and reduces fuel use and noise during an outage.

Repair, Replace, or Upsize

If you already own a generator that struggles to start AC or trips often, you have options.

Add soft‑start to the AC to lower start amps.
Add load management for water heater and EV charger.
Service the generator to restore output to spec.
If your life has added loads, such as a home office or medical device, we can upsize and reuse existing gas and pad when possible to control costs.

Local Insight: Planning for Sacramento Outages

Wildfire‑related shutoffs and summer heat events can strain the grid. SMUD customers often ride through, but pockets still see outages. Homes on the edges of the metro that rely on PG&E may face longer restoration times. A generator sized for your AC plus essentials keeps your home livable when temperatures spike above 100 degrees.

Your Next Step

Use the quick load list above, then schedule a sizing visit. We will confirm your numbers, recommend the right whole house generator size, and handle the permits, fuel, and installation end to end. That is how you get seamless, automatic power when it matters most.

What Homeowners Are Saying

"I had AAA install a generator transfer switch on our house. They came out the same day I called them. They had to order a part for the project, they kept me informed about when part would arrive and they also kept me informed about when the technicians would be at my house to complete the job. Would definitely recommend AAA Electric and will be having them back for future projects"
–Cynthia W., Sacramento

Frequently Asked Questions

How big should a whole house generator be for a 2,000 square‑foot home?

Square footage is a poor predictor. A 2,000 to 2,400 square‑foot home with gas appliances and a 3 to 4 ton AC often needs 18 to 22 kW for whole‑home coverage. Confirm with a load calculation.

Can I run central AC on a smaller generator?

Yes, with soft‑start on the AC and smart load management. Many homes run a 3 to 4 ton AC on 18 to 20 kW units when other large loads are shed during startup.

Natural gas or propane for standby generators?

Natural gas offers unlimited runtime if utility gas stays on. Propane delivers higher output per BTU with a properly sized tank. Check ratings because NG output is usually lower than propane for the same model.

Do I need a permit for a standby generator in Sacramento?

Yes. Expect electrical and possibly gas permits. AAA Electrical Services handles permits and inspections and coordinates with the utility when needed.

How often should my generator be serviced?

At least once a year or after extended use. Our VIP+ members receive a 20‑point maintenance service twice per year, plus priority scheduling and warranty advantages.

In Summary

Choosing the right whole house generator size starts with a real load list, not square footage. Factor in starting watts, fuel, transfer switches, and Sacramento placement rules. AAA Electrical Services handles sizing, permits, fuel coordination, installation, and maintenance so your system turns on automatically when the power goes out. For reliable standby power in Sacramento and nearby cities, we are ready to help today.

Ready for a Right‑Sized Quote?

Call AAA Electrical Services at (916) 229-6084
Schedule online at http://aaaes.com/
Ask about our VIP+ membership for twice‑yearly 20‑point maintenance, priority scheduling, and doubled repair warranties

Serving Sacramento, Elk Grove, Roseville, Citrus Heights, Folsom, Rancho Cordova, Davis, Carmichael, Rocklin, and Woodland.

About AAA Electrical Services

For over 30 years, AAA Electrical Services has protected Sacramento homes with safe, code‑compliant electrical work and clear upfront pricing. We are BBB Accredited A+ Rated and fully licensed and insured, CSLB #635556. Our technicians are background‑checked, drug‑tested, and continuously trained. We offer same‑day service, 24/7 emergency support, and a VIP+ plan with priority scheduling and doubled repair warranties. When you want standby power done right, we handle sizing, permits, fuel coordination, installation, and maintenance end to end.