Expert Installation of a Solar System | 2026 Guide
Quick Answer
A residential installation of a solar system typically takes 1 to 3 days of physical work on your property, but the full process from consultation to system activation spans 60 to 90 days — most of that time is permitting and utility approval, not the installation itself. TerraSol handles every step for homeowners across PA, NJ, and DE, including permits, utility coordination, and incentive paperwork.
Why Understanding the Solar Installation Process Matters
Installing solar panels is one of the most significant home improvements you can make. A properly designed solar energy system can eliminate 70–100% of your electricity bill, dramatically increase your home's value, and — with today’s federal and state financial incentives — pay for itself in as little as 6 to 9 years.
But solar panel installation is also a process with multiple stages, several decision points, and real consequences if any step is handled poorly. Choosing the wrong solar company, skipping permits, or installing a system sized incorrectly for your actual energy production needs can cost you thousands.
This guide walks you through every stage of solar installation, the way a qualified installer like TerraSol actually does it — from your first energy audit through the day your system goes live and starts saving money on every bill.
If you're a homeowner in Chester County, Delaware County, Montgomery County, Philadelphia, South Jersey, or Delaware, this guide is written specifically for the regulations, utility companies, and solar conditions in your region.
The Complete Guide to the Installation of a Solar System (2026 Update)
Once you decide you want a solar-power system for your home, choosing a contractor to install the system is your most important decision. Your contractor, somebody like TerraSol Energies Inc. in Glen Mills, Pa., will walk you through the details.
Some things will vary depending on your home and the amount of electricity you hope to generate with your system, but here’s a general idea of what the installation process looks like:
Your system installers will visit your home for a consultation. They’ll help you decide the best placement for solar panels based on the size of the solar system you need, the amount of sun your area receives, and whether you want the system to be connected to the electrical power grid. You may be able to have your solar panel system installed on your grounds, rather than on the roof.
Paperwork
PaperworkIt’s not glamorous, but as with any construction project, there’s a certain amount of paperwork to be done. Luckily, your installer will handle most of it, including obtaining construction permits, filling out forms for government incentive programs, and financing programs.
Installation
Installation of your new solar power system will take one to three days, depending on the size of the system. Your installer will prepare the roof or the area where the panels will be installed. The next step is installing wiring so the solar system is connected to your home’s electrical panel and to the general power system.
Once the wiring is in place, the installers will build racks to support the solar panels. Once the racks are firmly attached to the roof and leveled, the installers will lay the solar panels.
The last step is to connect an inverter, which converts the direct current (DC) electricity generated by the solar panels into alternating current (AC) that can be used in your home. The inverter is usually installed close to the main electrical panel.
This can be either outdoors or indoors. But since it has been made using solid-state electronics and usually performs best in cool conditions, it is important to remember to protect it from direct sunlight.
Read our article about how to maximize your solar power system to learn more.
Tied to the Grid
If you’re worried that a solar panel system will have you in the dark on a stormy day, then you’ll be happy to know that most customers choose a grid-tied system.
This means your home or business stays connected to the local utility grid, so during the night or on a cloudy day, you’ll still have power. If your system creates more electricity than you use, you can receive credits that go towards your electric bill.
A solar panel system will dramatically reduce your electricity costs and set you on the path to energy independence. With the solar industry growing, there’s never been a better time than now to get on board with a solar panel system.
Before You Install Solar Panels: What to Know First
Is Your Home a Good Candidate?
Not every home is an ideal candidate for solar, and a reputable solar company will tell you that honestly before asking you to sign anything. Key factors your solar installer will assess include:
Roof condition and orientation. South-facing roof surfaces receive the most sunlight in Pennsylvania, New Jersey, and Delaware, making them ideal for a solar array. East and west orientations also work well with modern solar PV panels — typically producing 10–20% less than a south-facing installation. A qualified installer will model your actual production based on your roof's specific pitch, orientation, and shading.
Roof age and structural integrity. Solar panels last 25–30 years. If your roof has less than 10 years of remaining life, replacing it before installing panels avoids costly removal and reinstallation later. TerraSol includes a roof assessment in every site visit.
Energy consumption. Your solar array should be sized to your home's actual electricity use. Reviewing 12 months of utility bills tells your installer how much electricity your household uses annually and what system size will produce the right amount of clean energy for your needs.
Homeowners association rules. If your property falls within an HOA, check your CC&Rs for any solar panel restrictions before proceeding.
Local regulations and utility interconnection requirements. Every municipality in PA, NJ, and DE has its own local building and electrical permit requirements. In New Jersey, PSEG and JCP&L have specific interconnection procedures.
Read article: 5 Facts You Didn't Know About Solar
2025 Financial Incentives Summary for PA, NJ & DE Homeowners
| Incentive | Amount | Who Qualifies |
|---|---|---|
| Federal Investment Tax Credit (ITC) | 30% of the total system cost | All homeowners with federal tax liability |
| Pennsylvania SREC Credits | Varies by market | PA homeowners with grid-tied systems |
| New Jersey SuSI Program | Fixed rate per kWh for 15 years | NJ homeowners |
| Delaware DNREC Green Energy Rebate | Up to $1,000 | DE homeowners |
| Net Metering Credit | 1:1 utility credit for excess production | PA, NJ, DE homeowners with grid-tied systems |
NOTE: Incentive programs and values are subject to change. TerraSol provides current incentive information at the time of your consultation.
Why DIY solar panels are risky.
It’s worth addressing this directly. DIY solar installation and kits are technically possible for experienced electrical contractors, but for most homeowners, they carry serious risks: voided equipment warranties, failed permit inspections for necessary permits, potential roof damage from having solar panels installed with improper racking, and utility interconnection rejections.
A professional solar installer carries liability insurance, employs certified installers, and guarantees the work—protections a DIY installation cannot provide when transitioning to renewable energy.
For more information about installing a solar power system for your home or business, call TerraSol Energies at 888-873-9995. We install solar systems in Pennsylvania, New Jersey, and Delaware.
Frequently Asked Questions
How long does solar installation take from start to finish?
The complete solar installation process typically takes 60 to 90 days in Pennsylvania, New Jersey, and Delaware. The physical installation of solar panels on your roof takes 1 to 3 days. The remaining time is permitting (2–4 weeks) and utility approval for Permission to Operate (2–4 weeks).
Do I need permits to install solar panels?
Yes. Every residential solar installation in PA, NJ, and DE requires building and electrical permits from your local municipality, as well as a utility interconnection application. TerraSol handles all permit applications and utility paperwork as part of our standard installation process.
How much electricity will my solar panels produce?
Your system’s energy production depends on your panel count, panel efficiency, roof orientation, local shading, and your region's solar resource. A typical 8–10 kW residential solar installation in southeastern Pennsylvania produces 9,000–12,000 kWh annually.
Can I install solar panels myself (DIY solar panels)?
Technically, yes, but it’s generally not recommended. DIY solar panel installations in PA, NJ, and DE are subject to the same permit and inspection requirements as professional installations. Errors in wiring, racking, or interconnection can void manufacturer warranties, fail inspections, and create safety hazards. Professional installation by a qualified installer ensures code compliance, warranty validity, and optimal performance.
What financial incentives are available for solar installation in Pennsylvania?
In 2025, Pennsylvania homeowners can take advantage of the federal 30% Investment Tax Credit, Pennsylvania’s SREC program, and net metering credits from PECO, PPL, Met-Ed, and other utilities. Combined, these financial incentives can reduce the net cost of a solar installation by 30–50%, depending on your system size and electricity usage.
Will solar panels work in winter in Pennsylvania and New Jersey?
Yes. Solar PV panels generate electricity year-round in the mid-Atlantic region. Cold temperatures actually improve panel efficiency compared to summer heat. Shorter winter days reduce daily production relative to summer, but a properly sized solar array accounts for seasonal variation in its annual production model.
