Stop Overpaying for Solar in New Jersey
May 9, 2026Is Solar Power a Good Investment? How to Calculate Your ROI
May 9, 2026A solar system is a 25-year investment. These mistakes cost homeowners thousands — and most are entirely avoidable with the right information upfront.
For New Jersey homeowners: For New Jersey homeowners, installation mistakes carry an especially high cost — because NJ’s net metering interconnection and SREC registration must be executed correctly for your system to qualify for both programs. A mistake in system design or paperwork can delay or forfeit thousands of dollars in state program income.
1. Wrong System Orientation
South-facing panels at the correct tilt produce the most power. East/west splits can work, but north-facing panels are a significant loss. Your installer should model your specific roof before proposing a layout. In NJ, the optimal tilt angle is 35–40 degrees. A flat roof installation needs tilted racking to get there — not panels laid flat, which significantly underproduces in the winter months when the sun angle is low.
2. Ignoring Shading Analysis
Trees, chimneys, and neighboring buildings can shade panels for hours a day. A proper shading analysis — using tools like Aurora Solar or Helioscope — shows exactly how much shade affects your annual production before anything is installed. In NJ, the shading analysis needs to account for summer conditions, not winter. Deciduous trees that look open in January can cast significant shade on your south-facing panels during peak summer production hours. Jon has seen systems that looked great in the proposal and produced 15–20% below estimate because the shading analysis was done wrong.
3. Wrong Inverter for Your Roof
Multiple roof planes with different orientations need microinverters or power optimizers. A single string inverter will underperform badly in this situation — shading or suboptimal angle on one panel drags down the entire string. Match the inverter technology to your specific roof. For a typical NJ colonial or cape cod with panels on multiple faces, Enphase microinverters eliminate the string shading problem entirely because each panel operates at its own maximum power point.
4. No Roof Assessment Before Install
Panels are designed to last 25–30 years. Your roof should have at least 15 years of life left before you put solar on it. If it doesn’t, replace it first. Removing and reinstalling a solar system for a mid-life roof replacement costs $2,000–$5,000 in labor alone — plus whatever the new roof costs. A pre-install roof inspection by a licensed NJ roofer runs $200–$400 and is one of the best investments you can make before a solar decision.
5. Skipping the Electrical Panel Upgrade
Older NJ homes — particularly anything built before 1980 — often have 100-amp electrical panels that can’t safely handle a solar system on top of a modern appliance load. A 200-amp upgrade typically runs $1,500–$3,500 in NJ and is sometimes required by the township inspector. Some installers skip the recommendation to win the bid and leave you with a code issue or an unsafe setup. Any installer who doesn’t assess your electrical panel before sizing a system isn’t doing a complete job.
6. Not Checking Permit History
Ask your installer how many permits they’ve pulled in your county. Permitting experience matters — a company that knows your local inspector closes jobs faster and without surprises. Solar permitting timelines in NJ vary a lot by municipality. Some townships run 2–3 weeks. Others take 6–8 weeks. An experienced local installer knows the difference and gives you a realistic project timeline. An out-of-state company swooping in for the sale often has no idea how long your town takes.
7. Choosing AC-Coupled Storage Wrong
If you’re adding a battery, make sure it’s compatible with your inverter system. Enphase-to-Enphase and SolarEdge-to-SolarEdge pairings work cleanly. Mixing brands can create compatibility and warranty headaches. Some installers propose generic AC-coupled batteries with Enphase systems — this works, but you lose the efficiency advantages of DC coupling that Enphase IQ batteries provide. Ask your installer specifically which battery is designed for your inverter system before agreeing to any storage proposal.
8. Not Reading the Monitoring Agreement
Some installers charge a monthly monitoring fee. Others include it free. Either way, understand what happens to your monitoring access if the company goes out of business. Enphase’s monitoring platform (Enlighten) is tied to your own Enphase account — you can maintain it independently of your installer. Make sure you have your own login credentials for the monitoring system from day one, separate from your installer’s account. You’d be surprised how many homeowners call years later and can’t access their system data because it was tied to the installer’s account.
9. Missing the Interconnection Deadline
Your utility must approve your system before you can turn it on. An experienced installer manages this process proactively. An inexperienced one lets it drag — costing you months of lost production. In NJ, interconnection applications go to PSE&G, JCP&L, or Atlantic City Electric depending on your service territory. They should be submitted immediately after the building permit is issued — not after the install is done. Delays here directly push out your first SREC generation date.
10. Not Verifying the Warranty
Panel warranties, inverter warranties, and workmanship warranties are three separate things from three separate parties. Read each one. A 25-year panel warranty from a manufacturer that went out of business in year 12 isn’t worth much. With Enphase microinverters, the 25-year warranty is backed by a publicly traded company with a strong balance sheet. Ask your installer the same question about their workmanship warranty — what financial backing exists for a claim in year 15?
The NJ-Specific Mistake That Costs the Most Money
SREC registration. Not skipping it entirely — just delaying it. GATS registration must happen before your system generates its first 1,000 kWh, because SRECs are only earned from registered systems. A 10 kW NJ system hits 1,000 kWh in roughly 6–8 weeks during spring or summer. At $85 per SREC, the first year is worth $850–$935. An installer who waits until you call and ask about it can cost you real money. Confirm GATS registration is in the written contract, and confirm when it will be submitted relative to your install date.
What Good NJ Solar Installation Actually Looks Like
So what does a well-executed install look like from start to finish? First, a proper site assessment — not just a satellite quote, but someone on your roof verifying the actual conditions. Then an engineering design with panel layout, shading analysis, and electrical diagrams that gets submitted with the permit application. Permits pulled with the municipality before a single panel goes up. Installation done in one or two days with a clean worksite at the end. Utility interconnection application filed immediately after the permit is issued. GATS registration submitted within the first two weeks after interconnection approval.
That’s the standard. It’s not complicated — it’s just what experienced NJ installers do as a matter of course. Where homeowners get into trouble is hiring companies who shortcut any part of this process to win the bid on price.
How to Verify Your Installer Did the Job Right
After your install is complete and your system is turned on, here’s how to verify everything was done correctly. First, you should have a physical copy (or digital version) of: the municipal building permit, the electrical permit, the utility interconnection approval letter, and the warranty cards for panels and inverters. If you don’t have these, ask for them. A legitimate installer provides all documentation as a matter of course.
Second, check your monitoring system in the first week of operation. Every panel should show production on sunny days. If you have 22 panels and only 20 show output, something is wrong — call your installer. Early detection of underperformance is covered under warranty; delayed detection means lost production you can’t recover. Third, confirm your GATS registration is submitted. You can verify this by asking your installer for the application confirmation. SRECs only generate from the registration date forward — not retroactively.
The Importance of Post-Install Commissioning
Commissioning is what happens after the panels are mounted and wired — the process of testing the entire system before it’s submitted for utility approval. A proper commissioning test verifies that every panel is producing, every microinverter is communicating, the monitoring system is reporting correctly, and the AC disconnect and safety shutoffs all function. Not every installer does a formal commissioning test. Ask specifically: “What does your commissioning process include, and will I get a commissioning report?” A commissioning report gives you a baseline against which to measure future performance and creates documentation of the system’s condition on install day.
Find Out What Solar Saves You in Your Home
Every home is different — roof angle, usage, utility rate, and local incentives all affect your numbers. Enter your monthly electric bill below for a free savings estimate. Jon reviews every submission personally and follows up within 2 hours.
Avoid These Mistakes With an Experienced NJ Installer
Jon has done 1,675+ installations in New Jersey and neighboring Bucks County PA. Every project includes proper net metering interconnection filing and SREC registration — handled by Jon’s team, not left to you. Book a free call to talk through your project.
