- Published solar acquisition costs describe what the industry spends. Spending is an outcome, not a limit, and it cannot set your ceiling.
- Start instead from the gross margin dollars one install leaves you, then take your acquisition allowance as a share of that.
- Solar has almost no second job. A homeowner who buys an array does not buy another one, so the whole ceiling rests on a single transaction.
- The dealer fee on a financed system makes the invoice overstate your margin by a fifth or more. Ladder off the invoice and you overbid on every lead.
- Then use the published cost per watt as a cross-check. Run that check and the industry average turns out to consume nearly the entire margin on an average install at the illustrative 25 percent margin used here.
Quick answers: What is solar customer acquisition cost? · How much can I pay for a solar lead? · Why not just use the cost per watt? · Does the dealer fee change my ceiling? · What close rate should I use?
Key numbers A typical home system of 12 kilowatts at $2.60 per watt, or $31,135 before incentives, according to EnergySage, updated 30 June 2026. A solar loan dealer fee of 15 to 30 percent of the total loan amount, also published by EnergySage. US residential customer acquisition at 60 cents per watt in 2025 and a forecast 84 cents per watt for 2026, reported by Wood Mackenzie on 25 March 2026. An average system size of 7,150 watts direct current used in NREL analyses, stated in the US Department of Energy homeowner guide. A lead-to-close expectation of 3 to 7 percent, published by the lead seller SolarReviews and read on 13 August 2026.
Every page ranking for this term reports a cost per watt and stops. The few that go further multiply that cost up into a price you can pay for a lead, which sounds like the missing step and is actually the wrong direction. A cost per watt describes what other solar companies spend. Other companies have never been what sets your ceiling.
What a lead is worth to you is a function of the job behind it, the margin on that job, and how often you win. We ran that same method for HVAC in HVAC Customer Acquisition Cost: Max Payable Per Lead. This is the solar version, and solar bends the method in two places that HVAC does not.
Page one blends three populations into one impression
Keep them apart or the arithmetic underneath is worthless.
Wood Mackenzie published the figures page one repeats. In a piece dated 15 November 2023, the firm wrote that at 81 cents per watt, customer acquisition was the highest cost category in the US residential solar system cost stack. It also reported a record high of 85 cents per watt for the first half of 2023, which it called a 13 percent increase on the first half of 2022. Two figures, one source, one article: the 81 sits in an annual cost stack and the 85 is a half-year peak.
The same analyst has moved twice since. In a piece dated 25 March 2026, Wood Mackenzie put residential acquisition at 60 cents per watt in 2025 and forecast 84 cents per watt for 2026. Any page still quoting the 2023 figures as current is three years behind its own source.
The second number is a listicle figure. Amra and Elma states that residential solar firms spend about $10,000 per customer acquisition, attributes it to “Studies estimate”, and names no study, no system size and no year. There is nothing to check.
The third is a different product entirely. That same Wood Mackenzie piece reported community solar subscriber acquisition falling 12 percent in 2025 to an average of 69 dollars per kilowatt. Community solar sells a subscription, not an installed system, so a ceiling built on it belongs to someone else’s business.
The system size alone can move your answer by two thirds
Watch what happens when you try to turn cost per watt into dollars. The US Department of Energy homeowner guide states that NREL uses an average system size of 7,150 watts direct current. EnergySage says the typical home requires about 12 kilowatts.
Both are credible national figures. On our arithmetic they sit about 68 percent apart. So the same cost per watt yields two very different allowances depending on which “average system” you happened to pick up. That is the sound a method makes when it rests on the wrong foundation.
Start from what an install leaves you
A cash-sale shop and a finance-led shop are not in the same business, and neither is a shop selling batteries into an existing base. An industry average hands all three the same starting line, which is how a number that describes everybody ends up describing nobody.
Work it the other way. Take the gross margin dollars an install leaves you, multiply by the jobs a customer brings you, and you have what a customer is worth. Your acquisition allowance is a share of that. Choosing the share is a payback decision, and it is yours.
Here is where solar bends the method. In HVAC, a replacement customer comes back for maintenance and repair across an eighteen-year equipment life, and those later jobs are what rescue the ceiling. Solar has almost no second job. A homeowner who buys an array does not buy another one. A battery retrofit or a service agreement is a real second sale, but it is an attach rate you have to earn rather than a replacement cycle you can count on.
So the solar ceiling rests on one transaction. That makes getting the margin on that single transaction right more important in solar than in any trade with a service tail.
The dealer fee makes the solar invoice lie
Solar bends the method a second time, and this one is a trap.
EnergySage describes the dealer fee as the most common fee on a solar loan, an origination charge for administering the funds and carrying the risk, and puts it at 15 to 30 percent of the total loan amount. That money does not stay with the installer. It goes to the lender, and it is grossed up into the contract the homeowner signs.
Which means the invoice on a financed system is inflated by an amount that was never yours. Below, the same system sold two ways, with a dealer fee at 25 percent, inside the band EnergySage publishes.
| Line | Cash sale | Same system on a dealer-fee loan | Where the input comes from |
|---|---|---|---|
| System | 12 kilowatts | 12 kilowatts | The typical home requirement stated by EnergySage, updated 30 June 2026 |
| What the shop needs to collect | $31,135 | $31,135 | The average cost before incentives at $2.60 per watt, stated by EnergySage |
| Dealer fee to the lender | None | About $10,378 | Our arithmetic at 25 percent, inside the 15 to 30 percent band published by EnergySage |
| Contract the homeowner signs | $31,135 | About $41,513 | Our arithmetic on the two rows above |
| Cost of goods at 75 percent | About $23,351 | About $23,351 | Illustrative placeholder, substitute your own job costing |
| Gross margin dollars | About $7,784 | About $7,784 | Our arithmetic. Identical, because the fee was never margin |
Read the last two rows together. The contract grew by more than ten thousand dollars and the margin did not move by a cent.
A finance-led shop that runs its acquisition ladder off contract price therefore credits itself with money it handed to a lender. At a 25 percent fee it will believe it has about a third more to spend than it has, and it will carry that error into every lead it buys. This is the single most expensive mistake available in solar lead buying, and it is invisible on the profit and loss until volume makes it loud.
From margin dollars to maximum payable per lead
The rates below are illustrative placeholders. Substitute your own, because yours are the only ones that make the answer true. The close-rate column comes from a published band, and the band belongs to a lead seller.
SolarReviews, read on 13 August 2026, publishes a lead-to-close rate of 3 to 7 percent for a company with an efficient lead processing function. SolarReviews sells solar leads, so read that band as a vendor’s stated expectation for its own product, not as an independent benchmark.
| Step | Disciplined allowance | Aggressive allowance | Where the input comes from |
|---|---|---|---|
| 0. Gross margin dollars per install | About $7,784 | About $7,784 | Our arithmetic on the EnergySage system price at an illustrative 25 percent margin |
| 1. Jobs per customer | One | One | Solar has no replacement cycle. Count an attach only if you measure one |
| 2. Acquisition allowance | 25 percent, about $1,946 | 50 percent, about $3,892 | Your payback policy, not anyone’s benchmark |
| 3. Bought-lead share at 40 percent | About $778 | About $1,557 | Your own budget split between leads, brand, canvassing and referral |
| 4. Ceiling at a 3 percent close | About $23 per lead | About $47 per lead | Our arithmetic on the low end of the band published by SolarReviews |
| 5. Ceiling at a 5 percent close | About $39 per lead | About $78 per lead | Our arithmetic on the middle of that same band |
| 6. Ceiling at a 7 percent close | About $54 per lead | About $109 per lead | Our arithmetic on the top of that same band |
Now set real asking prices against it. According to SolarReviews, solar leads cost between $25 and $300. That same page says a screened exclusive opt-in web lead in a dense market such as San Diego sells for as much as $300, while a lead generated by a call center in India in the same market might sell for $25.
So on this ladder the cheap end clears almost everywhere, and the $300 exclusive clears nowhere, not even at the top of the close-rate band on the aggressive allowance. Your break-even sits somewhere between about $23 and about $109.
A price above your ceiling is not automatically a reason to walk. It is a reason to find out whether the seller’s screening lifts your close rate enough to move the ceiling up to meet it, because a pre-screened conversation that converts several times better than a raw form fill earns its higher price honestly. Ask what close rate its buyers actually see, then check the answer against the four screens in our solar lead qualification criteria.
Now use the published averages, as a cross-check
This is the step the method was built for, and it is the one that turns up something the whole results page misses.
Take Wood Mackenzie’s cost per watt and turn it into dollars on the same 12 kilowatt system, then set it against the margin that system leaves.
All three cost figures in the left column are Wood Mackenzie’s, from the 25 March 2026 piece and the 15 November 2023 piece. The two columns beside them are our arithmetic.
| Published acquisition cost | Per 12 kilowatt customer | Against an illustrative gross margin of about $7,784 |
|---|---|---|
| 60 cents per watt, the 2025 actual | About $7,200 | About 92 percent of the margin on the job |
| 84 cents per watt, the 2026 forecast | About $10,080 | About 129 percent of the margin on the job |
| 81 cents per watt, the 2023 cost stack | About $9,720 | About 125 percent of the margin on the job |
The industry average is not a target to grow into. On these figures it consumes essentially the entire gross margin on an average install, and the 2026 forecast consumes more than the job leaves. That is the arithmetic of a sector in a shakeout, and the sector is behaving accordingly. pv magazine reported on 18 March 2026 that Roth Capital Partners projects a 33 percent volume decline for US residential solar in 2026. Wood Mackenzie’s 25 March 2026 piece put the residential contraction at 19 percent after the tax credit sunset. Those are different measures published a week apart, so read them as two houses agreeing on direction and not on size.
Anyone who multiplies the herd’s cost per watt into a lead ceiling is handing you the spending pattern of a contracting industry and calling it a budget. Build the ceiling from margin first. Check it against the average second.
Published per-lead market ranges sit in our breakdown of solar lead prices by product, where four different price shapes hide under one label, plus aged solar leads priced per contact and appointment-set versus raw economics. Compare them to the ceiling you just built, not to anybody’s average.
What this ladder cannot tell you
It cannot tell you your margin, and margin dollars per install move the answer further than any figure on this page. The 25 percent used above is a placeholder standing in for your own job costing after panels, inverters, racking, labor, permitting and interconnection. It cannot tell you your close rate either, and that input alone moves the ceiling by more than double across the band SolarReviews publishes.
It does not price a subscription. Community solar and third-party-owned systems sell a stream rather than an installed system, and a stream needs its own arithmetic.
It also assumes every lead you buy is a real, reachable person. Duplicate, aged and bot-filled leads cut the effective close rate the whole ceiling hangs on.
Last, it deliberately says nothing about incentives, net metering or interconnection rules. Those move what a homeowner will pay and they change by jurisdiction and by year. They are not inputs to what a lead is worth to you, and a ceiling that depends on them is a ceiling with an expiry date.
Frequently Asked Questions
What is solar customer acquisition cost?
It is what a residential solar company spends to win one customer, usually expressed per watt of installed capacity. It covers every channel, not just bought leads. Wood Mackenzie put it at 60 cents per watt for 2025 and forecast 84 cents per watt for 2026. Treat it as a description of the herd, not as a limit for you.
How much can I pay for a solar lead?
Start from what an install leaves you, not from a published average. Take the gross margin dollars after equipment, labor, permitting and interconnection, allow a share of that as your acquisition budget, multiply by the share of that budget you spend with lead sellers, then multiply by your close rate. On the illustrative rates in this article that produces a ceiling of roughly $23 to $109 per lead.
Why not just use the cost per watt?
Because spending is an outcome rather than a limit, and in solar it is currently an alarming one. Turned into dollars on a typical system at the illustrative 25 percent margin used in this article, the industry average consumes nearly the whole gross margin on an average install, and the 2026 forecast consumes more than the job leaves. Use it to check your answer, never to start it.
Does the dealer fee change my ceiling?
It changes whether you calculate the ceiling correctly. EnergySage puts solar loan dealer fees at 15 to 30 percent of the total loan amount, and that money goes to the lender rather than to you. It sits inside the contract price but never inside your margin, so a ladder built on contract price will overstate what you can pay for a lead.
What close rate should I use?
Your own trailing rate, never a published band. Count it over enough leads that one extra sale does not move it, and over a period long enough to include your slow season. SolarReviews publishes a lead-to-close expectation of 3 to 7 percent, and that spread alone moves the ceiling by more than double.
Cite this data
Elevarus rebuilt the ladder on this page on 13 August 2026. Every underlying figure belongs to the publisher named beside it and links to the page we read it on. The arithmetic built on those figures is ours, and the margin and cost-of-goods rates are illustrative placeholders rather than measured industry values. Cite it as Elevarus, “Solar Customer Acquisition Cost: Max Payable Per Lead”, with a link to this page. We publish market ranges only, never our own rate card.
Bring us your margin and your close rate
If you know what an install leaves you after costs and what share of your leads you close, we can tell you whether a solar lead price pencils at your rates. Bring those two numbers, plus whether you sell cash or financed, and we will walk the ladder with you on the first call.
