A dark East Texas street during a storm; one brick home glows with its standby generator running
We answer 24/7 · 365 days a year

Longview, TX · Since 2021 · Generators installed, repaired & maintained

When the neighborhood goes dark, yours won't.

GenTechAPS installs, repairs, and maintains home and commercial standby generators across East Texas. Stocked trucks, first-trip fixes, and a phone that gets answered at 2am.

Call 903-353-2848 What size do I need?
Authorized dealer & installer KohlerGeneracBriggs & StrattonAurora

What happens when the grid fails

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The grid drops. The whole street goes dark, including your house.

2 s

The automatic transfer switch senses the outage. The generator cranks and comes up to speed.

10 s

Power transfers. Your house runs like nothing happened, and switches back on its own when the grid returns.

Typical for an automatic home standby generator with a transfer switch, the kind GenTechAPS installs. Scroll to watch it happen.

An automatic transfer switch opened for service Automatic transfer switch

What we do

Install it. Fix it. Keep it ready.

Three things, done right, for homes and businesses across East Texas. Every one of them starts with a phone call that gets picked up.

01 — Repair

Generator Repair

Blackouts don't keep business hours, so neither do we. 24/7, 365, any brand.

Learn more 02 — Installation

Generator Installation

End power outages for good. Turnkey installs of Kohler, Generac, Briggs & Stratton, and Aurora.

Learn more 03 — Maintenance

Rest Easy Plans

Preventative maintenance that helps protect your equipment and keeps your unit ready.

See the plans
Three GenTechAPS service vans and an equipment trailer lined up and ready

Why people call GenTechAPS

Stocked trucks. First-trip fixes. A phone that gets answered.

A 20-minute repair turns into a 4-hour job when the technician shows up without the part. Our trucks carry batteries, parts, repair kits, and tools for the most common generator problems, so most repairs are finished on the first visit.

  • Authorized Kohler, Generac, Briggs & Stratton, and Aurora dealer
  • Certified for warranty work on Kohler, Generac, and Briggs & Stratton
  • Propane, natural gas, and diesel units, every major brand
  • Honest pricing. We won't sell you a service you don't need.
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Repairs done first trip
24/7
365 days a year
4
Authorized brands

Recent work

Real installs, real East Texas.

Drag to browse · tap to enlarge
Tan Kohler home standby generator on a white pad beside a red-brick house with black shutters, a gas line connected at its side and a gray Kohler box next to the electric meter.Kohler home standby, brick home Kohler generator on a concrete pad beside a driveway, with a brick garage at left, a white trailer at right and the GenTech van with its office number behind.Kohler generator with the GenTechAPS van on site Charcoal-gray Briggs & Stratton Fortress generator on a concrete pad beside a tan-and-brown brick house, with a pipe connection at its right side and water visible through the trees at left.Briggs & Stratton standby, brick home Tan Kohler home standby generator inside a low brick-and-stone enclosure beside a building with gray-green siding and a stone base, near the electric meter, a gray Kohler box and gas piping.Kohler standby in a stone-walled enclosure Tan Kohler generator on a long concrete pad under shade trees beside a log-sided home with a wooden deck, two air-conditioning units and gray electrical boxes, one labeled Kohler.Kohler standby generator at a log home Tan Kohler home standby generator on a pad beside a red-brick house, with a gas meter and gas line on the wall at left and stacked firewood at the edge of a covered patio at right.Kohler standby beside the woodpile Tall gray Kohler transfer switch cabinet mounted on a red-brick wall beside the electric meter, under the roof eaves next to an open garage.Kohler transfer switch beside the meter Gray generator in a gravel bed with a side panel removed to show the engine, a drill on its pad and a tool bag in front, a red GenTech pickup on the gravel drive and a metal gate behind.Work under way, GenTechAPS truck on site Large gray Kohler generator in a metal enclosure with two hinged access doors and vent grilles, on a concrete pad beside a tan-brick building and a chain-link fence.Kohler generator beside a brick building Kohler generator on a concrete pad beside a cream metal building with large garage doors, near gray Kohler electrical boxes, an electric meter and three air-conditioning units.Kohler standby generator, metal building White Briggs & Stratton PowerProtect generator on a pad in red soil beside a dark metal building, with conduit to an electric meter and a gray Briggs & Stratton box, and a gas regulator at right.Briggs & Stratton PowerProtect, metal building White Briggs & Stratton PowerProtect generator on a pad beside a dark metal building, with a black gas line running along the wall from a gas meter and regulator, and yellow marker flags in red soil.Briggs & Stratton with gas line and meter Tall white Blue Star Power Systems generator on a black base on a concrete pad beside a brick building, with a man in a gray vest leaning over the base and black cables on the grass.Blue Star generator beside a brick building Mike Glisan in a blue shirt and cap at a laptop on top of an open generator with its engine exposed, in a gravel bed with meters, a gray cabinet and a green utility enclosure nearby.Mike working at an open generator Open gray transfer switch cabinet on a red-brick wall showing the switch mechanism, a service disconnect breaker and heavy wiring, next to an electric meter and a wall lamp.Transfer switch with the cover off Cream PowerStation Emergency Backup Power System generator beside a brick wall and metal fence.PowerStation emergency backup unit GenStart 500 controller by Flight Systems Inc. with a small display, arrow keys, Auto, Off and Run buttons and status lights, set in a weathered cream panel beside a circuit breaker.GenStart 500 controller Coleman PowerStation CP 500 control panel with a display labeled for voltage, amps, oil pressure, fuel level, coolant temperature and battery voltage, and Run, Off and Auto buttons.Coleman PowerStation control panel Two white Ram vans beside a GenTech service truck with open rear doors showing equipment, parked on grass beneath a lattice tower.GenTechAPS service vehicles White Ram ProMaster van wrapped with the GenTech Alternative Power Solutions logo, office number (903) 353-2848, generator pictures and the slogan Keep your power on, even when the power's out.GenTechAPS van lettering Mike Glisan in a blue GenTech polo and cap leaning on a red pickup lettered GenTech Alternative Power Solutions, 903-353-2848.Mike Glisan and the red GenTechAPS truck
All 21 photos

Rest easy maintenance plans

Your generator has one job. Make sure it does it.

Most owners find out the generator isn't working the moment the power goes out. A plan helps keep the unit ready and provides a record of its maintenance.

Most popular
The Standard Plan
$400starting at

An affordable rate with an exceptional return in the work performed and the care given.

  • Oil, oil filter, air filter, and spark plugs replaced with OEM parts
  • Controller fault log reviewed, maintenance reminder cleared
  • Battery tested for voltage and cold cranking amps
  • Visual and physical inspection, interior clean-up, test start, left in AUTO
Full plan details
Added preventive care
The Premium Plan
$600starting at

For owners who want the worry taken out of maintaining their home generator.

  • Everything in Standard, plus battery load test and terminal cleaning
  • A new battery every second year at no additional cost
  • Transfer switch inspected and minor repairs performed
  • Whole-home power test and a 6-month wellness check
Full plan details
Quarterly care
The Elite Plan
$900per year

Or $75/month with autopay · 12-month agreement

Regular check-ins and added service-call coverage throughout the year.

  • Annual maintenance with OEM oil, filters, and spark plugs; controller reset, battery test, transfer switch inspection, and test start
  • A new battery when needed while enrolled, plus replacement every two years
  • Three quarterly wellness checks
  • Two service calls per year: standard travel and the first hour of labor only
  • Priority scheduling and reminders
Full Elite plan details

Extra labor, parts, and OEM generator or transfer switch repairs are quoted separately. Auto-renews; cancel with 30 days' written notice. Used services are repriced at standard rates if you cancel early; no refunds for services performed.

Mike Glisan of GenTechAPS standing beside his red GenTechAPS truck Mike Glisan · GenTechAPS

Your friendly neighborhood generator guy

Our customers are our friends and neighbors.

GenTechAPS has been headquartered in Longview and serving all of East Texas since 2021. Our customers aren't names in a database. They're the people we see at the store, at church, and on the road, and we don't stop taking care of them when the install is finished.

"What drives me and gives me guidance, my strengths and values, come from my wife Mrs. Tammy, my father Gary, my grandmother Betty, and all of the faithful customers I've had the pleasure of serving over the years. That's what keeps me going."
More about GenTechAPS

Providing reliable power to

East Texas homes, businesses, and cooperatives.

Eastex Telephone Cooperative
Eastex Telephone Cooperative
Upshur Rural Electric Cooperative
Upshur Rural Electric Cooperative
Law Offices of Mike Parker, P.C.
Law Offices of Mike Parker
Bryan's Cheesecakes
Bryan's Cheesecakes
GenTechAPS commercial client
Commercial client

Heard us on the radio?

That's us on KTBB.

Sixty seconds on what we do and why. Give it a listen while you find your generator's model number.

GenTechAPS on KTBB · 60-second spot
Generator installation, repair & maintenance
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Where we work

Headquartered in Longview. On the road all over East Texas.

We install and repair generators all over East Texas from our shop at 5805 W Marshall Ave. If you're in East Texas, we've probably already been to your town.

Longview · Greater East Texas

Get your generator fixed… fast

Tell us what's going on.

Need emergency service? Call and we'll add you to the priority list. Thinking about a new unit? We'll schedule a consultation and an at-home site visit.

903-353-2848
Phones answered 24/7 · Every day 5805 W Marshall Ave · Longview, TX 75604
What do you need?
Do you have power right now?

Faster: call 903-353-2848. We answer around the clock. After-hours, weekend, and holiday rates apply to emergency calls.

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24/7 Call now · 903-353-2848