During Italy's Superbonus 110% years I learned something marketing courses don't teach: people don't buy solar panels. They buy peace of mind, certainty and arithmetic. Ten years between Italy and Spain doing lead generation for the photovoltaic sector taught me what actually works and what's smoke. If you're about to spend budget on Google Ads or hire a marketing agency for your solar company, read this first.
This article mixes professional memories with technical advice. I started with photovoltaic marketing in Italy in 2010 during the Bonus 50% (the younger sibling of the 110% that would come later), built an operation generating thousands of qualified leads per month, moved to Spain in 2012, returned to solar marketing in 2017 when self-consumption started to take off, and ended up founding A Todo Sol in 2020 to apply everything I'd learned directly to end clients. Along the way I've seen too many solar companies burn absurd budgets on strategies that had no chance of working. Let me tell you why.
First lesson: the solar buyer isn't a technical buyer
When I started, I made the classic engineer mistake: I thought selling solar panels was a technical problem. I believed that if I explained the advantages of polysilicon efficiency, the conversion ratios of string inverters versus microinverters, and the kilowatt-hours per square metre achievable in the Mediterranean climate, people would understand and buy.
In six months of campaigns based on that logic, we generated thirty-five leads. Thirty-five. With an €18,000 budget. Catastrophic.
The first real lesson came when I sat down one afternoon with an actual client who'd filled out a form. A sixty-year-old man who owned a country house in Tuscany and had seen one of our ads. I asked him what had caught his attention. His answer: "the part that said I'd never have an electricity bill again."
I was expecting him to talk about polysilicon, efficiency, kilowatts. He talked about the absence of a problem. And then I understood something fundamental: the average solar client isn't buying a technical product. They're buying the solution to an emotional problem. And that emotional problem has specific names:
- "My bill keeps going up every month"
- "I don't trust the power companies"
- "I'm afraid I won't be able to afford electricity when I retire"
- "My neighbour installed it and tells me he doesn't pay anymore"
- "I want independence"
None of those problems gets solved with a kilowatt-hour chart. They get solved with simple arithmetic: "your current bill is X, with this installation it'll be Y, the annual saving is Z, total payback is N years, and after that it's pure profit." Period. If you can write those five lines honestly and verifiably, you've won the client. If you can't, no ad in the world will save you.
The Superbonus 110% and the volume marketing trap
The Italian Superbonus 110% was, in many ways, the Wild West of solar marketing. During 2020-2023, the Italian government allowed deducting up to 110% of the cost of a photovoltaic installation with battery if combined with other energy improvements. In theory, the client paid nothing. In practice, bureaucracy was suffocating and many companies were born opportunistically to ride the bonus and disappear when it ended.
During those years, Italian solar marketing became a race for volume: the more leads the better, and the goal wasn't closing happy clients but simply filling the pipeline before the bonus ran out. I was advising several installers at the time and I watched Google Ads and Facebook Ads budgets burn without any segmentation. Generic campaigns, boring creative, €80-150 per lead, conversion rates to signed contract below 5%.
The alternative I proposed — and that worked — was exactly the opposite: less volume, better quality. We designed a three-stage funnel:
- First stage: highly specific ads targeted at owners of single-family homes in regions where we knew the sun was enough and where regional bureaucracy worked. We filtered out flats, large buildings, and zones with structural shading.
- Second stage: an interactive online calculator where the user entered their monthly bill and roof orientation, and got an automatic pre-calculation of savings, recommended system and payback period. Anyone who didn't fill in the calculator was filtered out automatically. Anyone who did was, by definition, someone interested in the arithmetic.
- Third stage: a phone call made by a real commercial engineer, not a call centre. The goal of the call wasn't to sell but to decide whether the client was a good candidate. In 15 minutes we'd determine if there was a viable project. If not, we'd close the conversation honestly and recommend something else.
With that funnel, the cost per lead dropped from €80-150 to €18-30, the conversion rate from lead to signed contract jumped from 5% to 22%, and the post-installation satisfaction index became the best in the area. An operation with €30,000 monthly budget generated between 800 and 1,200 qualified leads and between 180 and 260 signed contracts. Those are real 2014-2015 numbers, when the Italian solar industry was saturated and nobody wanted another company doing the same thing as everyone else.
Arrival in Spain 2017: same pattern, different words
When I returned to solar marketing in Spain in 2017, the context was radically different. Spain had passed the "sun tax" in 2015, residential photovoltaics was nearly dead, and the only thing working was large-scale grid-injection installations. In 2018 the sun tax was repealed. In 2019 Royal Decree 244/2019 regulating self-consumption was passed. And between 2020 and 2021 the market exploded: favourable regulation, rising electricity prices, and falling panel and battery costs.
During that boom, Spanish solar marketing repeated exactly the same mistakes Italy had made ten years earlier. New companies popping up overnight, marketing agencies offering "hot leads" at absurd prices, Google Ads campaigns with cost per click above €8 on keywords like "solar panels", and disastrous conversion rates.
When I founded A Todo Sol in 2020, I applied the lessons from the Italian Superbonus. With some adaptations:
- Technical SEO instead of SEM. In Italy 2010-2015, Google Ads were cheap for the solar sector. In Spain 2020-2026, the same keywords cost 5-10 times more because all companies compete for them. The solution was to build a technically solid website with useful content and a really good interactive calculator, and work organic SEO for two years. The cost was time, not money.
- Real cases instead of stock photos. When we publish an installation, we publish the real installation, with the client's name (with permission), approximate address, kilowatts, cost, estimated savings and a drone photo of the roof. No "smiling man with fictional family". This generated measurable trust.
- Truth as strategy. When a potential client filled in the calculator and the result wasn't profitable — for instance, an urban flat with a small north-facing roof — our system told them directly: "this installation doesn't make sense for you, you'd spend €6,000 to save €200 a year and you wouldn't pay it back before 25 years". We lost short-term clients. We gained long-term reputation. That client came back two years later when they moved, or recommended a friend with a better roof.
The three mistakes 90% of solar companies make
After ten years doing this, and having watched dozens of competitors make the same mistakes, I can list them precisely:
Mistake 1: treating the product as a commodity
90% of solar companies sell "solar panels with batteries" as if it were a homogeneous product. Same panels, same inverters, same batteries, same promises. The client, who can't tell a Longi Himo 6 from a Jinko Tiger Neo, has no way to choose except on price. The result is a race to the bottom where margins compress and service quality drops.
The alternative is to differentiate by service, not by product. The panel is a commodity. The engineer who measures actual consumption before sizing, the in-house team with no subcontractors, the seven-day post-install service, the honest warranty — that's not a commodity. Building reputation around those points is far more profitable than dropping the price.
Mistake 2: believing Google Ads is marketing
Many new solar companies spend 90% of their marketing budget on Google Ads and Facebook Ads. Then they complain the cost per lead is unsustainable. The problem isn't Google — the problem is that they're buying traffic without having built anything else. No organic SEO, no documented case studies, no Trustpilot presence or real reviews, no useful content. The ad sends the client to a landing with no trust, the client hesitates, and the click is wasted.
Real solar marketing is 70% reputation, 20% organic SEO and useful content, and 10% advertising. Companies that invest in reputation first are the ones that can later afford to buy traffic and convert it. Those that do it backwards burn money without understanding why.
Mistake 3: impossible promises
The gravest and most common mistake. "Save 90% on your bill from day one". "Pay off your installation in 4 years". "Guaranteed 20,000 kWh per year". Round numbers that look great in the ad but rarely survive contact with reality. When the installation is done and the client discovers the real saving is 60% and the payback is 7 years, they don't just lose trust in that company — they lose trust in the whole sector. And they talk to their neighbours, and convince them not to install.
The only sustainable solar marketing long-term is the one that promises less than it'll deliver. If your calculation says 65% savings, promise 55% and deliver 65%. Positive surprise generates recommendations. Negative surprise generates enemies.
What a solar company should do in 2026
If I were advising a mid-sized solar company on its marketing strategy today, I'd give them five concrete pieces of advice:
- Build your own savings calculator. An interactive calculator where the user enters their consumption and sees estimated savings is, by far, the most powerful lead-generation tool in the sector. It not only captures contacts — it educates the user and filters out non-viable cases before they reach your salesperson. Investing €5,000 in a good calculator beats investing €20,000 in Google Ads.
- Publish real cases with real data. Every installation you complete should become a public case study: approximate location, system size, cost, real savings measured six months in, estimated payback. With client permission and with the truth up front. Twenty real cases on your site are worth more than a hundred Facebook ads.
- Invest in Trustpilot, not influencers. Solar clients trust other solar clients. A 4.8-star Trustpilot rating with 500 real reviews opens more doors than any social media campaign. The only way to get those 500 reviews is to have a good product and service, and actively ask for the rating after every installation.
- Avoid Google Ads the first two years. At least for competitive keywords. While you're building reputation and content, work on organic SEO and word-of-mouth. When you start ranking organically, then Google Ads can amplify what already works. But not before.
- Make post-sale your main marketing channel. A happy client brings, on average, between 2 and 4 new clients in the following two years. An unhappy client takes away, on average, between 5 and 10 potential clients. Investing in good post-installation service is the most profitable marketing there is in this sector.
Conclusion: real solar marketing isn't marketing, it's scalable honesty
After ten years doing this, the conclusion I've reached is simple and perhaps disappointing for growth-hacking fans: solar marketing that really works isn't marketing. It's scalable honesty. It's telling the client the truth even when the truth costs you the sale. It's publishing real savings, not rounded ones. It's installing without promising the impossible, delivering what was promised, and asking the client to rate you publicly only if they're satisfied.
Everything else — ads, calculators, SEO, case studies — are tools to scale that honesty. But without honesty, no tool works. I've seen companies burn six-figure budgets because they treated marketing as magic. And I've seen companies grow with €500-a-month budgets because they understood that a happy client is both the most expensive and the cheapest ad there is.
If you run a solar company and you're thinking about your 2026 marketing strategy, my advice is the same one I apply at A Todo Sol every day: build something good, tell people about it honestly, and let your clients do the rest. The sector rewards that far more than any brilliant campaign.