Prices in this guide were last checked in October 2026 and show what to expect going into 2027.
How much does solar panel installation cost in 2027? Going into the new year, the California average is about $2.52 per watt. That puts a typical 8.4 kW home solar system at roughly $21,200 before incentives, according to EnergySage marketplace data from October 2026. Your own number depends on how much power you use, your roof, your utility and whether you add a battery.
Cost is only half the decision. More than five million solar systems are now installed across the US, and 97% of them are residential. Solar is still one of the bigger purchases most families make, so before you sign anything, you deserve a clear breakdown of both sides.
This guide covers what a home solar system costs by size and by city, what changes the price, the real pros and cons of solar energy in 2027, what solar panel maintenance costs, how residential solar installation works, and how to choose the right installer for your home.
Key takeaways
Going into 2027, the average solar panel installation cost in California is $2.52 per watt. For the average 8.42 kW system, that works out to $21,200 before any incentives, and most quotes land between $18,020 and $24,380. Nationally, the average is $2.60 per watt, and a typical 12 kW system costs about $31,135.
| California | United States |
|---|---|---|
Average cost per watt | $2.52 | $2.60 |
Average system size | 8.42 kW | About 12 kW |
Average cost before incentives | $21,200 | $31,135 |
Typical price range | $18,020 to $24,380 | $27,526 to $33,869 |
Average payback period | 7.7 years | About 10 years |
Source: EnergySage California solar cost data and EnergySage national solar cost data, October 2026.
California systems cost less in total than the national average because they are smaller, not because the price per watt is much lower.
These are the most recent averages available. New federal tariffs take effect on December 4, 2026, so quotes in 2027 may come in 3% to 5% higher. There is more on that below.
Installers price solar by the watt so you can compare quotes of different sizes. Take the total price and divide it by the system size in watts. A $21,200 quote for an 8,420 watt system is $2.52 per watt. That figure includes installation, not just the panels.
The figures in this guide are averages from quotes that homeowners received through the EnergySage marketplace. They are a benchmark, not a HomeLink price list. Your quote can be higher or lower depending on your roof, your main electrical panel and the equipment you choose.
Home solar system cost rises with system size, while the price per watt stays close to the same. This table uses California’s latest averages.
System size | Average cost before incentives |
|---|---|
3 kW | $7,556 |
4 kW | $10,075 |
5 kW | $12,593 |
6 kW | $15,112 |
7 kW | $17,631 |
8 kW | $20,149 |
9 kW | $22,668 |
10 kW | $25,187 |
Source: EnergySage, October 2026.
System size follows your electricity use, not your square footage. As a rough guide for Southern California, divide your yearly kWh by about 1,640 to get a system size in kW. That assumes 4.5 peak sun hours a day and is a starting point only.
Monthly electricity use | Approximate system size | Approximate cost at $2.52 per watt |
|---|---|---|
500 kWh | 3.7 kW | $9,200 |
750 kWh | 5.5 kW | $13,800 |
1,000 kWh | 7.3 kW | $18,400 |
1,500 kWh | 11.0 kW | $27,600 |
These are estimates. Shade, roof direction, an EV or a pool will move the number, which is why a real design starts with 12 months of your utility bills. Our guide to how many kilowatts a California home needs explains the math.
The average solar panel cost in Lancaster is $2.53 per watt going into 2027. A typical 7.42 kW system costs about $18,787 before incentives, and most quotes fall between $15,969 and $21,605.
System size in Lancaster | Average cost before incentives |
|---|---|
5 kW | $12,654 |
6 kW | $15,185 |
7 kW | $17,716 |
8 kW | $20,247 |
10 kW | $25,309 |
Source: EnergySage Lancaster solar cost data, October 2026.
The average payback period in Lancaster is about 7.8 years, and EnergySage estimates 25-year savings of about $103,800 for a system bought with cash. Summer cooling is a big part of that. Homeowners comparing solar quotes in Lancaster report an average electric bill of $422 a month, although people shopping for solar tend to have higher bills than their neighbors.
Desert dust matters here too. Panels in the Antelope Valley need cleaning more often than panels near the coast, so include that in your budget. The maintenance section below has the numbers.
HomeLink Solar installs in Lancaster with its own crews and no subcontractors. See our solar installation in Lancaster page, or get a free quote for your address.
City | Cost per watt | Average system size | Average cost before incentives | Average payback |
|---|---|---|---|---|
$2.53 | 7.42 kW | $18,787 | 7.8 years | |
$2.53 | 7.62 kW | $19,323 | 7.7 years | |
$2.46 | 9.43 kW | $23,212 | 7.7 years | |
$2.51 | 10.0 kW | $25,055 | 5.8 years | |
$2.46 | 7.92 kW | $19,518 | 7.8 years | |
$2.41 | 11.31 kW | $27,307 | 7.4 years | |
$2.42 | 8.79 kW | $21,248 | 7.6 years | |
$2.34 | 6.54 kW | $15,274 | 7.7 years | |
$2.56 | 6.52 kW | $16,679 | 7.2 years |
Source: EnergySage city pages, data from August to October 2026. Links to each are in the Sources section.
The price per watt barely moves from city to city. What changes the total is system size, which follows how much electricity homes in each area use.
The solar panel cost for home installations comes down to six things:
Cost item | Share of total |
|---|---|
Equipment, including panels, inverters and racking | 46% |
Sales and marketing | 18% |
Company overhead | 11% |
Installer profit | 11% |
Permitting and interconnection | 8% |
Installation labor | 7% |
Source: EnergySage, based on a 2021 NREL study. Shares are rounded, so they add up to slightly more than 100%.
The panels themselves are only about 12% of the total. That is why switching to a cheaper panel rarely changes a quote by much, and why the installer you choose matters more than the brand on the box.
A home battery in California averages $1,037 per kWh installed. A 13 kWh battery averages $13,482 before incentives, with a typical range of $11,460 to $15,504, according to EnergySage storage data from October 2026. Add that to the average solar system and a full solar and battery setup comes to roughly $34,700.
Under California’s net billing rules, a battery is also what lets you use your own solar power in the evening. See how long a home battery can run a house for runtimes by load.
The 30% federal Residential Clean Energy Credit is not available for systems placed in service after December 31, 2025, according to the IRS. If you buy a system with cash or a loan in 2027, plan without it.
Leases and power purchase agreements work differently. The company that owns the system can still claim a federal credit and may pass part of it on in its pricing, but only for systems placed in service by December 31, 2027, unless construction began before July 4, 2026, according to EnergySage. That makes 2027 the last year for most leased and PPA systems to benefit.
In California, the SGIP Residential Solar and Storage Equity program offers up to $1,100 per kWh of battery storage and up to $3,100 per kW of solar for low-income households, according to the CPUC. Funds are limited, so check availability before you count on it.
Tax situations differ. Talk to a qualified tax professional about your own case.
Most likely, a little. New federal tariffs on imported solar components take effect on December 4, 2026. SolarReviews estimates they will add 3% to 5% to installed costs, or about $600 to $1,100 on a 7.2 kW California system. We cover the full math in the real cost of waiting to install solar.
Option | Upfront cost | Good to know |
|---|---|---|
Cash | Full price | Lowest lifetime cost. No federal credit for purchases |
Solar loan | Little or none | You own the system. Interest adds to the total cost |
Lease or PPA | Usually none | The provider owns the system. Lower lifetime savings. Federal credit for the provider ends after 2027 |
$0 large installation cost | For qualifying homeowners in select cities. You pay for the energy the system produces at a set program rate, on your existing utility bill |
For a 7.42 kW system in Lancaster, EnergySage estimates monthly payments of about $136 with a PPA, $144 with a lease and $157 with a loan.
Solar energy works by converting sunlight into electricity using photovoltaic (PV) cells in your solar panels. That electricity powers your home directly during daylight hours, while any surplus is either stored in a battery system or sent back to the grid for a credit under your utility’s net billing program.
Going into 2027, the average home solar system in California is about 8.4 kW, and closer to 12 kW nationally. After decades of falling panel costs, the price of solar hardware has stabilized, but it is still one of the larger home improvement investments most families make. That is why understanding both the upside and the trade-offs matters.
This is the most immediate benefit of residential solar installation. How much you save depends on your utility rates and system size, and the savings are largest where rates are highest. SDG&E’s average residential rate was about 45.7 cents per kWh in January 2026, and SCE’s was about 34.4 cents in mid-2026.
Over 25 years, EnergySage estimates these average savings for a system bought with cash:
These estimates assume utility rates keep rising. Your own result depends on your usage and rate plan.
Solar is an investment with measurable returns. The average payback period in California is about 7.7 years, according to EnergySage, and most Southern California cities fall between about 6 and 8 years. After that, your system keeps generating electricity for the rest of its 25-year life. Few home improvements offer a comparable ROI.
California electricity rates have climbed far faster than inflation. Since 2014, residential rates are up 121% at PG&E, 88% at SDG&E and 80% at SCE, against 36% for California inflation. SCE alone raised rates 17% in 2022, 7.2% in 2024 and about 10% in October 2025.
More is already scheduled for 2027. The CPUC has authorized a further $522 million increase in SCE’s base revenue for 2027, and SCE has separately asked for a 1.1% rise in residential rates, about $2.20 a month for a typical customer, which is still under review.
Rates do not rise every single year, but the long-term direction has been up. Every kilowatt-hour your roof produces is one you do not buy at whatever the utility charges that year. See how much SCE rates have increased and why California electric bills are so high.
A Zillow analysis found that homes with solar sold for an average of 4.1% more than comparable homes without it. On a $600,000 Southern California home, that would be about $24,600. Treat it as a guide, not a guarantee. The study dates from 2019, results vary by market (the Riverside area came in at 2.7%), and buyers generally value a system you own more than one you lease.
This surprises many homeowners: solar panel maintenance is low-effort. Solar panels have no moving parts, no combustion, and no mechanical components to wear down. The main ongoing tasks are periodic cleaning (which we cover in detail below) and an annual system inspection. Most manufacturers back panels with 25-year performance warranties.
Solar panels generate electricity with no combustion and no direct emissions while they run. Over a year, a typical home system offsets several thousand pounds of CO2. For homeowners motivated by both financial and environmental goals, solar is one of the higher-impact changes available.
The 30% federal tax credit ended for homeowner-owned systems placed in service after December 31, 2025. These options remain in 2027:
Pairing residential solar installation with battery storage (Tesla Powerwall, Franklin Battery) means your home can run independently during grid outages. In California’s wildfire-prone regions, and for homeowners in areas with unreliable grid infrastructure, this backup capability has real practical value, not just financial value. Our guide to why backup power is becoming essential in California covers this in more detail.
Benefit | What It Means in 2027 |
|---|---|
Lower electricity bills | About $124,000 in estimated 25-year savings for the average California system |
Strong ROI | About 6 to 8 year payback in Southern California; 25-year system lifespan |
Rate protection | Less exposure as utility rates rise |
Home value increase | About 4.1% average resale premium (Zillow, 2019) |
Low solar panel maintenance | $390 to $720 per year; no moving parts |
Environmental impact | No direct emissions during operation |
Incentives available | SGIP equity rebate, net billing, $0 upfront programs |
Grid independence | Battery storage provides outage protection |
The average residential solar installation in California costs about $21,200 before incentives going into 2027, and about $31,135 nationally, where systems are larger. With the federal tax credit gone for purchased systems, more of that cost stays with the homeowner. Homeowners who purchase systems outright face the most significant upfront hurdle.
The good news: options with little or no upfront cost, such as loans, leases, PPAs and HomeLink’s Power Choice Program, make solar accessible for qualified homeowners.
Solar panels produce electricity in proportion to the sunlight they receive. Cloudy days, rain, and shorter winter days all reduce daily output. While a well-designed system accounts for seasonal variation, there is no guarantee of consistent production on any given day.
Battery storage significantly mitigates this issue by storing surplus energy from sunny periods for use during low-production periods.
California’s shift to NEM 3.0 (Net Billing Tariff) in 2023 reduced the credit rate homeowners receive for surplus solar energy exported to the grid. Under NEM 3.0, excess solar is credited at a lower “avoided cost” rate rather than the full retail rate. This means a solar system sized purely for export is less profitable than it was under NEM 2.0.
The workaround: pair solar with battery storage to maximize self-consumption and minimize how much you export.
A good installer assesses rooftop suitability before installation. Roofs that face north, have heavy shading from trees or adjacent buildings, or that are nearing end of structural life may not be ideal candidates. Steep pitches, unusual materials (clay tile, wood shake), or roofs with limited unshaded south-facing area can reduce output and increase installation complexity.
Without the federal credit, payback takes longer than it used to. The national average is now about 10 years. In California, where utility rates are high, payback averages about 7.7 years. Homeowners in states with very low electricity rates (under $0.12 per kWh) may see payback stretch well beyond 10 years, which weakens the financial case.
Solar panels lose a small amount of output each year. An NREL review of nearly 2,000 measurements found a median degradation rate of 0.5% per year, which means a 25-year-old system still produces roughly 88% of its original output. The decline is slow and predictable, but it does mean your system’s savings shrink slightly over its lifetime.
Regular solar panel cleaning does not stop degradation, but it does prevent the separate, avoidable losses caused by dirt on the glass.
Drawback | Mitigation Strategy |
|---|---|
High upfront cost | $0-down financing, Power Choice Program |
Weather dependency | Battery storage (Powerwall, Franklin Battery) |
NEM 3.0 lower export credits | Maximize self-consumption with battery |
Roof suitability required | Professional site assessment before commit |
Long payback in low-rate areas | Focus on high-rate markets (SCE, SDG&E) |
Gradual panel degradation | Quality panels + regular cleaning service |
Solar panel maintenance is one of the most misunderstood aspects of going solar. Many homeowners assume it is expensive or complicated. In reality, solar is one of the lowest-maintenance home energy systems available, but that does not mean zero maintenance.
Here is a complete breakdown of what solar panel maintenance involves in 2027, what it costs, and when to call a professional solar panel cleaning service.
Solar panel maintenance covers four core activities:
Dirt, dust, bird droppings, pollen, and airborne debris build up on panel surfaces over time and block sunlight from reaching the photovoltaic cells. NREL reports that soiling causes annual energy losses of up to 7% in parts of the United States, and far more in very dusty regions. Regular cleaning restores that lost production.
A professional inspection checks electrical connections, mounting hardware, inverter performance, wiring integrity, and overall system health. Annual inspections catch small issues before they become expensive repairs.
String inverters typically last 10 to 15 years and will need at least one replacement during a 25-year system lifespan. Microinverters last longer (up to 25 years) but cost more per unit to replace. Monitoring your system’s daily output through your utility or inverter app makes it easy to spot performance drops that indicate an inverter issue.
Most modern solar systems include monitoring software (through the inverter or a dedicated app) that tracks daily and cumulative energy production. Homeowners should check this monthly and flag any output that falls below normal seasonal expectations.
Based on the latest HomeAdvisor data, updated in June 2026:
Service | Average Cost | Frequency |
|---|---|---|
Professional panel cleaning | $200 to $500 per visit | 1 to 2 times per year |
Annual system inspection | $150 to $350 | Once per year |
Full maintenance package (cleaning + inspection) | $390 to $720 per year | Annual |
Inverter replacement (string) | $1,000 to $2,500 | Once in 10 to 15 years |
Inverter replacement (microinverter) | $200 to $400 per unit | Once in 20 to 25 years |
Minor wiring or mounting repairs | $100 to $300 | As needed |
Panel crack repair or replacement | $200 to $600 | As needed |
The average annual solar panel maintenance cost is approximately $520, with most homeowners spending between $390 and $720 per year on cleaning and inspections combined.
Cleaning frequency depends heavily on your location, local environment, and weather patterns. Here is a regional guide:
Region / Climate | Recommended Cleaning Frequency | Key Reason |
|---|---|---|
Desert / High Desert (Inland Empire, Antelope Valley) | Every 1 to 3 months in dry season | Dust, sand, and minimal rain accumulation |
Suburban Southern California (LA, Orange County) | 2 to 3 times per year | Moderate dust, pollen, urban particulates |
Coastal California (San Diego, Ventura) | Quarterly | Salt spray and airborne sea particulates |
High pollen regions | Add 1 extra cleaning in spring | Heavy pollen deposition March to May |
Areas with heavy bird activity | After nesting season | Bird droppings highly concentrated |
Regions with regular rainfall | 1 to 2 times per year | Natural rain cleans light soiling |
General rule: If you cannot see clear reflectivity on your panels from the ground, they are overdue for a professional cleaning.
Factor | DIY Cleaning | Professional Service |
|---|---|---|
Cost | $0 to $50 (supplies only) | $200 to $500 per visit |
Safety | Risk of roof falls; not recommended for 2-story+ roofs | Fully equipped with harness and safety gear |
Effectiveness | Adequate for ground-mounted or easily accessible panels | Superior for rooftop systems; no streaks, no scratches |
Warranty compliance | Risk of voiding warranty with wrong products | Uses manufacturer-approved methods and solutions |
Inspection included | No | Often included in visit |
Frequency flexibility | On demand | Scheduled service plans available |
Recommendation: Homeowners with single-story homes and safely accessible ground-level panels can perform gentle cleaning with a soft brush and garden hose. For rooftop systems, especially on two-story homes, hiring a professional solar panel cleaning service is the safer and more effective choice. Never use abrasive materials, high-pressure washing, or soap-based cleaners not approved by your panel manufacturer.
Watch for these indicators that your system needs attention:
If your system needs attention, you can request service from HomeLink Solar.
Understanding the full residential solar installation process helps homeowners know what to expect, how long it takes, and what to ask the installer they choose.
A local solar advisor visits your home (or conducts a virtual assessment) to evaluate your roof, review your utility bills, and design a system sized for your actual usage. Reputable installers give you a detailed proposal with no obligation.
What to ask: How is system size determined? What equipment brands are specified? Is the quote all-inclusive (permits, labor, interconnection)?
Your system is custom-designed based on your roof dimensions, orientation, shading map, utility rate plan, and energy goals. A well-designed residential solar installation maximizes your annual production and self-consumption.
All residential solar installation projects require building permits from your local city or county, plus an interconnection application with your utility (SCE, SDG&E, LADWP, etc.). The permitting phase typically takes 2 to 4 weeks. Your installer should handle all permits. You should never need to visit a permit office yourself.
For most residential homes, the physical solar panel installation is completed in a single day by a trained in-house crew. The process involves: mounting the racking system to your roof, installing the panels, running conduit and wiring, and connecting the inverter. A thorough crew will leave your roof clean and your attic undisturbed. You can see finished projects on our installs page.
After installation, your local building department conducts a final inspection. Once passed, your installer submits the interconnection approval request to your utility. SCE, LADWP, and SDG&E typically process approvals within 1 to 4 weeks. Your system cannot legally be turned on until permission to operate (PTO) is granted.
Once PTO is received, your system is switched on and your monitoring app goes live. Your home uses its own solar power first, and anything extra earns net billing credits from your utility. Your utility bill reduction begins from day one.
Phase | Typical Duration |
|---|---|
Site assessment and proposal | 1 to 3 days |
System design and contract | 3 to 7 days |
Permit applications | 2 to 4 weeks |
Installation day | 1 day |
Utility interconnection approval | 1 to 4 weeks |
Total: Consultation to Live System | 4 to 8 weeks |
Note: Timeline varies by utility, city, and local permit workload. HomeLink Solar manages every step for homeowners, including all permits and utility paperwork.
Not all solar installers are equal. The solar industry still has a minority of companies that use high-pressure sales, subcontract installations to uncertified crews, or overpromise savings. Here is what to look for.
Factor | What to Check | Why It Matters |
|---|---|---|
CSLB License (California) | Verify at cslb.ca.gov | Unlicensed contractors = no warranty protection |
In-house installation crew | Ask: “Do you use subcontractors?” | Subcontractors = accountability gap |
Equipment brands specified | Request panel and inverter model numbers | Tier-1 brands = better performance and warranty |
Permit handling | Confirm they file all city and utility permits | Unpermitted systems cannot be sold or insured |
Monitoring platform | Ask what monitoring app is provided | Ongoing performance visibility |
Warranty terms | Panel (25yr), inverter (10 to 25yr), workmanship (10yr minimum) | Coverage gap = out-of-pocket repair risk |
Local reviews | Check Google, Yelp, BBB | Verify 4.5+ star average with substantial review count |
No-pressure quote process | Gauge the consultation experience | High-pressure = red flag |
HomeLink Solar holds CSLB License #1117534, uses its own crews with no subcontractors, and has a 4.9-star rating across nearly 400 Google reviews. For a longer checklist, read how to choose a solar installer and our guide to solar subcontractor risk.
Solar energy in 2027 is not perfect, and no energy solution is. The upfront cost is real. The federal tax credit for purchased systems is gone. NEM 3.0 has shifted the math for California homeowners toward batteries. And not every home is an ideal candidate.
But for most Southern California homeowners paying SCE, SDG&E, or LADWP rates, the numbers still favor solar: an average cost near $2.52 per watt, payback in about 6 to 8 years, a 25-year system lifespan and low solar panel maintenance costs. With new tariffs in place from December 2026 and more utility rate increases already scheduled, waiting is unlikely to make it cheaper.
The key is choosing the right installer: one that uses in-house crews, is fully CSLB licensed, handles all permits, installs quality equipment and stays available for service after the install.
If you are ready to see what solar would cost for your home, a free no-obligation quote is the best first step. Get your free quote or call 833-538-7546.
Prices are as of October 2026 unless noted.
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