By Greg Allan, tradesman and creator of Data First Coaching
Should a solar installer put a battery on every quote?
Pushing a battery onto every quote because the market wants them is a sales decision, not a margin decision, and the two are often treated as the same thing. A solar installer who chases battery attachment rate without checking what that battery actually returns on the job can end up with more sales and less profit at the same time.
A panel and inverter install priced on its own usually sits inside a margin the installer understands well. The moment a battery line is added, the quote is carrying several products, each bought in at a different cost and marked up differently, plus the labour, roof access and the certificate and rebate paperwork that sits around the whole job. What the customer sees as one number on the quote is really several different margins blended into one, and it is the blend that decides whether the job was worth doing, not any single line.
Why does a solar business look busier but earn less once batteries are added?
A solar business can grow its revenue through battery attachment and still shrink its net profit, because markup on cost and margin on the sale price are not the same number, and most quoting is done on markup. A job that is marked up by a healthy looking percentage on cost can still return a much lower margin once it is actually sold, and that gap gets wider the more products are blended into the one quote.
For a solar installer this shows up fastest on a residential job with panels, an inverter and a battery quoted together. Each item was bought at a different cost, marked up by a different habit or supplier arrangement, and then the labour for the install, the roof access, the switchboard work and the paperwork for the network approval and certificates get added on top as if they were a flat cost. Overhead, the time spent on sales, site visits, warranty claims and service calls across the business, rarely gets attributed properly across every line. A quote that looks healthy at the point of sale can fail once that true cost mix is properly spread across panel, inverter, battery and labour.
What number actually tells you if a battery job is profitable?
The number that tells you the truth is the blended gross margin on that specific job, checked at the point of quoting, not the markup you applied or the revenue the job brought in. Revenue and attachment rate tell you how much you sold. Blended margin tells you what you kept.
Most solar installers can tell you their average margin across the business in general terms, but far fewer can tell you, job by job, what panels plus inverter plus battery plus labour actually returned once every cost was properly attributed. That is the number that separates a solar business growing its profit from one growing its revenue and quietly shrinking its profit, and it only comes from your own job data, not from an industry rule of thumb or a competitor's pricing.
How do AI agents change the way a solar installer quotes and tracks margin?
AI agents can take the quoting and tracking work that most solar installers do by hand or not at all, and do it the way the owner prices, every time, on every job. An agent is software that does a job the way you would do it yourself, using your prices, your wording and your rules, so the quote and the margin check happen the same way whether you are on site or in the office.
Picture a solar installer whose leads, quotes, job profit and incoming emails were spread across a phone, an inbox and a notebook, and who worked out cable sizing and voltage drop by hand after every site visit before a quote could even go out. A business management system built on that installer's own data can track every lead through the pipeline, work out cable sizing and voltage drop as part of the quote, turn emails into tasks instead of letting them sit unread, and report the profit on every job automatically once it is complete. Built from photos taken on site during the inspection, the quote fills itself in with panel, inverter, battery and labour lines already separated, so the blended margin is visible before the job is booked, not discovered after.
This is data first: the decision to chase batteries or not starts from what your own jobs have actually returned, not from a feeling that batteries are where the market is heading.
So should a solar installer still sell batteries?
Batteries are not the problem, and a solar business is not wrong to offer them. The problem is selling them without knowing what they return once labour, overhead and the full cost mix are properly spread across the job.
A solar installer who knows the blended margin on a panel-only job, a panel and battery job, and a commercial solar job with monitoring and an EV charger added can present good, better and best options to a customer with confidence, because each option is priced from what it actually returns, not from a markup habit. That conversation can end in a booked install date, built from discovery, instead of a quote left sitting in an inbox while the customer compares prices elsewhere.
How does Data First Coaching approach this?
Data First Coaching, created by Greg Allan, starts from the solar installer's own job data, read through the Trade Business Intelligence, rather than from an explanation of how the business runs. For a question like batteries, that means looking at blended margin job by job, not attachment rate or revenue, to find out whether growth in battery sales is actually growing profit or just growing turnover. From there the coaching works out where the real gap sits, in quoting, in cost attribution, or in how labour and overhead are spread across panel, inverter and battery lines. The how is worked through inside the Academy, with other members, because the Trade Business Intelligence is powered by every member who joins it, and the Academy is built for owners who are open minded, innovative and willing to share what they learn.
Looking for a business coach who starts from your numbers? Solar Business Coach or every answer for solar installers.

