St. Louis’s Premier Provider of Industrial and Commercial Power Generation Solutions

In St. Louis, MO, EVAPAR has earned a reputation as a leading provider of power generation solutions for both industrial and commercial applications. With a partnership with Generac Power Systems, we deliver top-tier generators and accessories tailored to meet the needs of the St. Louis community. Whether you’re ensuring your home stays powered during an outage or your business operations run smoothly, EVAPAR has the expertise to keep you powered.
For decades, EVAPAR has been at the forefront of the power generation industry in St. Louis, MO. Our strong partnership with Generac Power Systems enables us to provide a comprehensive range of power generation equipment for residential, commercial, and industrial applications. From small residential generators to large industrial power systems, our products are designed to deliver reliable performance.
Generac is known for its innovative power generation solutions, offering a wide range of products including diesel and gaseous-fueled generators, transfer switches, and engine-powered solutions. For businesses in St. Louis, Generac’s advanced systems, such as the Bi-Fuel system and Gemini Twin Pack, provide scalable and flexible power solutions that ensure continuous operation.
At EVAPAR, we are committed to delivering complete power generation solutions. Our team offers pre-design consultations to help you determine the best system for your specific needs. In addition, we provide a full range of accessories, including enclosure packages, fuel tanks, transfer switches, battery chargers, alarm panels, controllers, and connection cabinets. Our goal is to ensure that your power generation system is fully optimized and tailored to your unique requirements.
With a focus on quality and customer satisfaction, EVAPAR has become St. Louis’s trusted partner for power generation solutions. Whether you need a reliable backup power source for your home or a powerful system for your business, EVAPAR is here to support your power needs.
Reach out to EVAPAR in St. Louis today to explore our power generation solutions and ensure your home or business is never without power.
EVAPAR St. Louis, MO Sales & Service Area

Missouri Area
Cities Served:
- Advance
- Alexandria
- Altenburg
- Alton
- Anabel
- Annada
- Annapolis
- Anniston
- Arbela
- Arbyrd
- Arcadia
- Argyle
- Arnold
- Ashburn
- Ashland
- Atlanta
- Augusta
- Auxvasse
- Ava
- Bakersfield
- Ballwin
- Baring
- Barnhart
- Beaufort
- Belgrade
- Bell City
- Belle
- Belleview
- Bellflower
- Benton
- Benton City
- Berger
- Bernie
- Bertrand
- Bethel
- Beulah
- Bevier
- Birch Tree
- Bismark
- Bixby
- Black
- Blackwell
- Bland
- Bloomfield
- Bloomsdale
- Bonne Terre
- Bonnots Mill
- Boss
- Bourbon
- Bowling Green
- Bragg City
- Brandsville
- Brashear
- Brazeau
- Briar
- Bridgeton
- Brinktown
- Brixey
- Broseley
- Brownwood
- Brumlye
- Bucyrus
- Bunker
- Burdfordville
- Cabool
- Cadet
- Cairo
- Caledonia
- California
- Callao
- Camdenton
- Campbell
- Canalou
- Canton
- Cape Giradeau
- Cardwell
- Caruthersville
- Catawissa
- Catron
- Caulfield
- Cedar Hill
- Center
- Centertown
- Centerville
- Centralia
- Chaffee
- Chamois
- Charleston
- Cherryville
- Chesterfield
- Clarence
- Clark
- Clarksburg
- Clarksville
- Clarkton
- Clifton Hill
- Climax Springs
- Clubb
- Coatsville
- Columbia
- Conway
- Cook Station
- Cooter
- Couch
- Crocker
- Crystal City
- Cuba
- Curryville
- Daisy
- Davisville
- De Soto
- Defiance
- Des Arc
- Devils Elbow
- Dexter
- Dittmer
- Dixon
- Doe Run
- Doniphan
- Dora
- Downing
- Drury
- Dudley
- Duke
- Durham
- Earth City
- East Prairie
- Edgar Springs
- Edina
- Eldon
- Eldridge
- Elk Creek
- Ellington
- Ellsinore
- Elmer
- Elsberry
- Emden
- Eminence
- Eolia
- Essex
- Ethel
- Eugene
- Eunice
- Eureka
- Ewing
- Excello
- Fairdealing
- Falcon
- Farber
- Farmington
- Farrar
- Fenton
- Festus
- Fisk
- Fletcher
- Forissant
- Foley
- Foristell
- Fort Leonard
- Frankfort
- Fredericktown
- Freeburg
- Fremont
- French Village
- Friedheim
- Frohna
- Fulton
- Gainesville
- Gatewood
- Gerald
- Gibbs
- Gibson
- Gideon
- Gipsy
- Glenwood
- Gobler
- Graff
- Grandin
- Granger
- Grassy
- Gray Summit
- Greentop
- Greenville
- Grovespring
- Grubville
- Hallsville
- Hannibal
- Hardenville
- Harrisburg
- Hartsburg
- Hartshorn
- Hartville
- Harviell
- Hawk Point
- Hayti
- Hazelwood
- Henley
- Herculaneum
- Hermann
- Higbee
- High Hill
- High Point
- High Ridge
- Hillsboro
- Hocomb
- Holland
- Holliday
- Holts
- Hornersville
- House Springs
- Houston
- Huggins
- Hunnewell
- Huntsville
- Hurdland
- Iberia
- Imperial
- Irondale
- Ironton
- Isabella
- Jackson
- Jacksonville
- Jadwin
- Jamestown
- Jefferson City
- Jerome
- Jonesburg
- Kahoka
- Kaiser
- Kakaskia
- Kennett
- Kingdom City
- Kirksville
- Knox City
- Koeltztown
- Koshkonong
- La Belle
- La Grange
- La Plata
- Labadie
- Laddonia
- Lake Ozark
- Lake St. Louis
- Lancaster
- Laquey
- Latham
- Leadwood
- Leasburg
- Lebanon
- Lenox
- Lentner
- Leonard
- Leopold
- Leslie
- Lesterville
- Lewistown
- licking
- Liguori
- Lilbourn
- Linn
- Linn Creek
- Lodi
- Lohman
- Lonedell
- Loose Creek
- Louisiana
- Lowndes
- Luebbering
- Luray
- Lynchburg
- Macks Creek
- Macomb
- Macon
- Madison
- Malden
- Mansfield
- Marble Hill
- Marquand
- Marston
- Marthasville
- Martinsburg
- Maryland Heights
- Matthews
- Maywood
- McGee
- Memphis
- Meta
- Mexico
- Middletown
- Mill Spring
- Millersville
- Mineral Point
- Moberly
- Mokane
- Monroe City
- Montgomery
- Monticello
- Montreal
- Moody
- Morrison
- Moscow Mills
- Mountain Grove
- Mountain View
- Myrtle
- Naylor
- Neelyville
- New Bloomfield
- New Cambria
- New Florence
- New Haven
- New London
- New Madrid
- Newark
- Newburg
- Noble
- Norwood
- Novelty
- Novinger
- O'Fallon
- Oak Ridge
- Old Appleton
- Old Monroe
- Olean
- Oran
- Osage Beach
- Owensville
- Oxly
- Pacific
- Palmyra
- Paris
- Park Hills
- Parma
- Patterson
- Patton
- Perry
- Perryville
- Pevely
- Philadelphia
- Phillipsburg
- Piedmont
- Pilot Knob
- Plato
- Pomona
- Pontiac
- Poplar Bluff
- Portage Des Sioux
- Portageville
- Portland
- Potosi
- Pottersville
- Puxico
- Queen City
- Qulin
- Raymondville
- Redford
- Revere
- Rhineland
- Richland
- Richwoods
- Risco
- Roach
- Robertsville
- Roby
- Rocheport
- Rolla
- Rosebud
- Rush Hill
- Russelville
- Rutledge
- St. Charles
- Saint Clair
- St. Peters
- Salem
- Santa Fe
- Scott City
- Sedgewickville
- Senath
- Shelbina
- Shelbyville
- Sikeston
- Silex
- Silva
- South Gorin
- Squires
- St. Albans
- St. Ann
- St. Elizabeth
- St. James
- St. Patrick
- St. Robert
- St. Thomas
- Steedman
- Steele
- Steelville
- Stoutland
- Stoutsville
- Sturdivant
- Sturgeon
- Success
- Sullivan
- Summersville
- Sunrise Beach
- Tallapoosa
- Taylor
- Tebbetts
- Tecumseh
- Thayer
- Theodosia
- Thompson
- Thornfield
- Tipton
- Troy
- Truesdale
- Turxton
- Tuscumbia
- Udall
- Ulman
- Union
- Uniontown
- Valles Mines
- Valley Park
- Van Buren
- Vandalia
- Vanduser
- Vanzant
- Viburnum
- Vichy
- Vienna
- Vulcan
- Wappapello
- Wardell
- Warrenton
- Washington
- Wasola
- Wayland
- Waynesville
- Wellsville
- Wentzville
- Wesco
- West Alton
- West Plains
- Westphalia
- Whitewater
- Wildwood
- Wiliamsburg
- Williamstown
- Williamsville
- Willow Springs
- Winfield
- Winona
- Wright City
- Wyaconda
- Wyatt
- Yukon
- Zalma
- Zanoni
Counties Served:
- Adair
- Audrain
- Bollinger
- Boone
- Butler
- Callaway
- Camden
- Carter
- Charles
- St. Louis City
- Clark
- Cole
- Crawford
- Dent
- Douglas
- Dunklin
- Francois
- Franklin
- Gasconade
- Genevieve
- Girardeau
- Howell
- Iron
- Jefferson
- Knox
- Laclede
- Lewis
- Lincoln
- St. Louis
- Macon
- Madison
- Madrid
- Maries
- Marion
- Miller
- Mississippi
- Moniteau
- Monroe
- Montgomery
- Oregon
- Osage
- Ozark
- Pemiscot
- Perry
- Phelps
- Pike
- Pulaski
- Ralls
- Randolph
- Reynolds
- Ripley
- Schuyler
- Scotland
- Scott
- Shannon
- Shelby
- Stoddard
- Texas
- Warren
- Washington
- Wayne
- Wright
Illinois Area
Cities Served:
- Abha
- Abingdon
- Adair
- Addieville
- Albers
- Alexander
- Alhambra
- Alto Pass
- Alton
- Altona
- Anchor
- Anna
- Arenzville
- Argenta
- Armington
- Arrowsmith
- Ashland
- Ashley
- Assumption
- Astoria
- Athens
- Atlanta
- Auburn
- Augusta
- Aviston
- Avon
- Baldwin
- Bardolph
- Barry
- Bartelso
- Basco
- Batchtown
- Bath
- Balyis
- Beardstown
- Beason
- Beckemeyer
- Belleville
- Bellflower
- Bement
- Benld
- Benson
- Berwick
- Bethalto
- Bethany
- Biggsville
- Bingham
- Blandinsville
- Bloomington
- Blue Mound
- Bluffs
- Boody
- Bowen
- Breese
- Brighton
- Brimfield
- Browning
- Brownstown
- Brussels
- Bryant
- Buffalo
- Bulpitt
- Bunker Hill
- Bushnell
- Butler
- Cairo
- Camden
- Cameron
- Camp Point
- Canton
- Cantrall
- Carlinville
- Carlock
- Carlyle
- Carman
- Carrolton
- Carthage
- Caseyville
- Cerro Gordo
- Chambersburg
- Chandlerville
- Chapin
- Catham
- Chenoa
- Chester
- Chesterfield
- Chestnut
- Chillicothe
- Cisco
- Clayton
- Clinton
- Coatsburg
- Cobden
- Coffeen
- Colchester
- Colfax
- Collinsville
- Columbia
- Concord
- Congerville
- Cooksville
- Cornland
- Cottage Hills
- Coulterville
- Cowden
- Creve Coeur
- Cropsey]
- Cuba
- Dahinda
- Dallas City
- Dalton City
- Danvers
- Dawson
- De Land
- Decatur
- Deer Creek
- Delavan
- DeWitt
- Divernon
- Dongola
- Donnellson
- Dorsey
- Dow
- Downs
- Du Bois
- Dunfermline
- Dunlap
- Dupo
- East Alton
- East Carondelet
- East Galesburg
- East Peoria
- East St. Louis
- Easton
- Edelstein
- Edinburg
- Edwards
- Edwardsville
- El Paso
- Eldred
- Elkhart
- Ellis Grove
- Ellisville
- Ellsworth
- Elmwood
- Elsah
- Elvaston
- Emden
- Eureka
- Evansville
- Fairview
- Fairview Heights
- Farina
- Farmer
- Farmersville
- Framington
- Fidelity
- Fieldon
- Filmore
- Findlay
- Forest City
- Forsyth
- Fowler
- Franklin
- Frederick
- Freeburg
- Fults
- Galesburg
- Gays
- Gerlaw
- Germantown
- Gillespie
- Gilson
- Girard
- Gladstone
- Glasford
- Glen Carbon
- Glenarm
- Godfrey
- Golden
- Golden Eagle
- Good Hope
- Goodfield
- Grafton
- Granite City
- Green Valley
- Greenfield
- Greenview
- Greenville
- Gridley
- Griggsville
- Groveland
- Hagarstown
- Hamburg
- Hamel
- Hamilton
- Hammond
- Hanna City
- Hardin
- Harristown
- Hartford
- Hartsburg
- Harvel
- Havana
- Hecker
- Henderson
- Herrick
- Hettick
- Heyworth
- Highland
- Hilsboro
- Hillview
- Hoffman
- Hopedale
- Hoyleton
- Hudson Township
- Hull
- Huntsville
- Illiopolis
- Industry
- Ipava
- Irving
- Irvington
- Jacksonville
- Jerseyville
- Jonesboro
- Kampsville
- Kane
- Kenney
- Keyesport
- Kilbourne
- Kincaid
- Kinderhook
- Kingston Mines
- Kirkwood
- Knoxville
- La Harpe
- La Place
- La Prairie
- Lakewood
- Lane
- Latham
- Laura
- Le Roy
- Lebanon
- Lenzburg
- Lewistown
- Lexington
- Liberty
- Lincoln
- Litchfield
- Little York
- Littleton
- Liverpool
- Livingston
- Loami
- Lomax
- London Mills
- Loraine
- Lovington
- Lowpoint
- Mackinaw
- Macomb
- Macon
- Madison
- Manito
- Mansfield
- Mapleton
- Maquon
- Marietta
- Marine
- Marissa
- Maroa
- Maryville
- Mascoutah
- Mason City
- McClure
- McLean
- Mechanicsburg
- Media
- Medora
- Mendon
- Meredosia
- Metamora
- Micheal
- Middletown
- Miller City
- Millstadt
- Milmine
- Milton
- Minier
- Minonk
- Mode
- Modesto
- Modoc
- Monmouth
- Monticello
- Moro
- Morrionsville
- Morton
- Mossville
- Mount Auburn
- Mount Olive
- Mount Pulaski
- Mount Sterling
- Mount Zion
- Moweaqua
- Mozier
- Mulberry Grove
- Murrayville
- Nashville
- Nauvoo
- Nebo
- New Athens
- New Baden
- New Berlin
- New Canton
- New Douglas
- New Holland
- New Salem
- Niantic
- Nilwood
- Niota
- Nokomis
- Normal Township
- Norris
- O'Fallon
- Oakdale
- Oakford
- Oconee
- Ohlman
- Okawville
- Olive Branch
- Oneida
- Oquawka
- Orena
- Palmer
- Plamyra
- Paloma
- Pana
- Panama
- Pawnee
- Payson
- Pearl
- Pekin
- Peoria
- Peoria Heights
- Percy
- Perry
- Petersburg
- Piasa
- Pittsfield
- Plainville
- Pleasant Hill
- Pleasant Plains
- Plymouth
- Pocahontas
- Praire City
- Prairie du Rocher
- Princeville
- Quincy
- Ramsey
- Raritan
- Raymound
- Red Bud
- Richview
- Rio
- Riverton
- Roanoke
- Rochester
- Rockbridge
- Rockport
- Rockwood
- Roodhouse
- Rosamond
- Roseville
- Roxana
- Rushville
- St. Elmo
- San Jose
- Sawyerville
- Saybrook
- Sciota
- Secor
- Shelbyville
- Sherman
- Shipman
- Shirley
- Shobonier
- Sigel
- Smithboro
- Smithfield
- Smithshire
- Smithon
- Sorento
- South Pekin
- South Roxana
- Sparta
- Springfield Township
- St. Augustine
- St. David
- St. Jacob
- St. Libory
- St. Peter
- Stanford
- Staunton
- Steeleville
- Stewardson
- Stonington
- Strasburg
- Stronghurst
- Sullivan
- Summerfield
- Sutter
- Table Grove
- Tallula
- Tamms
- Tanomah
- Taylor Springs
- Taylorville
- Tennessee
- Thayer
- Thebes
- Tilden
- Topeka
- Tovey
- Towanda
- Tower Hill
- Tremont
- Tenton
- Trivoli
- Troy
- Ursa
- Valmeyer
- Vandalia
- Venice
- Vermont
- Versailles
- Victoria
- Virden
- Virgina
- Waggoner
- Walsh
- Walshville
- Wapella
- Warrensburg
- Warsaw
- Washington
- Wataga
- Waterloo
- Waverly
- Waynesville
- Weldon
- Wellington
- West Point
- White Hall
- White Heath
- Williamsfield
- Williamsville
- Wilsonville
- Winchester
- Windsor
- Witt
- Wolf Lake
- Wood River
- Woodson
- Worden
- Wrights
- Yates City
Counties Served:
- Adams
- Alexander
- Bond
- Brown
- Calhoun
- Cass
- Christian
- Clair
- Clinton
- Fayette
- Fulton
- Greene
- Hancock
- Henderson
- Jersey
- Knox
- Logan
- Macon
- Macoupin
- Madison
- Mason
- Mcdonough
- Mclean
- Menard
- Monroe
- Montgomery
- Morgan
- Moultrie
- Peoria
- Piatt
- Pike
- Randolph
- Sangamon
- Schuyler
- Scott
- Shelby
- Tazewell
- Union
- Warren
- Washington
- Witt
- Woodford
EVAPAR'S Power Generation PRODUCT LINES FOR St. Louis, MO
Reliable Backup Power Generation for Commercial, Industrial or Residential applicaitons.
Natural gas is becoming the preferred solution in many standby applications.
• Propane provides a good fuel storage life span
• Essentially unlimited runtimes with the highly reliable fuel source of natural gas
• Easier permitting, lower emissions
• Fuel redundancy to show with diesel fuel units
• Lower maintenance requirements
• Facilities don’t have to worry on refueling with natural gas
• EPA Certified in emergency and non-emergency situations
Demand Response
Demand Response is a great way for organizations to unlock value and be flexible in how they use their gen-set. Utility programs already exist in many markets today to take advantage of.
Participation in Demand Response programs can offset generator capital and operational expenses while providing the owner some return on what would otherwise be an insurance policy.
Generac’s natural gas generators can be used in Demand Response applications so you can easily improve your bottom line and help pay back your initial investment.
The traditional choice for standby power.
• Code compliant
• Great option for when on-site fuel storage is required
• Efficient choice for large KW application
• Full product line with single and parallel units. Parallel units offer reliability for critical projects and capacity for larger projects.
The only true bi-fuel solution. Operates on mix of Natural Gas and Diesel Fuels
• Combine the power of diesel with the reliability and clean operation of natural gas
• Runtime is four times longer on a given amount of diesel fuel
• Meets the on-site fuel requirements of National Electric Code (NEC) 700 and National Fire Protection Agency (NFPA) 110 with a diesel storage tank
• Delivers the benefits of longer runtimes as the generator transitions to natural gas under load
• Full factory solution, no field upgrade or modifications needed
• EPA compliant from Generac Industrial Power
The only true bi-fuel solution. Operates on mix of Natural Gas and Diesel Fuels
• Combine the power of diesel with the reliability and clean operation of natural gas
• Runtime is four times longer on a given amount of diesel fuel
• Meets the on-site fuel requirements of National Electric Code (NEC) 700 and National Fire Protection Agency (NFPA) 110 with a diesel storage tank
• Delivers the benefits of longer runtimes as the generator transitions to natural gas under load
• Full factory solution, no field upgrade or modifications needed
• EPA compliant from Generac Industrial Power
EVAPAR offers a full line of Automatic Transfer Switches including: By-Pass Isolation, Open and Closed Transition, and Service Entrance Rated. We stock both Industrial and Residential models, please check with us on current availability if you have a quick need. Our expert sales team can work with you to identify the best ATS for your application. We work with and provide ATS’s from several major manufacturers: Generac Power Systems, ASCO, Russelectric, Thomson Power Systems, Eaton/Cutler-Hammer, Lake Shore Electric, Zenith (ABB & GE), and others. We also offer Manual Transfer Switches.
We work with several manufacturers of Generator Connection Cabinets (Docking Stations) to offer the right solution to our customers. Many options and configurations are currently available, contact us to work with you on the correct make and model for your need. Whether simply an easy connection point for a Roll-Up Generator or Load Bank or a more involved dual-purpose cabinet with greater functionality, we can offer these multiple options.
Losing power for even a few hours can mean thousands of dollars in lost revenue to your business. Security systems go down, refrigerated goods spoil, and customers are turned away. Generac revolutionized the light commercial generator market with the first standby generators powerful enough to back your entire business without the cost of expensive configured systems. Keep your business open with a competitive advantage. Also ideal for large residential applications.
• Capable of providing full power protection for large homes and light commercial applications from gas stations and convenience stores to restaurants, schools, assisted living centers, and municipal buildings.
• Single and three phase output in a variety of voltages.
• Quiet-Test mode for a weekly self-test that runs quieter than the competition.
• Optional aluminum, all-weather enclosure provides substantial protection from the elements. Aluminum’s corrosion resistance prolongs the life of your power generator. Recommended for salt-air, coastal communities. Sturdy galvanized steel enclosures are coated with Rhinocoat™ finish for added weather protection.
• Units available in: Natural Gas, Propane, and Diesel
• Remote monitoring options available.
Delivering prime power solutions in a wide range of power nodes, Generac Mobile generators are designed and engineered to support a variety of projects, regardless of the weather conditions. Our generators are configured to meet your needs, including choice of containment, cold weather packages and trailer options. For ultimate flexibility, most of our mobile generators come parallel-ready, enabling a scalable approach to power – parallel up to 32 units. Generac Mobile generators are manufactured to deliver the reliable power you need, when and where you need it.
By harnessing wellhead gas as fuel, our gaseous generators are able to minimize emissions issues on oil and gas worksites and provide the most cost effective power available. Generac Mobile gaseous generators feature an innovative design that allows users to switch between natural gas (NG), liquid propane (LP) and wellhead gas. Generac is the global leader in gaseous power generation. Count on Generac Mobile for power solutions for projects big and small.
From everyday necessities like heating, cooling, refrigeration and lights, to daily essentials like cooking, laundry or kids’ bath times. Power outages are occurring more frequently than ever and lasting longer with devastating effects. Stand up to unpredictable weather and unforeseen outages with the most trusted name in residential standby power. If the power ever goes out, your Generac standby home generator goes on—automatically—protecting you and your home 24/7.
• Generac is #1 in the home generator market.
• Full line of air-cooled products.
• Larger units available in the Commercial line.
• Sleek enclosure design to maximize esthetics.
HONDA GENERATORS AND PUMPS
POWER WHERE YOU WANT IT, WHEN YOU WANT IT
Legendary Honda reliability makes Honda generators the ideal backup power source for homes and businesses alike. Equipped with Honda GX, iGX, or GC-Series four-stroke engines, our generators have earned a hard-won reputation for smooth, quiet operation, and outstanding fuel efficiency. It’s no wonder Honda Generators are prized in the construction and rental trades, and designated as official suppliers to many professional sporting events!
Not sure what generator you need?
WHEN IT HAS TO FLOW, GO WITH HONDA PUMPS
Gas-powered Honda pumps are driven by Honda GX Series commercial-grade engines. Legendary for quick starts and rock-solid reliability, these quiet, four-stroke engines deliver impressive performance and fuel efficiency. Teamed with Honda’s innovative designs, exclusive features and rugged durability, they create pumps that keep every job flowing smoothly.
EVAPAR Generator Projects
All of our branches are strategically located to meet all our customer’s needs. With five locations, situated throughout the Midwest, we are an experienced and trusted partner on projects of any size and magnitude. We continue our evolution as the premier provider of power generation equipment. View a few examples of the power systems we’ve provided to our customers in Indiana, Illinois, Kentucky, and Missouri.