SEO vs Google Ads for Solar Companies: Which Delivers Better ROI?

This is not a theoretical comparison. We manage both SEO and Google Ads campaigns for solar companies across the UK. We track every call, every form submission, and every installation that results from each channel. Here is what the data actually shows.

The cost comparison is stark. Google Ads for solar keywords in the UK currently costs £15-50 per click depending on the keyword and location. "Solar panel installers near me" in competitive areas like London or Manchester can exceed £40 per click. With a typical 5% landing page conversion rate, that translates to £300-1,000 per lead from Google Ads.

SEO leads, once rankings are established, cost £5-15 each at scale. The difference is that SEO requires upfront investment (typically £1,500-3,500 per month for 6-12 months) before the leads start flowing consistently. But once they do, the cost per lead continues to decrease over time as your authority grows.

Lead quality differs significantly between the two channels. Google Ads leads tend to be more price-sensitive -- they clicked on an ad, and they know it. They are often comparison shopping across multiple companies. Our data shows Google Ads leads for solar typically have a 15-25% close rate.

SEO leads, by contrast, found you through organic search results. They perceive your company as the authority that Google chose to show them, not the company that paid to appear. Our data shows organic search leads for solar typically have a 30-45% close rate -- nearly double the conversion rate of paid leads.

Speed versus sustainability. Google Ads wins on speed. You can have ads running and leads coming in within 48 hours. This is valuable for new companies that need immediate cash flow or seasonal businesses preparing for summer demand surges.

SEO wins on sustainability. Once you rank #1 for "solar panel installers [your area]," you keep receiving those leads month after month without ongoing per-click costs. B Solar Energy has been receiving 80+ calls per month for over a year now from rankings we established in their first 6 months.

The compound effect of SEO is the real differentiator. Each piece of content you create, each location page you build, each review you collect makes every future effort more effective. After 12 months of SEO, you are not starting from zero -- you are building on a foundation of authority that makes ranking for new keywords faster and easier.

Google Ads has no compound effect. The day you stop paying, the leads stop. Every month is a fresh expense with no lasting benefit. We have seen solar companies spend £100,000+ on Google Ads over 2-3 years with nothing to show for it the day they stop.

Our recommendation for most solar companies. Start SEO immediately. It takes time to build, so the sooner you start, the sooner you benefit from the compound returns. If you need leads in the short term while SEO builds, use a modest Google Ads budget (£1,000-2,000 per month) targeting your most profitable keywords.

As your SEO rankings strengthen and organic leads increase, gradually reduce your Google Ads spend. Most of our solar clients reach the point where they can turn off Google Ads entirely within 6-9 months, because their organic traffic generates more leads than they can handle.

The bottom line: Google Ads rents you visibility. SEO builds you an asset. For solar companies planning to be in business for the next 5-10+ years, the maths overwhelmingly favours SEO. See the real ROI data from our solar clients or explore our solar SEO services.