Heating System Check Up

Generator Performance Depends on Correct Sizing and Proper Installation

An undersized generator cannot carry your home’s essential systems during an outage.

An oversized unit costs more to install and run than your home requires. Getting it right means assessing your actual electrical load before recommending a system. Haller’s licensed electricians serve homeowners across Central and Eastern Pennsylvania. We assess your home’s electrical system, fuel access, and the systems you need to protect before recommending a generator. Every installation is code-compliant and backed by our 100% satisfaction guarantee.

(717) 204-8120

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What to Expect During a Generator Installation

Haller follows a proven installation process to ensure your new generator is sized correctly and performs exactly as it should when the power goes out.

We visit your home to assess your electrical system, power needs, and installation requirements. We evaluate which systems you need to keep running during an outage, your home’s total electrical load, and the best placement for the unit. In older homes throughout Lancaster County, fuel availability, transfer switch requirements, and pad placement vary in ways that affect both the equipment selection and what the installation involves. We size for your actual household needs, not a general estimate.

We walk you through the generator options suited to your home, covering output capacity, fuel type, and automatic transfer switch configuration, and give you clear pricing before any work begins. If your electrical panel or fuel supply requires modification to support the new unit correctly, we explain that as part of the recommendation rather than after the fact.

Our team installs your generator, connects it to your electrical system via a code-compliant transfer switch, and places the unit on a stable, properly prepared pad. We fully test the system through a simulated outage cycle before the job is complete. Before we leave, we walk you through how the system operates and what to expect during an actual outage.

(717) 204-8120


What Our Customers Are Saying

100% Satisfaction Guarantee

4.7
Based on 2721 reviews
Ron Roschel
1 day ago
Made a same day appointment which was great.Technician did a thorough test and cleaning.
Dave Martin
2 days ago
Donovan and Devontaye arrived promptly for our new heat pump install. They were polite, professional, and very thorough. They took out the old unit, installed the new one, explained various things to me and answered my questions. Clean up was spotless and all done by 3 PM. Very impressed by these gentleman. Thank you
Jeffrey Esterly
2 days ago
They did a great job and explained everything they did. Highly recommend to anyone that needs their services
Patrick Hogan
2 days ago
Great service. Fast reliable and reasonable.
sam lewis
2 days ago
Reasonable and prompt
William Foulk
2 days ago
He was on time, found the problem and fixed it. Made sure everything was working before he left. Very professional.
Excellent service. Arrived promptly and fixed my problem immediately. Friendliest service I have had in years. I highly recommend Haller for any service that they offer.
Ron Bailey
2 days ago
Sewer line problem: Haller sent Darius out . He was very professional.He did a great job at. & gave me great suggestions on what else can be done. I highly recommend Haller for all your home repairs. They are always there when I need them.
Bob Ambs
3 days ago
Nice job Chris!
Ivy Fasko
6 days ago
I've been using Haller Enterprises for a couple of years now, from purchasing a new heating and AC system from them and having them install it to doing maintenance through the current time. The system installation went without a hitch and was done to where the basement was left in pristine condition. They've always been great. More than great! Timely and tidy & super competent!
Jim Hess
6 days ago
Annual preventative maintenance was easy to schedule when it fit best for me. The Haller rep arrived timely and was very professional. He reviewed his findings with me at the end and gave me plenty of time to ask any questions that I had. There were no hidden up charges or recommendations of expensive "added" services that weren't needed. I trust Haller for a quality job at a fair price and fully recommend them.
Bill Stanley
6 days ago
Water heater service
Tom Weaver
6 days ago
Technician arrived early, was extremely pleasant and courteous. Work was done quickly and to our complete satisfaction. We have used Haller for 20 years and enthusiastically recommend them!
Lynn Ammon
1 week ago
Always kind and courteous Explains things throughly and in language that you can understand
ron roda
1 week ago
Nevin performed his tasks @ hand with,precision, perfection, performance, professionalism & punctuality… Additionally , we will tell our friends & family about Haller & there professionalism….& Most important is that they are reasonably priced…. that is a big big deal! And to top it off was the tech Nevin!!! Dude knows his s#©¥ ! I kinda hung out with him during the job & in that short amount of time I picked up some pointers! 1st Pointer was how to measure connecting copper wire…..2nd…process of elimination…easy to say … but…..Nevin nailed it with his model of patience attitude… If we have issues in the future, which of course will occur, we will be asking for Nevin !
Mike DeVito
1 week ago
Chris did a great job . Explained what he was doing and answered any qustion I had. Highly recommend
Ronald L was wonderful! Provided us with excellent service as well as future service recommendations. He is a wealth of knowledge! I will be using Haller for all of my future needs!
Rick Haller
1 week ago
Haller’s technicians are the best! Personable and technically competent. We always have a great experience!
Sharon Hickey
1 week ago
Awesome customer service.
Michael Campion
1 week ago
I called about the advertised $89 drain-cleaning special for a kitchen sink that was running slowly. After two technicians arrived in separate vans, they told me the special only covered main drains and quoted me $489 to $1,200. If kitchen sinks were excluded, that should have been explained when I scheduled the appointment, not after the technicians showed up. This felt like a bait and switch, and I wouldn’t recommend them. A waste of my time and theirs! UPDATE: Jason, the Senior Plumbing Team Leader, called me later that evening and apologized for the communication breakdown. He explained that the $89 ad had been worded too vaguely about what the special included. He offered to come back personally and clear my kitchen sink at no charge, which he did the next day. While inspecting the drain with a camera, he found significant buildup and two tight 90-degree PVC fittings that prevented the camera from going farther. He recommended replacing them with sweeping bends for a reasonable additional price. Even just running the camera improved the drain, and I appreciated Jason’s follow-up and willingness to honor my original request. I changed my rating from 1 star to 4 stars because of his follow-up and communication. He’s a good guy, and I wouldn’t hesitate to call Haller Enterprise again for service. Any company can make a mistake; what matters is how they respond to it.
chris r
1 week ago
Good, friendly, experienced. Good work ethic. Answered all my concerns
Efficient, courteous, informed what needed to be done. Helpful information what was needed for repairs.
Marie Senatus
1 week ago
They're doing in excellent 👏 jobs thanks for everything
smav120
1 week ago
Nevin did an incredible job maintaining my equipment. He went above and beyond to make sure it was running correctly. I appreciate the communication and recommendations he made. Thanks for the peace of mind, knowing where my equipment stands.
Susan Kennedy
1 week ago
Moises was terrific!

(717) 204-8120

Signs Your Generator Needs Replacing

Generators rarely fail without warning. The signs of a declining system appear well before an unexpected failure during an outage.

Most residential standby generators last 10 to 20 years depending on usage and maintenance. In Pennsylvania, where nor’easters and summer storms can knock out power for days at a time, a generator that is aging or unreliable is a liability. If yours is showing any of the following signs, replacing it on your schedule is better than discovering the problem mid-outage.

If your generator has required service calls more than once in recent years, it may be nearing the end of its practical life. Ongoing repairs add up quickly, and each one represents time the system was unavailable. Homeowners in Harrisburg who have dealt with repeated repairs typically find replacement is the more cost-effective answer.

When your generator struggles to carry essential systems or cannot maintain stable output during an outage, it is no longer meeting your home’s needs. That can mean the unit is undersized for how your household has grown, or it can mean internal components are degrading. Either way, a correctly sized replacement solves it.

Generator components wear with age and use. A system that is more than 15 years old may still start, but aging electrical components and degraded fuel systems reduce reliability exactly when reliability matters most. Homeowners in Allentown with older units often find that upgrading to a current model improves both performance and safety.

Hard starts, unusual noises, or unreliable operation under load are signs of internal issues. A generator that hesitates or stalls during testing is a generator that may not perform during an actual outage in Carlisle or anywhere else. Replacing it removes that uncertainty.

Benefits of Installing a New Generator

A correctly sized and properly installed whole-home generator is reliable, automatic, and largely invisible in your daily routine until you need it. That is exactly what it should be.

These are the practical differences a correct installation makes compared to an undersized, aging, or improperly configured unit.

A standby generator starts automatically when power is lost and carries your home’s essential systems without any action required from you. Heating, cooling, refrigeration, lighting, and medical equipment stay running. Your daily routine in Bethlehem continues with minimal disruption regardless of what is happening on the grid.

Backup power prevents the secondary risks that come with extended outages: frozen pipes during a Pennsylvania winter, food spoilage, loss of sump pump operation during a storm, and loss of lighting and security systems. A correctly installed generator protects the home, not just the comfort.

With a properly sized system in place, you do not have to monitor forecasts with anxiety or make emergency arrangements when a storm is coming. Haller installs and configures generators so the transition to backup power is seamless. You may not even notice the moment it switches over.

Why Homeowners Trust Haller for a Generator Installation

Correct generator installation requires electrical expertise, code compliance, and honest sizing recommendations. Homeowners across Central and Eastern Pennsylvania turn to Haller because we deliver all three.

Haller’s licensed electricians have been serving Pennsylvania homes since 1981 and bring that accumulated regional knowledge to every job.

Our electricians are licensed and trained on the full range of standby generator systems installed across the region. They understand how fuel availability, electrical panel configurations, and local code requirements vary, and they configure installations for the specific conditions in your home — whether that is a property in Easton or a newer build in Exton.

Haller’s electricians arrive prepared, work efficiently, and treat your home with care. We handle pad preparation, transfer switch installation, and system wiring, protect the work area throughout, and leave the site clean. You are not managing the process. We are.

We install generators and configure transfer switches to perform correctly every time the power goes out. That means proper load calculations, correct electrical connections, code-compliant placement, and a full test cycle before we leave. Nothing gets skipped.

Haller is available after the installation for questions, maintenance, and service. If you want the system tested or have questions about performance, we are the team to call.

You receive a clear quote before any work begins. The price we quote is the price you pay.

An undersized generator cannot carry your home’s systems during a prolonged outage. An oversized unit wastes money on installation and fuel. Getting the output capacity right requires an honest assessment of your home’s electrical load and which systems you need to protect. That assessment is where every Haller generator installation starts.

(717) 204-8120


Male Haller tech with tool bag entering residential home smiling.

Contact Haller for a Generator Installation

Since 1981, Haller has been helping homeowners across Central and Eastern Pennsylvania protect their homes with reliable backup power. We are ready to help you do the same. Call or book an appointment online today for generator installation service.


Frequently Asked Questions

How do I know what size generator my home needs?

Generator sizing is determined by your home’s total electrical load and which systems you need to keep running during an outage. A home in York that needs to power heating, cooling, refrigeration, and a sump pump has a different requirement than one focused on lighting and essential appliances only. Our electricians assess your specific load rather than applying a standard formula.

How long does generator installation take?

Most standard generator installations are completed in a single day. The timeline may extend if electrical panel work is required, if the fuel supply needs modification, or if site preparation involves additional work. Our technicians assess all of these factors during the in-home evaluation and give you a clear timeline before work begins.

Where will my generator be installed?

Generators are installed outside your home on a stable, code-compliant pad, positioned to meet local setback requirements and allow for safe operation and service access. We assess your property during the evaluation and recommend the best placement for your specific home.

Do generators start automatically during an outage?

Yes. Whole-home standby generators connect to an automatic transfer switch that detects the loss of utility power and starts the generator within seconds. You do not need to be home or take any action. When utility power returns, the system transfers back automatically.

When is the best time to install a generator?

Before you need it. A generator installation during an active storm warning involves longer lead times and higher urgency than a planned installation. In Pennsylvania, where nor’easters and summer storms can knock out power for extended periods, installing before the season is the right call.

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