Solar & battery
Solar Installer Revenue Calculator
Projects installer revenue, where the pipeline stages set the ceiling.
Result
Service lines rarely carry the same margin. Splitting them is the only way to see which part of the business is paying for the rest, which is frequently not the part that looks busiest.
Get a Free Business AuditHow the calculation works
Installs per period times average system value gives revenue, scaled annually with margin applied. The projection has to respect the pipeline, since revenue is recognised on installation and the path from sale to installation runs through design, permitting, interconnection and inspection, each of which takes time.
What moves the number
- Installs per period, limited by the narrowest pipeline stage.
- Average system value.
- Cancellation rate between sale and install.
- Seasonality and policy-driven demand shifts.
Where this one goes wrong
Projecting from contracts signed rather than from installs completed overstates revenue by the cancellation rate, which in solar is meaningful, and also ignores the lag through permitting that determines when the revenue actually lands. Model both. Average system value is worth tracking separately from install count, since a quarter with the same install count at smaller average size is a revenue decline that the count conceals.
Before you quote
- Project from expected installs, not contracts signed.
- Apply the cancellation rate between sale and install.
- Track average system value alongside install count.
Questions
About this calculator
Should revenue be projected from contracts signed?
No, because a meaningful share never install and the permitting lag determines when the revenue lands. Projecting from signed contracts overstates both the amount and the timing, which is how installers overcommit on hiring.
What limits install volume?
The narrowest pipeline stage, which is frequently permitting or interconnection rather than crew capacity. Measuring each stage is what identifies the real constraint, and adding capacity elsewhere produces nothing.
Why track average system size?
Because a quarter with the same install count at a smaller average size is a revenue decline the count conceals. The mix shifts without anyone deciding it, and watching both figures catches it earlier than the revenue report does.
The formula
revenue = jobs x average value; gross profit = revenue x margin
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How to use this calculator
- Repair jobs per month. Enter your own figure; the page starts at 28.
- Average value ($). Enter your own figure; the page starts at $21,500.
- Gross margin on this work (%). Enter your own figure; the page starts at 30%.
- Share of total revenue (%). Used to show what the whole business turns over.
The result updates as you type, so you can try a figure, see what it does to repair revenue per month, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Repair jobs per month | 28 |
| Average value | $21,500 |
| Gross margin on this work | 30% |
| Share of total revenue | 40% |
What comes out
| Result | Value |
|---|---|
| Repair revenue per month main result | $602,000 |
| Per year | $7,224,000 |
| Gross profit per year | $2,167,200 |
| Implied total business revenue | $18,060,000 |
The repair line brings in $7,224,000 a year and earns $2,167,200 of gross profit on it.
How sensitive the answer is
Holding everything else steady and changing only average value, this is what happens to repair revenue per month. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Average value ($) | Repair revenue per month |
|---|---|
| $10,750 | $301,000 |
| $16,125 | $451,500 |
| $21,500 example above | $602,000 |
| $32,250 | $903,000 |
| $43,000 | $1,204,000 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Repair jobs per month
- A number, between 0 and 10000, starting at 28.
- Average value ($)
- A money amount, starting at $21,500.
- Gross margin on this work (%)
- A percentage, between 0 and 95, starting at 30%.
- Share of total revenue (%)
- Used to show what the whole business turns over.
What the results tell you
| Result | What it is |
|---|---|
| Repair revenue per month | The headline result. A money figure. |
| Per year | A money figure. |
| Gross profit per year | A money figure. |
| Implied total business revenue | A money figure. |
A design still needs a site visit
Output and sizing figures use the assumptions you enter, not measured irradiance, shading or roof orientation at your address. Real production depends on all three, plus inverter behaviour and local interconnection rules.
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.