Whole House Generator Installation: Complete Guide for Missouri Homeowners
Missouri weather can be unpredictable. From summer storms to winter ice, power outages happen. A whole house generator ensures your family stays comfortable and safe.
Why Missouri Homes Need Backup Power
Our Weather Reality
- Summer storms with high winds and lightning
- Winter ice storms that down power lines
- Tornado season bringing extended outages
- Infrastructure strain during extreme temperatures
Average outage in our area lasts 4-8 hours, but major events can mean days without power.
Standby vs Portable Generators
Portable Generators
- Lower upfront cost
- Must be manually started and refueled
- Limited power output (usually 3,000-7,500 watts)
- Requires extension cords to power devices
- Carbon monoxide risk if used improperly
Whole House Standby Generators
- Automatic operation — starts within seconds of outage
- Powers your entire home through the electrical panel
- Runs on natural gas or propane (no refueling)
- Professional installation with transfer switch
- Safer, quieter, and more reliable
Sizing Your Generator
Proper sizing is critical. Too small won't power your needs; too large wastes money.
Key Loads to Consider
- HVAC system — 3,000-6,000 watts
- Refrigerator/freezer — 500-800 watts
- Sump pump — 800-1,500 watts
- Well pump — 1,000-2,000 watts (if applicable)
- Lights and outlets — varies
- Medical equipment — as needed
Typical Sizing
| Home Size | Generator Size | Powers |
|---|---|---|
| Small (1,500 sq ft) | 10-14 kW | Essential circuits |
| Medium (2,500 sq ft) | 16-20 kW | Most circuits |
| Large (3,500+ sq ft) | 22-26 kW | Whole home |
Fuel Options
Natural Gas
- Pros: Unlimited fuel supply, lower fuel cost
- Cons: Requires gas line, not available everywhere
- Best for: Homes already connected to natural gas
Propane (LP)
- Pros: Available anywhere, stores indefinitely
- Cons: Requires tank, fuel deliveries needed
- Best for: Rural homes without natural gas
Installation Requirements
Electrical
- Transfer switch — Safely switches between utility and generator power
- Panel capacity — May need upgrade for larger generators
- Dedicated circuits — Proper wiring to generator location
Site Requirements
- Level concrete pad — Supports generator weight
- Clearances — Distance from windows, doors, property lines
- Fuel connection — Gas line or propane tank
- Permit — Required for electrical and gas work
The Installation Process
- Site evaluation — Determine best location and size
- Permits — Electrical and gas permits pulled
- Pad installation — Concrete base prepared
- Generator delivery — Unit placed on pad
- Electrical connection — Transfer switch and wiring
- Fuel connection — Gas line or propane hookup
- Testing — Full system test and homeowner training
- Inspections — City/county approval
Maintenance Requirements
Standby generators need regular care:
- Weekly self-test — Runs automatically
- Oil changes — Every 100-200 hours of use
- Filter replacement — Air and fuel filters
- Annual inspection — Professional checkup recommended
Never Lose Power Again
Be ready for the next outage before it happens.