Solar Financing Options in California 2026: Loans, PACE, Cash, and Leases Under NEM 3.0

Why NEM 3.0 Made the Financing Decision More Important

Before April 2023, California homeowners on NEM 2.0 received near-retail credit for every kilowatt-hour they sent back to the grid. SCE customers in Temecula with a 7 kW system producing 11,000 kWh per year could expect payback periods of 6-8 years regardless of whether they paid cash or took a 20-year loan at 3.99% APR. The export credit was generous enough to absorb the cost of financing.

Under NEM 3.0, export compensation dropped to Avoided Cost Calculator rates: roughly 5-8 cents per kWh depending on the time of day and season. The evening peak window on SCE (4pm to 9pm) pays slightly more, around 10-12 cents, which is why battery storage became a critical companion to new NEM 3.0 systems. But even with a battery maximizing self-consumption, the effective payback period for a typical Temecula system is now 9-13 years on a cash purchase.

Add a 6.99% effective interest rate from a dealer-fee solar loan, and that payback can extend to 14-17 years. Add a 25-year PACE loan at 8.5% and you may be paying more in financing costs than the system saves in electricity over its lifetime. This is the core issue: the lower the export value, the more every dollar of financing cost erodes your return. The choice between a cash purchase, a low-cost loan, and a high-rate PACE product is no longer a minor variable. It is often the single biggest factor in whether your solar investment makes sense.

Cash Purchase: ROI Math with Real Temecula Numbers

Cash buyers get the cleanest economics and the highest lifetime return. Here is what a representative Temecula homeowner can expect in 2026.

Assume a 2,200 square foot home in Temecula with an average monthly SCE bill of $280 on the TOU-D-PRIME rate schedule. A properly sized system for that home runs approximately 7.5 kW, producing around 12,000 kWh per year given Temecula's average 5.8 peak sun hours per day. Installed cost in 2026 for a quality system from a CSLB-licensed contractor ranges from $28,000 to $33,000 before incentives.

Apply the 30% federal Investment Tax Credit and the net cost falls to $19,600 to $23,100. If the homeowner also qualifies for the California Self-Generation Incentive Program (SGIP) on a paired battery, that adds another $2,700 to $5,400 in direct rebates, reducing net cost further. At a net system cost of $20,000 and annual savings of $2,200 per year (accounting for the NEM 3.0 export rate reduction and the assumption that roughly 65% of production is self-consumed), the simple payback period is just over 9 years.

With a 25-year system warranty and expected production degradation of 0.5% per year, the system generates net savings of approximately $35,000 to $42,000 over 25 years after accounting for the original investment. That is a 175-210% return on a $20,000 net investment. No other home improvement produces comparable returns at that risk level.

The challenge is that most Temecula homeowners do not have $28,000 to $33,000 in liquid cash. This is where financing enters. Each financing path changes those 25-year numbers significantly.

The Dealer Fee Trap: How Solar Loans Inflate Your Cost by 20-40%

This is the most important section in this guide for most California homeowners.

When a solar installer offers you a 1.99% or 2.99% promotional loan rate, that rate is real. But the loan balance it applies to is not the price of your system. It includes a dealer fee, which is a markup the lender pays the installer as an origination commission. The installer receives the dealer fee immediately when the loan closes. You pay it back over the full loan term, plus interest.

Here is a concrete example common in Riverside County. A system quoted at $30,000 is offered with a 25-year loan at 2.99% APR. The installer is using a lender with a 30% dealer fee. The actual loan amount originated is $30,000 divided by 0.70, which equals $42,857. You borrowed $42,857 to buy a $30,000 system. The extra $12,857 is the dealer fee. Your monthly payment on a 25-year, 2.99% loan at $42,857 is $202. You will pay $202 times 300 months, totaling $60,600 over the life of the loan, for a system that cost the installer roughly $18,000-22,000 to buy and install.

The effective interest rate on your actual system cost of $30,000, given that you pay $60,600 over 25 years, is approximately 6.4% when dealer fees are included. Not 2.99%.

Dealer fees exist across almost all installer-affiliated solar loans in California. Typical dealer fee ranges: GreenSky runs 20-35%. Mosaic runs 15-30%. Dividend Finance runs 25-40% on low-rate products. The only way to avoid dealer fees entirely is to use a loan that is not originated through your installer. LightStream, a home equity loan, or a personal loan from your own bank will have no dealer fee because the installer has no relationship with that lender.

Solar Loan Types: Secured vs Unsecured and What Each Means for You

Solar loans split into two categories based on collateral.

Unsecured solar loans do not use your home as collateral. They are personal loans sized for solar installations. Approval is based primarily on credit score and debt-to-income ratio. They close in 1-3 days with minimal paperwork, no appraisal, and no title involvement. Rates for strong credit borrowers (720 and above) on a 12-year term start around 3.99% without dealer fees. The tradeoff is that unsecured loans carry more risk for the lender, so rates are higher than secured alternatives for the same borrower profile.

Secured solar loans use your home as collateral. This includes home equity loans (fixed rate, lump sum), home equity lines of credit (variable rate, draw as needed), and cash-out refinances. Secured loans offer lower rates because the lender has a claim on your home if you default. In 2026, home equity loan rates sit at 7.5-8.5% on 10-15 year terms for most Riverside County borrowers. HELOC rates are prime plus 0.5-1%, currently putting them at 7.75-8.75%, but the rate can move with prime.

The comparison is not as simple as lower rate wins. A 7.5% home equity loan with no dealer fees beats a 2.99% advertised solar loan with a 30% dealer fee (effective rate approximately 6.4%). But a 6.99% HELOC with no dealer fees is essentially equal to that same dealer-fee loan. The math only becomes clear when you strip out the dealer fee and compare total dollars paid.

One important note on secured vs unsecured for the ITC: both qualify. The federal tax credit applies as long as you own the system. The collateral type does not affect eligibility.

Comparing the Major Solar Lenders: GreenSky, Mosaic, Dividend Finance, and LightStream

Most California homeowners encounter these four lenders through their solar installers. Each has distinct characteristics that matter to the final cost.

PACE and HERO Financing: Pros, Cons, and When It Actually Makes Sense

Property Assessed Clean Energy (PACE) financing is unique in California because it does not function like a traditional loan. Instead of borrowing from a bank, you enter an agreement where your county records an assessment against your property. Your PACE payments are collected as a line item on your property tax bill twice per year. In Riverside County, PACE programs operate primarily through HERO by Renovate America, Ygrene Energy Fund, and Benji.

The primary advantage of PACE is accessibility. There is no minimum credit score. Approval is based on property equity and payment history on your property taxes, not your personal credit score. For homeowners with credit scores below 600 who cannot qualify for any solar loan, PACE may be the only path to system ownership other than a lease.

A second advantage is that PACE debt is attached to the property, not the person. If you sell your home before the PACE assessment is paid off, the buyer assumes the remaining balance. This is a feature or a liability depending on your perspective. Sellers often find that a PACE balance must be disclosed on title and that some buyers and their lenders are unwilling to assume it. Many Riverside County real estate agents report that PACE assessments complicate closings and are a common source of negotiation friction.

The significant disadvantages of PACE are cost and aggressive sales tactics. PACE interest rates run 6-10% in 2026 on terms up to 25 years. Administrative fees and recording costs add another 1-3% of the financed amount. On a $30,000 system financed at 8.5% over 25 years, total payments reach approximately $70,000. That is $40,000 in interest and fees on a system that cost $30,000 before incentives.

PACE is also notorious for aggressive door-to-door sales practices in Riverside County. Contractors working on commission have historically emphasized the no credit check and no money down features without disclosing the total cost. California's Department of Financial Protection and Innovation (DFPI) has issued multiple enforcement actions against PACE administrators and contractors over deceptive marketing. If a contractor pushes PACE without disclosing the interest rate and total payment amount upfront, walk away.

When does PACE make sense? For homeowners with credit scores below 600 who own their home free and clear or have significant equity, who plan to stay in the property for 15 or more years, and who have exhausted all other financing options. In that specific scenario, PACE may be the only viable path to solar ownership. For everyone else, there is a better option.

The Federal Investment Tax Credit: Timing and Eligibility with Each Financing Option

The 30% federal Investment Tax Credit remains in effect through at least 2032 under the Inflation Reduction Act. It is a dollar-for-dollar reduction in the income taxes you owe, not a deduction from taxable income. On a $30,000 system, the ITC is $9,000. If you owe $9,000 or more in federal income taxes in the year your system is placed in service, you receive the full $9,000 credit. If you owe less, you carry the unused portion forward to future tax years.

Ownership is the critical requirement. You must own the system to claim the ITC. Cash purchases and all loan types (solar loans, HELOCs, home equity loans, personal loans) qualify because you own the panels. Solar leases and PPAs do not qualify because the financing company owns the equipment. This is one of the primary reasons loans outperform leases for most homeowners who have federal tax liability.

PACE financing qualifies for the ITC because you own the system, despite the debt being assessed against the property. However, the ITC does not reduce your PACE balance directly. It reduces your federal tax bill. If you plan to use the ITC refund to pay down a PACE assessment, confirm with a tax professional that your specific tax situation allows you to use the full credit amount in the first year.

Timing matters for the GreenSky 18-month same-as-cash product. The system must be placed in service (fully installed and operational, not just contracted) in the year you plan to claim the ITC. If you install in November 2026, you claim the ITC on your 2026 tax return filed in April 2027. The 18-month clock on the same-as-cash product starts at installation, so you would need to pay the principal by approximately May 2028 to avoid deferred interest.

California SGIP Battery Rebate: Compatibility with Loans vs Leases

The California Self-Generation Incentive Program (SGIP) provides direct cash rebates for battery storage systems installed in the state. In SCE territory covering Temecula, Murrieta, Menifee, and Lake Elsinore, SGIP rebates run approximately $200-400 per kWh of usable battery capacity in 2026, depending on the current funding step and whether your address qualifies for the Equity or Equity Resiliency adder.

For a 13.5 kWh Tesla Powerwall 3 or a 15 kWh Enphase IQ Battery stack, SGIP rebates can range from $2,700 to $6,000. These rebates are paid directly to the system owner after installation and inspection. If you own the system through a cash purchase or loan, you receive the SGIP payment. If you lease the system, the leasing company receives the rebate.

SGIP funding operates in budget steps. When a step's allocation is exhausted, the program closes to new reservations until the next step opens. Reservations are first-come, first-served within each step. As of early 2026, SGIP Step 7 in SCE territory has seen periodic closures and reopenings. Your installer should submit an SGIP reservation at the same time as your solar permit application to lock in the current step's incentive level.

Under NEM 3.0, adding a battery significantly changes the economics of any financed solar system. A battery allows you to store excess midday production and self-consume it during the 4pm-9pm high-rate window, avoiding expensive grid imports. This improves your bill savings and shortens payback, which in turn reduces the risk that a financed system ends up costing more in interest than it saves in electricity. If you are financing a solar system under NEM 3.0, seriously consider including a battery in the financed amount and capturing the SGIP rebate.

Solar Leases and PPAs: Why They Are Less Favorable Under NEM 3.0

Under a solar lease, you pay a fixed monthly amount to use the solar panels installed on your roof. Under a Power Purchase Agreement (PPA), you pay per kilowatt-hour for the electricity the panels produce, rather than a fixed monthly fee. In both cases, the financing company owns the equipment. You do not own the system, do not claim the ITC, and do not receive the SGIP battery rebate.

The appeal of leases and PPAs is zero upfront cost, no credit risk to your home, predictable bills, and the leasing company handling maintenance and monitoring. For homeowners who cannot qualify for any loan and do not want PACE debt on their property title, a lease or PPA is often the only remaining option. For retirees on fixed incomes who have limited federal tax liability and no use for the ITC, a lease can be financially reasonable.

Under NEM 3.0, leases and PPAs carry specific disadvantages that did not exist at the same scale under NEM 2.0. First, most PPAs include annual escalators of 2-3% per year. Under NEM 2.0, when the system exported significant value to the grid, the escalator was partially offset by rising electricity rates. Under NEM 3.0, export value is low and fixed, so the escalator is pure cost increase against a stagnant benefit. By year 15 of a PPA with a 2.9% escalator, you are paying roughly 53% more per kWh than you paid in year 1.

Second, leasing companies sized systems under NEM 2.0 to maximize export. Under NEM 3.0, those oversized systems export large amounts of power at 5-8 cents per kWh. If you signed a lease before April 2023 and grandfathered into NEM 2.0, your system economics are fine. If you are considering a new lease in 2026, the leasing company should be sizing the system for self-consumption, not export. Verify that the proposed system matches your consumption profile and that the installer is not oversizing to collect a larger commission.

Selling a home with a solar lease involves transferring the lease to the buyer or paying the lease buyout. Lease buyouts in the middle years of a 20-25 year agreement can run $15,000-25,000. Many Riverside County real estate agents report that homes with leased solar systems sell more slowly and at a slight discount compared to homes with owned systems. Homeowners who own their system through a loan, by contrast, typically see a property value increase of $3,000-5,000 per kW installed, representing roughly $4 of added value for every $1 in annual savings.

Home Equity Loans and HELOCs: The Cheapest Financing Option for Most Homeowners

For Temecula homeowners who bought before 2022, home values have increased substantially. The median Temecula home in 2022-2024 ranged from $580,000 to $650,000. Many homeowners in the area have $150,000 to $250,000 in accessible equity. Using that equity to finance solar through a home equity loan or HELOC is typically the lowest total-cost approach available.

Home equity loans are fixed-rate, fixed-term second mortgages. In 2026, rates for a $30,000 home equity loan on a 15-year term run approximately 7.5-8.5% for borrowers with good credit in Riverside County. There is no dealer fee. Interest may be tax-deductible if the loan funds are used to improve the home. Total interest paid over 15 years at 8% on $30,000 is approximately $20,400, making total repayment $50,400.

Compare that to a 25-year dealer-fee solar loan at 2.99% advertised with a 30% dealer fee. The actual loan balance is $42,857. Monthly payment is $202. Total payments over 25 years: $60,600. The home equity loan costs less in absolute terms despite the higher nominal interest rate, because the principal is lower (no dealer fee inflation) and the term is shorter.

HELOCs function as revolving lines of credit secured by your home. Current HELOC rates in 2026 sit at prime plus 0.5-1%, putting most Riverside County borrowers at 7.75-8.75%. The draw period is typically 10 years (interest-only payments), followed by a 10-20 year repayment period. HELOCs are particularly useful if you are planning solar plus battery storage, since you can draw in stages as each component is installed and inspected.

The risk of home equity financing is the same risk as any second mortgage: your home secures the debt. If you cannot make payments, you could lose the home. This is a meaningful consideration for homeowners on fixed incomes or with variable income. For homeowners with stable income, good equity, and a 700-plus credit score, the math strongly favors equity-based financing over any dealer-fee solar loan.

Note that HELOCs have variable rates. If the Federal Reserve raises rates between now and 2028, your HELOC payment increases. If you want rate certainty, a fixed home equity loan is the better choice over a HELOC for solar financing.

Credit Score Requirements for Solar Loans in 2026

Credit score affects both your eligibility for solar loans and the rate you receive. Here is a practical breakdown for Temecula and Murrieta homeowners.

If your credit score is in the 640-679 range, spending 6-12 months improving it before applying for solar financing can save you thousands of dollars. Paying down revolving balances to below 30% utilization and avoiding new hard inquiries often moves scores 20-40 points within two to three billing cycles. That improvement can shift you from the GreenSky high-rate tier to LightStream eligibility, potentially saving $5,000-10,000 in total financing cost on a $30,000 system.

How to Compare Total Financing Cost: APR vs Effective Interest Rate with Dealer Fees

The APR disclosed on a solar loan is legally required to include origination fees paid by the borrower. It is not required to include dealer fees paid by the lender to the installer, because dealer fees are technically a separate transaction between the lender and the contractor. This is why a 2.99% APR solar loan can have an effective rate of 6-8%.

To calculate your effective rate including the dealer fee, use this formula: effective rate equals the stated APR applied to the gross loan amount (including dealer fee), with payments calculated against that gross balance, recalculated using the actual system purchase price as the loan amount.

Simpler approach: just ask for the total dollars you will pay over the life of the loan. Multiply the monthly payment by the number of months. Subtract the system price (not the loan amount). That number is your total financing cost. Divide it by the system price and you get your total interest as a percentage of what the system actually cost you. Annualize it over the loan term to get something comparable to an APR.

For a practical comparison, build a simple three-column table: loan option name, total payments (monthly payment times term), and total financing cost (total payments minus system price). Rank them by total financing cost, not by APR. The ranking often reverses what the advertised rates suggest.

Refinancing an Existing Solar Loan When Rates Drop

Homeowners who locked in dealer-fee solar loans in 2021-2023 at effective rates of 7-10% now have refinancing options as lending conditions shift. Refinancing a solar loan follows the same logic as refinancing a mortgage: it makes sense when your new rate plus closing costs produces a lower total payment than staying on the current loan.

Several paths exist for refinancing an existing solar loan. First, if you have built significant home equity since the original installation, a home equity loan or cash-out refinance can pay off the solar loan balance and convert it to lower-rate secured debt. Second, LightStream offers solar loan refinancing for existing borrowers who can demonstrate improved credit since the original loan. Third, if the Federal Reserve reduces the federal funds rate over 2026-2027, HELOC rates will fall correspondingly and the refinancing math improves further.

When evaluating a refinance, calculate the breakeven: divide closing costs and any prepayment penalties by the monthly savings from the new rate. If the breakeven is under 24 months and you plan to stay in the home, refinancing is usually the right call. If you are within 3-5 years of payoff on the original loan, the math often does not favor refinancing even at a meaningfully lower rate.

Practical Decision Tree: Which Financing Option Fits Your Situation

Use this framework to identify your starting path. Each answer leads to the next question.

SCE-Specific Considerations for Temecula and SW Riverside County

Temecula, Murrieta, Menifee, Lake Elsinore, and Wildomar are all in Southern California Edison territory. SCE operates under NEM 3.0 for all new interconnection applications submitted after April 14, 2023. This means any solar system installed in this area in 2024, 2025, or 2026 automatically falls under NEM 3.0 rules unless the homeowner received a specific grandfathering exception (which expired in most cases by early 2024).

SCE's current time-of-use rate schedules affect the economics of every financing option discussed in this guide. The TOU-D-4-9PM rate has a peak window of 4pm to 9pm where rates reach $0.44-0.55 per kWh during summer weekdays. Off-peak rates (9pm to 4pm) run $0.28-0.34 per kWh. Solar production peaks between 10am and 2pm, before the high-rate window. This timing mismatch is the core reason battery storage has become economically important under NEM 3.0.

For homeowners evaluating whether to add a battery to a financed solar system, the SCE rate differential creates a clear calculation. Each kWh stored in a battery and discharged during the 4-9pm window instead of imported from the grid saves approximately $0.32-0.47 per kWh. A 13.5 kWh battery that fully cycles once per day saves $4.32-6.35 per day in SCE electricity cost, or $1,577-2,318 per year. That savings rate makes a battery financially compelling even under financing, provided the effective interest rate on the financed battery is below 8%.

Parts of Temecula and Murrieta also fall within SCE High Fire Threat District zones. Public Safety Power Shutoffs (PSPS) have occurred in these areas during Santa Ana wind events. A battery providing resilience during PSPS events has a value that does not appear in bill-savings calculations but is real to homeowners who have experienced multi-day outages. This is particularly relevant for households with medical equipment, young children, or elderly residents who depend on climate control during extreme heat events.

Frequently Asked Questions: Solar Financing in California 2026