Solar Lead Sources Ranked: Referrals 37.5%, Facebook Near Zero

A solar sales manager we talked to swore Facebook ads were a scam. "We spent a fortune, closed almost nothing. Total waste."

Same week, a company two states over was closing a third of their referral appointments and couldn't figure out why their reps loved Mondays.

Same product. Same price range. Wildly different results. The difference wasn't the salesmen. It was the source of the lead — and how it got handled the minute it came in.

Here's every solar lead source ranked by what it actually closes. Then the part nobody wants to hear about why the ranking lies a little.

What close rate can a solar company actually expect?

Across all sources, under 15%. With an average sales cycle of 8.9 months.

That's the brutal baseline. But "under 15%" is an average, and the average hides everything that matters. Some sources close at nearly 40%. Some close near zero. Lump them together and you learn nothing.

So here's the real spread, source by source.

Solar lead sources, ranked by real close rate

| Lead source | Close rate | Net conversion | Notes | |---|---|---|---| | Referrals | 37.5% | 29.2% | Warm. Trust already done. | | Solarize programs | — | 33% | Community-organized, pre-educated | | Radio | 35% | 30% | High booking rate (90%) | | Yelp | — | 23.5% | Intent-driven search | | Phone (unknown source) | 25% | 17% | Mixed quality | | Google | — | 15% | Search intent, colder than referral | | Facebook ads | Low | Low | "Complete waste of time" — usually | | Lead aggregators (EnergySage, Angi) | Lowest | Lowest | Shared, resold, often junk |

Referrals win because the homeowner shows up already trusting you. A neighbor vouched. The trust step — the hardest part of a solar sale after SunPower's collapse spooked the whole market — is done before you say a word.

Aggregators lose because they're the opposite. The same homeowner gets sold to 3-5 companies, bombarded with calls, and shuts down. Roughly 30% of third-party leads are fraudulent or junk anyway. The industry loses over $1.4 billion a year to fake leads. Aggregator leads are the first thing to cut.

So the ranking looks simple: chase referrals, dump Facebook. Right?

Not quite.

Why Facebook ads close near zero — and why that's not Facebook's fault

Here's the uncomfortable truth. Facebook isn't at the bottom because the channel is broken. It's at the bottom because of how solar companies run it.

Most treat a Facebook lead exactly like a marketplace lead. They let it sit for hours. They call once, get voicemail, and give up. No qualification. No nurture. No second, third, or eighth touch. And often they bought a shared lead that four competitors also got.

Of course it closes near zero. You'd close a referral near zero too if you called once, three hours late, and never followed up.

A Facebook lead is cold. It's a homeowner who was scrolling, not searching. That lead can absolutely become an install — but only with two things the channel can't supply on its own: speed and a nurture system.

Responding within the first few minutes lifts qualification odds by about 21x versus waiting hours. A 5-10 minute delay already kills a chunk of your chances. The company that calls first, and keeps following up across an 8.9-month cycle, wins the cold lead. The company that calls once and quits blames Facebook.

If you're not sure why your paid leads close so much lower than your referrals, book a free audit — we'll look at your follow-up timing and show you where the leads go cold.

The two levers that move every source

Strip away the channel names and two things decide your close rate.

Lever one: ownership. An exclusive lead you own beats a shared lead someone resold. When the homeowner is only talking to you, there's no price race and no phone-bombing. Referrals close high partly because they're exclusive by nature — nobody else got that introduction. You can make paid leads exclusive too, by running your own ads instead of buying from an aggregator.

Lever two: speed and follow-up. The lead that gets called in two minutes and followed up eight times beats the lead that gets called once in three hours. Every time. Across every source. Solar's 8.9-month cycle means the sale almost never closes on touch one — the companies that win are the ones still showing up at touch six.

Most solar companies obsess over getting more leads. The leverage is in closing the leads they already paid for.

So what should a solar company actually do in 2026?

Build a system, not a lead-buying habit. In order:

1. Cut the aggregators first. Shared, resold, 30% junk. They close lowest and they poison your reps' time. Stop feeding them.
2. Build a referral engine. Referrals close at 37.5% and you're probably leaving them on the table — 90% customer satisfaction and 80% willingness to recommend, but most companies never ask. Ask, systematically, every install.
3. Own your paid pipeline. Run your own ads on Facebook, Google, and local search so every lead is exclusively yours. Then it's not a marketplace lead — it's an asset you control, and the cost per booked install drops as the campaign learns.
4. Fix follow-up before you spend another dollar on leads. Call within minutes. Build a nurture sequence that survives an 8.9-month cycle. This single fix moves every source up the table.

Do that, and the ranking changes. "Bad" Facebook becomes a steady source of exclusive leads. Your blended close rate climbs off the under-15% floor. And you stop paying premium prices for leads four competitors also bought.

We think about it in two phases: first fill the pipeline with exclusive leads you own, then get more from each homeowner — referrals, reviews, repeat work. An aggregator can't sell you phase two. There's no phase two when the lead was never yours.

Your 30-Second Audit

Three honest questions:

1. Do you know your close rate by source — or just one blended number that hides the truth?
2. How fast does a new paid lead actually get its first call — minutes, or hours?
3. After the first call, how many follow-up touches does a non-answering lead get before you give up?

If any answer made you uneasy, book a free audit. We'll pull your numbers, rank your sources by real close rate, and show you where the install-ready leads are leaking out — even if you never work with us.

The leads aren't the problem. The handling is.