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Every NJ solar company will tell you their financing option is best. This guide gives you the honest, unbiased numbers for all four ownership models — cash purchase, solar loan, PPA, and lease — with NJ-specific factors like ADI income, net metering, and tax exemptions. The differences are significant: the best option saves $45,000-$75,000 over 25 years, while the worst saves $10,000-$25,000. Same panels, same roof, dramatically different financial outcomes.
Cash Purchase
Best 25-Year Savings
PPA / Lease
Lowest Upfront
$13,500-$15K
ADI Income (Owner)
Yes (Purchase)
NJ Sales Tax Exempt
Quick Answer
In NJ, buying solar (cash or loan) delivers 2-3x the 25-year savings compared to leasing or PPA because you keep all ADI income ($5,000-$12,000), net metering credits, and the property tax exemption benefit. A cash purchase on a typical 8 kW NJ system saves $55,000-$75,000 over 25 years versus $15,000-$25,000 with a lease.
In New Jersey, owning your solar system (whether through cash purchase or a solar loan) delivers significantly better financial returns than leasing or PPA. The reason is simple: NJ has one of the most generous state solar incentive programs in the country — the ADI (Administratively Determined Incentive) — which pays system owners $90-$100 per MWh of electricity produced for 15 years. On a typical 8 kW residential system, that is $14,000+ in guaranteed income over 15 years. When you lease or PPA, the third-party owner keeps this income, not you.
Add in net metering credits (worth $2,000+/year), the 6.625% sales tax exemption on purchase, and the fact that the Section 25D residential federal tax credit expired on December 31, 2025 (making NJ state incentives even more important for financial returns), and the ownership advantage becomes overwhelming. Over 25 years, the gap between buying and leasing is $30,000- $50,000 on the same 8 kW system on the same roof.
That said, leasing and PPAs are not scams — they provide real savings with zero upfront cost, and they are genuinely better than doing nothing. The question is not whether they save money (they do), but whether you are comfortable leaving $30,000-$50,000 in additional savings on the table over 25 years in exchange for the convenience of $0 down and no maintenance responsibility.
25-Year Savings: $45,000-$75,000
Upfront Cost
$22,000-$28,000
Monthly Payment
$0
System Ownership
You own from day one
ADI Income
You receive all ADI income ($90-$100/MWh for 15 years)
Pros
Cons
Best for: Homeowners with available cash or home equity who want maximum financial return and full ownership benefits.
25-Year Savings: $35,000-$60,000
Upfront Cost
$0
Monthly Payment
$120-$200/mo (depends on term & rate)
System Ownership
You own from day one
ADI Income
You receive all ADI income ($90-$100/MWh for 15 years)
Pros
Cons
Best for: Homeowners who want ownership benefits (including ADI income) but prefer to spread the cost over time.
25-Year Savings: $15,000-$30,000
Upfront Cost
$0
Monthly Payment
$0.10-$0.14/kWh (lower than utility rate)
System Ownership
Third-party company owns the system
ADI Income
PPA provider keeps all ADI income
Pros
Cons
Best for: Homeowners who want immediate savings with zero upfront cost and no maintenance responsibility, and are comfortable with a long-term contract.
25-Year Savings: $10,000-$25,000
Upfront Cost
$0
Monthly Payment
$100-$180/mo fixed
System Ownership
Leasing company owns the system
ADI Income
Leasing company keeps all ADI income
Pros
Cons
Best for: Homeowners who want maximum simplicity with a fixed monthly payment and zero maintenance, and are less focused on maximizing total savings.
Assumptions: 8 kW system, 10,400 kWh annual production, current utility rate $0.19/kWh with 3% annual increase, NJ ADI at $90/MWh for 15 years, NJ property and sales tax exemptions applied.
| Model | Upfront | Year 5 Net | Year 10 Net | Year 15 Net | Year 25 Net | ADI Total |
|---|---|---|---|---|---|---|
| Cash Purchase | $24,000 | -$8,720 | $10,160 | $36,260 | $67,100 | $14,040 |
| Solar Loan (15-yr, 6.5%) | $0 | -$2,660 | $2,740 | $16,260 | $51,900 | $14,040 |
| PPA ($0.12/kWh, 2% escalator) | $0 | $3,120 | $4,800 | $5,340 | $21,600 | $0 (provider keeps) |
| Lease ($140/mo, 2% escalator) | $0 | $960 | $1,200 | -$240 | $14,400 | $0 (provider keeps) |
* Net values represent cumulative savings minus cumulative costs. Negative values indicate the investment has not yet paid back. Utility rate increases assumed at 3%/year (NJ historical average). ADI at $90/MWh. Actual results vary by system size, utility, and consumption.
Most NJ solar leases and PPAs include an annual escalator clause that increases your payment by 1.5-2.9% each year. The sales pitch is that utility rates also increase, so your savings should persist. Here is the problem: utility rates are not guaranteed to increase at the same rate as your escalator. If utility rates increase slower (or even decrease due to grid changes), your lease/PPA savings shrink — or your lease payment could actually exceed what you would have paid the utility.
| Year | PPA Rate | Utility Rate | Your Savings |
|---|---|---|---|
| 1 | $0.120/kWh | $0.190/kWh | $0.070/kWh |
| 5 | $0.135/kWh | $0.214/kWh | $0.079/kWh |
| 10 | $0.156/kWh | $0.248/kWh | $0.092/kWh |
| 15 | $0.181/kWh | $0.287/kWh | $0.106/kWh |
| 20 | $0.209/kWh | $0.333/kWh | $0.124/kWh |
| 25 | $0.242/kWh | $0.386/kWh | $0.144/kWh |
This scenario assumes utility rates increase at 3%/year (the NJ historical average). If utility rates increase slower — say 2%/year — the savings gap narrows significantly. At 1%/year utility increase with a 2.9% escalator, the PPA rate could exceed the utility rate by year 18-20, eliminating savings entirely.
Negotiation Tip
If you choose a lease or PPA, negotiate the lowest possible escalator — ideally 0% (fixed rate) or no more than 1.5%. Some providers offer fixed-rate PPAs with no escalator. The difference between a 1.5% and 2.9% escalator on a 25-year contract is $3,000-$5,000+ in total payments. Never accept the first escalator offered — it is always negotiable.
New Jersey has unique solar incentives that make the ownership vs. lease/PPA decision more consequential than in most states. Understanding these NJ-specific factors is critical.
The NJ Administratively Determined Incentive (ADI) pays $90-$100/MWh for 15 years — but only to the system owner. If you buy (cash or loan), you receive the ADI income directly. If you lease or PPA, the third-party owner receives the ADI income. On a typical 8 kW system producing 10.4 MWh/year, this is $936-$1,040/year for 15 years, totaling $14,040-$15,600. This is the single biggest financial difference between owning and leasing/PPA.
NJ net metering credits the system owner at the full retail electricity rate. When you own the system, you keep all net metering credits. With a PPA, the PPA provider typically receives the net metering credits (you pay them for the electricity instead). With a lease, net metering treatment varies by contract — read carefully. The net metering benefit is worth $1,976+/year on an 8 kW system offsetting full annual consumption.
NJ exempts solar installations from property tax assessment (N.J.S.A. 54:4-3.113a) regardless of ownership structure. Whether you buy, lease, or PPA, your property taxes will not increase due to the solar installation. However, if you own the system, the property value increase (estimated at 4.1% in NJ) is fully yours. With a lease or PPA, the value increase is partially offset by the contract obligation on the property.
NJ exempts solar energy systems from the 6.625% state sales tax (N.J.S.A. 54:32B-8.36). This applies only when you purchase the system — cash or loan. On a $24,000 system, the sales tax exemption saves $1,590. With a lease or PPA, you are not purchasing equipment, so this exemption does not directly apply to you (though the PPA/lease provider may benefit, which could be reflected in pricing).
Selling a home with a leased or PPA solar system adds complexity. The buyer must either assume the remaining lease/PPA contract (requires credit qualification and willingness) or you must buy out the contract (early termination fees can be $5,000-$15,000+). Some buyers are deterred by the obligation, potentially affecting your pool of interested buyers. Owned systems, by contrast, increase home value with no contractual complications for the buyer.
Common questions about NJ solar ownership, leasing, and PPA options.
Buying (cash or loan) provides the best financial return in NJ because you keep the ADI income ($90-$100/MWh for 15 years), all net metering credits, and benefit from the sales tax exemption. Over 25 years, buying typically saves $45,000-$75,000 (cash) or $35,000-$60,000 (loan) compared to $10,000-$25,000 for leasing. Leasing makes sense only if you cannot or prefer not to take on the financial commitment of ownership and want zero maintenance responsibility.
A solar lease has a fixed monthly payment regardless of how much electricity the system produces. A PPA (Power Purchase Agreement) charges you per kWh of electricity the system produces — your payment varies with production. Both are $0-down options where a third party owns the system. The key similarity: in both cases, the third-party owner keeps the NJ ADI income and typically the net metering credits, significantly reducing your total financial benefit compared to ownership.
If you lease or PPA, the third-party system owner receives all ADI income. The NJ Administratively Determined Incentive pays $90-$100/MWh for 15 years to the system owner. On a typical 8 kW residential system producing ~10.4 MWh/year, that is $936-$1,040/year for 15 years — a total of $14,040-$15,600 that you forfeit by not owning the system. This is the single biggest financial argument for buying vs. leasing or PPA in NJ.
An escalator clause increases your lease or PPA payment by a fixed percentage each year — typically 1.5-2.9%. The logic is that utility rates also increase, so your lease/PPA savings should persist. However, if utility rates increase slower than the escalator, your savings shrink or even disappear. A 2.9% annual escalator turns a $0.12/kWh PPA rate into $0.242/kWh by year 25. Always negotiate the lowest escalator possible (ideally 0-1.5%), or demand a fixed-rate contract.
Yes, but it adds complexity. The buyer must assume the remaining lease/PPA contract, which requires their credit qualification and agreement to the terms. If the buyer refuses, you may need to buy out the contract with early termination fees typically ranging from $5,000 to $15,000 or more. Some NJ real estate agents report that leased solar systems can deter certain buyers. By contrast, an owned solar system is a straightforward property asset that increases home value without complicating the sale.
A solar loan gives you the same ownership benefits as cash — ADI income, net metering credits, tax exemptions — but adds interest costs. On a $24,000 system with a 15-year loan at 6.5%, you pay approximately $13,560 in interest over the loan life, reducing total 25-year savings from approximately $67,100 (cash) to approximately $51,900. However, the $0-down benefit means you start saving immediately without a large upfront investment. ADI income of $936/yr offsets about 37% of the monthly loan payment.
A solar PPA provides immediate savings with zero upfront cost, which is genuinely valuable if you cannot or prefer not to invest in ownership. However, the 25-year savings ($15,000-$30,000) are significantly less than cash purchase ($45,000-$75,000) or loan ($35,000-$60,000) because the PPA provider keeps the ADI income and net metering credits. You are essentially paying a third party to own a profitable asset on your roof. A PPA is better than doing nothing, but ownership delivers 2-3x more financial benefit.
For maximum financial return: cash purchase. For maximum return with $0 down: solar loan. For simplicity and zero maintenance with $0 down: PPA. For fixed monthly payment with zero responsibility: lease. The best option depends on your financial situation, risk tolerance, and priorities. If you can afford it, buying (cash or loan) is objectively better financially because you keep $14,000+ in ADI income and all net metering credits. If you cannot afford ownership, a PPA is the better non-ownership option because you only pay for what the system produces.
NuWatt provides transparent, side-by-side comparisons of all financing options for your specific home — cash, loan, PPA, and lease — with real NJ incentive projections including ADI income, net metering, and tax exemptions. No pressure, no hidden costs, no "today only" deals.
Related: Cash vs Loan vs Lease • Lease & PPA Guide • Propel Solar Financing