Cost Per Solar Lead: Benchmarks Every Installer Should Know

Understanding what a solar lead should cost — by channel — is foundational to running a profitable installation business. Without benchmarks, you can't evaluate your marketing spend, negotiate with lead vendors, or identify which channels are underperforming. Here are the 2026 industry standards for solar lead costs across all major acquisition channels.

Defining "Lead" in Solar

Before benchmarks, a definition: in the solar industry, a "lead" is typically defined as a qualified homeowner contact who has expressed interest in a solar assessment. The definition varies by source:

• Phone lead: An inbound call from a homeowner inquiring about solar — high intent, typically the highest quality
• Form lead: A web form submission requesting more information or a quote — medium to high intent depending on the form's qualifying questions
• Appointment: A booked consultation — the highest quality "lead" type, often classified separately from leads
• Canvassing lead: A homeowner who expressed interest at the door and agreed to an appointment — quality varies significantly by canvasser skill
• Mailer lead: A homeowner who responded to a postcard via phone, QR code, or URL — typically high quality due to self-selection

2026 Solar Lead Cost Benchmarks by Channel

Channel	Cost Per Lead	Lead Quality	Close Rate	Effective Cost Per Install
Referral from existing customer	$50–$200	Very High	30–50%	$100–$670
Organic SEO (inbound call/form)	$20–$80	High	15–25%	$80–$533
Google Search Ads (call/form)	$150–$400	High	12–22%	$680–$3,333
AI-targeted direct mail response	$80–$250	High	15–25%	$320–$1,667
Generic direct mail response	$200–$600	Medium	10–18%	$1,111–$6,000
Facebook/Instagram Lead Ads	$80–$200	Medium	6–12%	$667–$3,333
Canvassing appointment	$200–$600	Medium–Low	8–15%	$1,333–$7,500
Purchased shared leads	$200–$500	Low	2–6%	$3,333–$25,000
Purchased exclusive leads	$400–$800	Medium	8–15%	$2,667–$10,000
Yelp/HomeAdvisor/Angi	$50–$150	Low–Medium	3–8%	$625–$5,000

Why Cost Per Lead Is the Wrong Primary Metric

Installers often focus on cost per lead (CPL) when they should be focused on cost per install (CPI). A $50 Facebook lead that closes at 4% has an effective CPI of $1,250. A $300 Google Ads lead that closes at 20% has an effective CPI of $1,500. They're comparable — but the Google lead came from someone who was actively searching for solar, making them a better candidate for referrals and customer lifetime value.

CPI calculation: CPL ÷ Close Rate = Cost Per Install. Track this number for every channel, every month.

The Hidden Cost: Cancellation Rate

CPI calculations get worse when you factor in cancellations. If you generate 100 leads, convert 20 to signed contracts, and 5 cancel before installation, your effective install count is 15 — raising your true CPI by 33%.

Cancellation rates by channel:

• Referrals: 5–10% cancellation
• Inbound (Google, organic): 8–15%
• AI direct mail: 8–14%
• Facebook Ads: 15–25%
• Canvassing: 25–40%
• Purchased leads: 20–35%

Canvassing's high cancellation rate (driven by buyer's remorse from high-pressure in-person sales) is a significant hidden cost that makes door-to-door far more expensive than CPI calculations based solely on conversion rate suggest.

What Installers in Top-Performing Markets Are Paying

California (High Competition)

Google Ads CPCs for "solar installer Los Angeles" reach $45–$65/click in 2026. At 3–5% form conversion rate, that's $900–$2,170 per lead — among the most expensive in the country. This drives California installers toward AI direct mail and referral-based growth to maintain sustainable CAC (Customer Acquisition Cost).

Target CPI for California: $800–$2,500 for a well-run multi-channel operation. Anything above $3,000 and your margins are being squeezed.

Arizona/Nevada/New Mexico (Moderate Competition)

Google CPC: $18–$35. Form conversion: 4–7%. CPL: $260–$875. Target CPI: $600–$1,800.

Florida/Texas (Competitive, Large Markets)

Google CPC: $20–$40. Form conversion: 3–6%. CPL: $330–$1,333. Target CPI: $700–$2,200.

How to Track Your Actual Lead Costs

Surprisingly, many installers don't track CPL by channel with any precision. The minimum tracking you need:

• Unique phone numbers per channel (Google Ads, Facebook, direct mail, etc.) using a call tracking service like CallRail or WhatConverts
• UTM parameters on all digital ads to track web form submissions to source in your CRM
• Ask every lead "How did you hear about us?" and record in CRM
• Build a monthly dashboard showing: leads, appointments, contracts, installs, and CPL/CPI by channel

Without attribution tracking, you're flying blind — and you'll naturally continue spending on channels that feel productive rather than channels that actually are.