Solar Panel FAQ
Answers to 30+ common questions about solar in California
Updated February 2026
Cost & Pricing
How much do solar panels cost in California in 2026?
The average California solar installation costs $2.50-$3.50 per watt before incentives. For a typical 8kW residential system, this translates to $20,000-$28,000 before incentives. Prices vary by region — Los Angeles averages $18,000-$28,000, while Glendale and Burbank are typically $17,000-$26,000 due to lower labor costs.
Why is solar more expensive in California than other states?
California solar costs are slightly higher due to higher labor costs, stricter building codes (Title 24), and stronger consumer protections. However, California also has the highest electricity rates in the continental US ($0.30-$0.45/kWh for investor-owned utilities), making solar savings proportionally greater and payback periods similar to cheaper states.
What's the average payback period for solar in California?
Most California homeowners see payback in 6-10 years depending on system cost, energy usage, utility rates, and whether batteries are included. After payback, your system generates essentially free electricity for another 15-20+ years. Municipal utility customers (LADWP, GWP, BWP, PWP) often see faster payback due to favorable net metering.
Is it cheaper to pay cash or finance solar?
Paying cash results in the lowest total cost and fastest payback. However, solar loans allow you to start saving immediately with $0 down. With current rates, monthly loan payments are often lower than your previous utility bill, creating positive cash flow from day one. Leases and PPAs are also options, but you don't own the system.
How much can I save with solar panels?
California homeowners typically save $1,500-$3,500 per year on electricity depending on system size and usage. Over 25 years, total savings often exceed $40,000-$80,000. The exact amount depends on your utility rates, energy consumption, system size, and whether you add battery storage.
Are there hidden costs with solar installation?
Reputable installers include all costs in their quote: equipment, labor, permitting, interconnection, and monitoring. Watch for add-on costs like main panel upgrades (if needed, typically $1,500-$3,000), tree trimming for shade removal, or roof repairs. At Ecobill, we include all costs upfront — no hidden fees.
NEM 3.0 & Net Metering
What is NEM 3.0 in California?
NEM 3.0 (officially Net Billing Tariff) is California's current solar policy for new installations connecting to PG&E, SCE, or SDG&E. Enacted in April 2023, it reduced export credits by approximately 75% compared to NEM 2.0. Under NEM 3.0, electricity you send to the grid earns $0.03-$0.08/kWh on average, compared to full retail rates under NEM 2.0.
Does NEM 3.0 apply to LADWP, GWP, BWP, or PWP customers?
No. NEM 3.0 only applies to California's investor-owned utilities (PG&E, SCE, SDG&E). Municipal utilities — including LADWP (Los Angeles), Glendale Water & Power, Burbank Water and Power, and Pasadena Water and Power — have their own separate net metering programs with generally more favorable terms.
Is solar still worth it under NEM 3.0?
Yes. While export credits are lower, California has some of the highest electricity rates in the country ($0.30-$0.45/kWh). Every kWh you use directly from your panels saves the full retail rate. Adding a battery restores much of the economic benefit by storing solar for evening use instead of exporting to the grid.
Should I add a battery under NEM 3.0?
For most homeowners on PG&E, SCE, or SDG&E who use electricity primarily in the evening, a battery significantly improves NEM 3.0 economics. The battery stores excess daytime solar for evening use when rates are highest and export credits lowest. California's SGIP program also offers rebates to reduce battery costs.
Can I get grandfathered into NEM 2.0?
No. NEM 2.0 closed to new applications in April 2023. Existing NEM 2.0 customers are grandfathered for 20 years from their interconnection date. All new installations on PG&E, SCE, or SDG&E must use the NEM 3.0 Net Billing Tariff.
Installation Process
How long does solar installation take?
Most residential solar installations take 4-8 weeks from contract to power-on. The timeline includes system design (1-2 days), local permitting (1-3 weeks), physical installation (1-3 days), and utility interconnection approval (2-4 weeks). The actual roof work is typically completed in 1-2 days.
Do I need to replace my roof before installing solar?
If your roof is more than 15-20 years old, it's generally recommended to replace or repair it before solar installation, since removing and reinstalling panels later adds cost. If your roof has 10+ years of life left, solar can typically be installed directly. Your installer should assess roof condition during the site survey.
What happens during a solar site survey?
During a site survey, a technician evaluates your roof's condition, pitch, orientation, and shading. They'll also inspect your electrical panel to determine if an upgrade is needed. Modern installers like Ecobill use AI-powered satellite analysis for initial design, with an in-person verification before installation begins.
Will solar panels damage my roof?
Professionally installed solar panels should not damage your roof. Mounting systems are designed to be watertight, using flashing and sealant at each attachment point. Many installers, including Ecobill (a master roofing company), also offer roof warranties. Panels can actually protect the roof area they cover from UV degradation and weather.
Do I need permits for solar in California?
Yes. All solar installations in California require local building permits and utility interconnection approval. Your installer handles all permitting as part of the project. California's Solar Permitting Guidebook has streamlined the process, and most cities now offer expedited review for standard residential systems.
Financing & Incentives
What solar incentives are available in California in 2026?
California offers several solar incentives: property tax exemption (100% of system value exempt), SGIP battery rebates (up to $1,000/kWh for equity customers), and municipal utility rebates (LADWP, GWP, BWP, PWP each have their own programs). Federal incentive guidelines have changed in 2026 — check current eligibility for the latest details.
What is the SGIP battery rebate?
The Self-Generation Incentive Program (SGIP) provides rebates for home battery storage in California. General market customers receive a base rebate, while equity-eligible customers (low-income, in fire zones, or medically vulnerable) can receive up to $1,000 per kWh of battery capacity. A typical 13.5 kWh Tesla Powerwall could see significant cost reduction.
Can I finance solar with $0 down?
Yes. Solar loans allow you to install a system with no upfront cost. Monthly loan payments are often lower than your previous electricity bill, creating immediate positive cash flow. Loan terms typically range from 10-25 years. While you pay interest, you own the system and benefit from all incentives and increased home value.
What's the difference between a solar lease and a solar loan?
With a solar loan, you own the system and receive all incentives and home value increases. With a solar lease or PPA (Power Purchase Agreement), a third party owns the system on your roof — you pay a fixed monthly rate or per-kWh rate that's lower than utility rates. Loans generally provide better long-term economics; leases offer simplicity.
Does solar increase my home value?
Yes. Studies show solar panels increase home value by approximately 3-4% on average. In California, solar installations are 100% exempt from property tax increases, so your home value goes up without higher taxes. Homes with solar also sell faster on average, particularly in markets like Los Angeles, Pasadena, and Glendale where buyers expect solar.
Equipment & Technology
What are the best solar panels for California homes?
Top solar panels for California include high-efficiency models from manufacturers like Q CELLS, REC, Panasonic, and Canadian Solar. Key factors to consider: efficiency (21-23% for premium panels), temperature coefficient (important in hot CA summers), warranty length (25-30 years), and degradation rate (<0.3%/year for top-tier panels).
What's the difference between microinverters and string inverters?
Microinverters are installed on each panel, optimizing performance individually. They're better for roofs with partial shading or multiple orientations. String inverters connect all panels in a series — they're cheaper but less flexible. For most California homes with complex roof lines, microinverters (like Enphase) are the preferred choice.
How long do solar panels last?
Modern solar panels are warrantied for 25-30 years and typically continue producing electricity for 30-40+ years. Panels degrade at roughly 0.25-0.5% per year, meaning after 25 years they still produce approximately 87-94% of their original capacity. Inverters may need replacement after 12-25 years depending on type.
Do I need a battery with solar panels?
Batteries aren't required but are increasingly popular in California for three reasons: backup power during outages (especially important in fire-prone areas), maximizing self-consumption under NEM 3.0, and taking advantage of SGIP rebates. Municipal utility customers (LADWP, GWP, etc.) may benefit less from batteries since their net metering is more favorable.
What size solar system do I need?
System size depends on your electricity usage, roof space, and goals. Average California homes need 6-10 kW. To estimate: divide your annual kWh usage by 1,600 (average California solar production per kW). For example, if you use 10,000 kWh/year, you'd need approximately a 6.25 kW system. Your installer will right-size based on your specific usage.
Maintenance & Monitoring
Do solar panels require maintenance?
Solar panels require very little maintenance. Rain typically cleans them sufficiently in California. Occasional inspection (annually) is recommended to check for debris, wildlife nesting, or equipment issues. Many systems include monitoring apps that alert you to any performance drops, making maintenance largely hands-off.
How do I monitor my solar panel production?
Most modern solar systems include a monitoring app (e.g., Enphase Enlighten, SolarEdge) that shows real-time production, consumption, and savings. You can track daily, monthly, and yearly output from your phone. Ecobill includes monitoring setup and training as part of every installation.
What happens to solar panels in bad weather?
Solar panels are engineered to withstand California weather including high winds (up to 140+ mph), hail (1-inch diameter at 50 mph), and extreme heat. Panels do produce less in cloudy conditions but don't stop entirely — expect about 10-25% of normal output on overcast days. Annual production estimates account for weather patterns.
What warranty comes with solar panels?
Solar panels typically come with two warranties: a product warranty (12-25 years covering defects) and a performance warranty (25-30 years guaranteeing minimum output, usually 80-90% at end of term). Inverters carry 12-25 year warranties depending on type. Your installer should also provide a workmanship warranty covering the installation itself.
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