By Greg Allan, tradesman and creator of Data First Coaching
Why does a fully booked solar installer still watch margin disappear?
A solar installer can have the diary full for weeks and still find the bank balance does not match the quoted gross profit on those jobs. That is because being busy and being profitable are two different measurements, and most solar businesses only watch the first one. Install bookings tell the owner demand is strong. They say nothing about what each job actually cost in real hours once it was won, quoted, installed and signed off.
Solar work is unusual among trades because so much of it runs through one person: the accredited installer who has to be on site for the technical parts of the job and whose sign off the business depends on. When that person's week fills with things other than installing, the business feels it in margin long before it shows up anywhere an owner would normally look.
What hours actually eat into a solar install's profit?
The hours that quietly turn a healthy quoted margin into a thin one are the ones that never make it onto an invoice: driving between sites, chasing a backordered inverter from the wholesaler, sitting at a desk working through a technical quote for a commercial job, or heading back out for a warranty callout that was not priced into the original job. None of this looks like a problem in the moment. It looks like a normal week.
Picture a solar installer whose accredited tradesperson was doing exactly this: spending real chunks of the week behind a screen working up technical quotes instead of being out on roofs, while the rest of the crew carried on as normal. The team's overall numbers still looked fine on paper. It was only once the business started tracking utilisation for that individual, rather than just the crew as a whole, that the gap showed up. Low weeks for that one person led to a direct conversation and, where it made sense, that person went back on the road instead of staying at a desk.
What is the one number that shows the real story each week?
The number that tells a solar installer the truth is not install count or quoted gross profit margin on its own. It is how much of the accredited installer's paid week was actually billable: time spent on the roof and the technical parts of the job, against the total hours they were paid for, travel included. That ratio, tracked week on week rather than once a quarter, is what shows whether a quoted margin is holding or quietly leaking away.
This is a data first way of looking at the business. Instead of starting from a feeling that things are busy or a memory of how last quarter went, the owner starts from this week's actual hours and lets the number say what it says. A solar installer whose accredited tradesperson is running at a strong ratio is protecting margin. One where that ratio is sliding is watching a problem build, even while the diary looks healthy.
How do AI agents change this for a solar installer?
AI agents can take on the non-billable work that eats into the accredited installer's week, so more of their paid hours go back into actual installs. An AI agent is software that does a job the way the owner would do it, using their own prices, their own wording and their own rules, rather than a generic template.
For a solar installer, that can mean an agent handling the first pass on a technical quote using the owner's own pricing and product choices, chasing a wholesaler for stock status, or working through the paperwork around government rebate certificates and network connection approvals, so the accredited installer is not the one stuck doing it between jobs. The point is not to remove the person. It is to put the right information and the right step in front of them at the right time, so their week goes back to the work only they can do.
Should a solar installer still track installs, sales and callouts?
Yes, but as supporting numbers, not the main ones. Install volume, enquiry to booked job conversion and callout frequency are all useful for a solar installer to watch, because they show demand and service load. They just do not, on their own, show whether a job that looked profitable when quoted actually was once every hour was counted.
Some off the shelf tools and spreadsheets suit a solar business well enough for tracking these supporting numbers. The owner's own data is what shows which ones earn their place and which are just adding noise, rather than assuming every tool built for every trade at once fits a solar installer's particular mix of sales-led enquiries, accreditation requirements and roof safety obligations.
How does Data First Coaching approach this?
Data First Coaching starts from the solar installer's own job and finance data through the Trade Business Intelligence, not from a conversation about how busy things feel. For this question, that means looking first at where the accredited installer's paid hours actually went last week, and working back from there to find where the gap between quoted and real margin begins. Greg Allan has put it plainly from his own experience running a trade business: “I'm the only accredited solar installer in my business.” The how, the exact numbers to build and the systems to run them, is worked through inside the Academy, among members who are open minded, innovative and willing to share, because the Trade Business Intelligence is powered by every member.
Looking for a business coach who starts from your numbers? Solar Business Coach or every answer for solar installers.
