A solar site assessment is not a quick service call. A thorough assessment takes 60 to 90 minutes: roof inspection for structural integrity, load-bearing capacity, and available space; shading analysis at different times of day; electrical panel evaluation for capacity and upgrade requirements; attic inspection for roof decking condition; and a conversation about system size, financing options, and timeline. That is professional time with real value. When a homeowner does not show up, that time is gone completely.
The specific challenge in solar is that assessment no-shows are structurally common. They are not caused by forgetful homeowners. They are caused by homeowners who booked simultaneously with multiple installers and made their decision before they had seen everyone. A deposit does not prevent multi-quoting. It ensures that your assessment gets the homeowner's presence and attention rather than a polite cancellation email after they have already signed with a competitor.
The multi-quote structure of residential solar purchasing
A homeowner evaluating residential solar is making one of the larger discretionary financial decisions of their life. The right number of quotes for a $25,000 purchase is more than one. Homeowners who get multiple quotes make better decisions, and the solar industry has generally encouraged this by offering free assessments as a competitive practice.
The problem this creates for installers is that multi-quoting without commitment produces assessment no-shows at high rates. A homeowner who has four assessments scheduled in one week will sometimes narrow their list to two companies before all four visits happen, cancel the other two, and occasionally forget to cancel at all. The installers who get cancelled with notice lose assessment time. The installers who get ghosted lose more.
A $150 assessment deposit does not eliminate multi-quoting. It creates commitment to showing up for your specific assessment and giving your company a fair hearing. It also creates an incentive to cancel properly if the homeowner decides early: the homeowner gets their $150 back with adequate notice, so they call. That call gives you back the slot.
The cost of a solar assessment no-show
Estimating the cost of a solar assessment no-show requires accounting for the full time investment, not just the drive time. An experienced solar assessor who drives 30 minutes each way and spends 90 minutes on site has invested 2.5 hours in a single assessment. At a blended professional rate of $75 per hour, that is $187.50 in direct time cost per no-show. Add fuel, vehicle cost, and the proposal work that typically follows a completed assessment and the total runs $250 to $350 per wasted visit.
For a small solar installation company running 5 to 8 assessments per week during the spring selling season, a 20 percent no-show rate without deposits means 1 to 2 wasted visits per week. At $300 per wasted visit, that is $300 to $600 per week in unrecoverable assessment costs during your highest-demand period.
Research across service industries shows that deposits reduce no-show rates by 60 to 80 percent. (Source: Curogram, 2023.) For a solar installer running 8 assessments per week with a 20 percent no-show rate, deposits typically reduce wasted visits from 1 to 2 per week to less than 1 per week. That savings pays for the booking software and then some.
Framing the assessment deposit for maximum acceptance
The framing of a solar assessment deposit matters more than the amount. Two versions of the same $150 deposit produce different responses from homeowners.
Version one: "We charge a $150 assessment fee." Most homeowners who have been getting free solar assessments from competitors resist this immediately. They have been conditioned by the industry to expect free assessments.
Version two: "Our assessments are reserved with a $150 deposit that applies to your installation. If you decide not to proceed after seeing the proposal, the deposit is retained as a site assessment fee. Most homeowners who see our proposal proceed." The second framing positions the deposit as a down payment on a purchase the homeowner is likely to make, references the expected outcome positively, and sets a clear refund condition. Homeowners who are serious solar buyers respond well to this framing because it sounds like a business with confidence in its product.
Requiring all decision-makers at the assessment
Solar sales cycles extend when the homeowner who attended the assessment is not the sole decision-maker. A husband who attends the assessment and brings a proposal home to review with his wife, who then has questions that require a second call or visit, adds days or weeks to the cycle. A homeowner who gets excited at the assessment but needs partner approval before signing adds another approval loop that competing installers can enter during the delay.
Require all household decision-makers at the site assessment as a condition of booking. State this on the booking page: "All adults who will be involved in the purchase decision must be present for the site assessment." Include it in both SMS reminders. Homeowners who know this requirement arrange their schedules accordingly. The assessment that includes everyone who needs to say yes produces a faster decision and a higher close rate.
Enforcement through GrabMySlot
Deposits collected through GrabMySlot at the time of booking enforce your cancellation window automatically. Homeowners who cancel inside the 48-hour window lose the deposit without any action from you. For homeowners who simply do not show up, the deposit is retained. You receive a notification either way and can open the slot.
GrabMySlot is free to start. You pay 3 percent only when you collect a deposit. Set up your booking page in under five minutes at grabmyslot.com.
