Walk into any solar sales conversation in California and you will hear three options: a power purchase agreement (PPA), a solar loan, or a cash purchase. Each one is framed as the best by whoever is pitching it. This article skips the pitch and runs the actual numbers for a real Temecula or Murrieta household so you can decide which option fits your situation.
The comparison uses a 9 kW system for a home with a $280/mo SCE bill - a typical profile for a 2,500-3,000 sq ft home in Southwest Riverside County. All three options are available to most homeowners. The question is which one makes the most sense for your goals, timeline, and financial situation.
1. How Each Option Works
Power Purchase Agreement (PPA)
With a PPA, you do not buy the solar system. A solar company installs panels on your roof at no cost to you, and you agree to buy the electricity those panels produce at a fixed rate per kilowatt-hour. In California in 2026, typical PPA rates run 13 to 15 cents per kWh - compared to SCE's current residential blended rate of roughly 35 to 48 cents per kWh depending on your tier and time-of-use plan.
The savings start immediately because you are replacing expensive SCE power with cheaper PPA power. The installer owns the system, handles all maintenance and monitoring, and the agreement typically runs 20 to 25 years. Most PPA contracts include an annual escalator of 1 to 3% on the rate, so your PPA cost rises slightly each year - but SCE rates have historically risen faster (averaging about 5 to 7% per year over the past decade).
PPA at a glance
- - $0 upfront
- - You pay 13-15 cents/kWh instead of SCE's 35-48 cents/kWh
- - Installer owns the system and handles all maintenance
- - 20-25 year agreement with 1-3% annual rate escalator
- - No federal tax credit (installer claims it, not you)
- - Immediate monthly savings, no break-even period
Solar Loan
A solar loan lets you own the system while spreading the cost over time - usually 10 to 25 years. You own the system outright and build equity in an asset that increases home value. The 30% federal residential solar tax credit (Section 25D) expired December 31, 2025 and is not available for 2026 purchases, so the full installed cost is what you finance.
Your monthly solar loan payment replaces your utility bill. Typical loan rates in 2026 for solar run 5.99% to 8.99% APR depending on credit score and lender. On a 20-year loan at 6.99% APR for a $27,000 system, the monthly payment is around $209.
The loan becomes net-positive - meaning total savings exceed total payments - at roughly year 9 to 11 for most Temecula-area homeowners. After the loan is paid off, you have free electricity for the remaining life of the system.
Solar loan at a glance
- - $0 down (some lenders require 10-20%)
- - You own the system and build equity in a home asset
- - Monthly loan payment replaces your utility bill
- - Net-positive at roughly year 9-11
- - You handle system insurance; installer covers workmanship warranty
- - System increases home resale value (studies show 3-4% premium)
Cash Purchase
Paying cash is the simplest option and produces the highest lifetime savings. You pay the full installed cost upfront and from that point forward your electricity is essentially free (offset by a small grid connection fee from SCE, typically $10 to $15/mo). The 30% federal residential ITC expired December 31, 2025, so the full cost is what you pay.
For a 9 kW system in Temecula or Murrieta, the installed cost typically runs $25,000 to $27,000. At $280/mo in saved electricity bills, the payback period is roughly 7 to 8 years. After that, you are banking the full savings with no loan payment and no PPA payment.
Cash purchase at a glance
- - Full cost upfront: $25,000-$27,000 for a 9 kW system
- - No federal ITC available in 2026 (expired Dec 31, 2025)
- - Payback period: 7-9 years
- - Highest total savings over 25 years
- - No monthly obligation after install
- - Adds full resale value to home
2. Side-by-Side Numbers: $280/mo SCE Bill, 9 kW System
These numbers use a 9 kW system installed at $27,000 for a home in Temecula or Murrieta. The PPA rate is 14 cents/kWh with a 2% annual escalator. The solar loan is a 20-year term at 6.99% APR. No federal residential ITC applies for 2026 purchases. SCE rate increases assumed at 5% per year (below the 10-year historical average).
| Metric | PPA | Solar Loan | Cash |
|---|---|---|---|
| Upfront cost | $0 | $0 | $27,000 |
| Month 1 savings | ~$168/mo | ~$71/mo net | ~$268/mo |
| PPA: $280 SCE bill replaced by $112 PPA bill (14c x 800 kWh/mo). Loan: $280 bill - $209 loan payment = $71 net. Cash: $280 - $12 grid fee. | |||
| Year 1 savings | ~$2,016 | ~$852 | ~$3,216 |
| Federal tax credit | N/A | N/A (expired 2025) | N/A (expired 2025) |
| Year 10 cumulative savings | ~$25,400 | ~$18,600 net of loan payments | ~$43,200 net of upfront cost |
| Year 25 total savings | ~$78,000 | ~$102,000 | ~$127,000 |
| Who owns system | Installer | You | You |
| Maintenance covered by | Installer | Warranty (25 yr panels, 10 yr workmanship) | Warranty (25 yr panels, 10 yr workmanship) |
| Selling your home | Buyer assumes PPA or you buy out | Adds to sale price | Adds to sale price |
Note: Savings projections assume 5% annual SCE rate increase, 0.5% annual system output degradation, and no unexpected maintenance costs. Individual results vary based on actual usage, roof orientation, and shading.
3. The NEM 3.0 Factor: How California's New Rules Changed the Math
For years, California's Net Energy Metering (NEM) program let solar homeowners send excess power to the grid and receive full retail credit - roughly 30 to 45 cents per kWh exported. Under NEM 3.0 (now called Net Billing), which took effect in April 2023 for new installations, export credits dropped to roughly 5 to 8 cents per kWh. That is an 80% reduction in what you get paid for power you send back to the grid.
What this means practically: right-sizing your system matters more than ever. Under old NEM, you could oversize a system and bank export credits. Under NEM 3.0, oversizing is expensive because excess production earns very little. The correct strategy is to size the system to cover roughly 80 to 90% of your annual consumption, and pair it with a battery if you want to capture evening peak rates (which run 45-48 cents/kWh under SCE's TOU-D plans).
NEM 3.0 and your financing choice
- PPA under NEM 3.0: The installer deals with the export credit math, not you. You just pay the fixed per-kWh rate for what your panels produce. NEM 3.0 mostly hurts oversized systems, so a properly sized PPA is largely unaffected.
- Loan/cash under NEM 3.0: The savings projection above already assumes NEM 3.0 export rates. Self-consumption (using solar power as it is produced) avoids the export rate issue entirely, which is why battery storage pairings have become more popular since 2023.
Bottom line on NEM 3.0: the change shifted the advantage slightly toward PPAs for homeowners who want maximum simplicity. For loan and cash buyers, the right system size plus a battery (especially through SGIP rebates) still produces strong returns - just not by oversizing and selling back to SCE at retail rates.
4. PPAs and Selling Your Home
This is the question that causes the most anxiety about PPAs, and the reality is more manageable than most people think.
When you sell a home with a PPA, you have two options. First, the buyer can assume the PPA. Because a PPA typically means lower electricity costs than the grid rate, most buyers see this as a positive. The new owner takes over your PPA contract, pays the existing per-kWh rate, and continues getting the savings. Most PPA agreements allow transfer with approval from the solar company - a credit check of the buyer is standard.
Second, you can buy out the PPA before sale. The buyout amount is based on the remaining contract value. In the early years of a PPA (years 1 to 5), this can be significant. In later years, it drops. Some sellers negotiate the buyout cost into the sale price.
For loan and cash buyers, the solar system is an asset that typically adds 3 to 4% to a home's resale value in California - though this depends on local buyer demand and the system age.
The honest answer on home sales
A PPA adds a step to the home sale process, not a roadblock. Most real estate agents in Temecula and Murrieta have handled PPA transfers. If your buyer has good credit and SCE rates are still high (almost certain), the transfer is typically straightforward. The risk is a buyer who does not qualify for the transfer and is not interested in a buyout scenario - but this is the exception, not the rule.
5. Who Each Option Is Best For
PPA is best for...
- - Homeowners who want immediate savings without any upfront commitment
- - Households with limited home equity or who do not want to add debt
- - People who want zero maintenance responsibility
- - Homeowners who want $0 upfront with immediate savings
- - Anyone planning to stay in the home 5+ years (long enough to see real savings)
Solar loan is best for...
- - Homeowners with good credit (720+ score for best rates)
- - Homeowners who want to own an equity-building asset
- - People who want to own the system and build equity
- - Households planning to stay 10+ years (past the net-positive threshold)
- - Anyone who wants the option to sell the system with the home as an asset
Cash is best for...
- - Homeowners with $25,000-$27,000 available to deploy
- - Anyone who wants maximum total savings over 25 years
- - Long-term owners with no desire for a monthly payment
- - Long-term owners who want free electricity after year 6-7
- - Investors or landlords calculating property cash flow
6. Common Misconceptions
"A PPA is a trap - you never actually save money"
This comes from people who signed PPAs with high rates or aggressive escalators in the early 2010s, when PPA products were less competitive. A 2026 PPA at 14 cents/kWh against SCE's current 35-48 cents/kWh is a legitimate savings vehicle - it just produces less total savings than owning the system. The trade is: certainty and simplicity now vs. more money later if you own. That trade is reasonable for many households.
"You can't sell your house if you have a PPA"
False. PPAs are transferable. Thousands of California homes with PPAs have sold without issue. The transfer process adds a step, not a crisis. The main risk is a buyer who refuses to assume the PPA and a seller who does not want to pay the buyout - a negotiating issue, not a legal barrier.
"Solar loans are just like car loans"
Key differences: a car depreciates to zero value. Solar panels add value to your home and continue producing savings after the loan is paid off. A car loan funds a depreciating liability. A solar loan funds an asset that generates a financial return. The math is closer to a home improvement loan with a calculable ROI.
"Cash is always the best option"
Cash produces the highest total savings - but only if that $27,000 is not better deployed elsewhere. If you have high-interest debt, an underfunded emergency fund, or investment opportunities returning more than your solar payback rate, a loan or PPA might be the smarter financial move. Run the full picture, not just the solar numbers.
"PPA installers will let maintenance slide because they do not care"
PPA companies are paid per kWh your system produces. A degraded or broken system costs them money. Their financial incentive is to keep your system running at full output - which aligns with your interest as the homeowner. This is actually one structural advantage of the PPA model.
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Get My Free Quote - All 3 Options7. Frequently Asked Questions
What is a power purchase agreement for solar in California?
A power purchase agreement (PPA) is a financing arrangement where a solar company installs panels on your home at no upfront cost. You agree to buy the electricity those panels generate at a fixed per-kWh rate - typically 13 to 15 cents in 2026 - which is well below SCE's current retail rate of 35 to 48 cents/kWh. The installer owns and maintains the system. You pay only for the power produced.
What happens to a solar PPA when I sell my home in California?
You have two choices. First, the buyer can assume the PPA - they take over your contract and continue paying the per-kWh rate. Most buyers view this positively since it means lower electricity costs. The solar company typically requires a credit check of the new owner. Second, you can buy out the remaining contract. The buyout cost decreases as the contract ages. Both paths are viable and happen in California home sales regularly.
Is there still a federal tax credit for solar in California in 2026?
No. The 30% federal residential solar tax credit (Section 25D) expired December 31, 2025. It is not available for homeowner purchases in 2026 regardless of financing method. Commercial solar incentives may still apply to installer-owned systems (PPAs), but homeowners buying or financing a system do not receive a federal credit.
Is a solar loan or PPA better after California's NEM 3.0 changes?
NEM 3.0 reduced grid export credits by about 80%, which hurt oversized systems most. A properly sized solar loan or cash purchase still produces strong returns - the math just favors self-consumption now rather than exporting to the grid. PPAs are slightly more insulated from NEM 3.0 because the installer manages the export math. For loan/cash buyers, the solution is accurate system sizing and, ideally, battery storage to shift self-consumption to evening peak hours.
How long does it take to break even on a solar loan in Temecula or Murrieta?
For a typical 9 kW system with a $280/mo SCE bill, the solar loan becomes net-positive at roughly year 9 to 11. This accounts for loan payments through year 20 at 6.99% APR without any federal tax credit offset. After year 20 when the loan is paid off, the remaining system life (typically 5+ years) produces pure savings with no loan payment.
What solar financing options are available near me in Southwest Riverside County?
All three options - PPA, solar loan, and cash purchase - are available in Temecula, Murrieta, Menifee, Lake Elsinore, and Wildomar. Some installers specialize in one financing type, so it is worth getting quotes that show all three side by side. Local independent installers often provide better loan rates than national companies because they have existing lender relationships in the Inland Empire market.
Which solar financing option has the lowest monthly cost?
It depends on how you count. A PPA has the lowest or zero net cost in month one because your PPA payment replaces your SCE bill at a lower rate. A cash purchase has the lowest ongoing monthly cost after install (just the $10-15 grid connection fee). A solar loan has the highest fixed monthly commitment in the near term, but you own an asset and benefit from the federal tax credit in year one.
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