What a pallet of panels really costs your margins
Bulk-bought stock used to land its whole cost on one unlucky project. Payaca's Stock Locations, now live on every account, hold it at real weighted average cost until a job actually uses it.
How Payaca's live profit forecast in the proposal builder helps clean tech installers stop mispriced jobs from going out the door.
Matt Franklin
There is a pattern in how growing installers price complex jobs. The quote goes out based on experience and a rough materials count. It looks profitable. The job runs, the invoice gets paid, and then - somewhere between the PO, the labour hours, and the unexpected extras - the margin you expected is not there.
This is not carelessness. It is what happens when your quoting tool shows you a total but not a forecast.
A solar installation with panels, inverters, a battery, mounting systems, cabling, and DC isolators already has a dozen material lines. Add an OpenSolar design sync and a few ad-hoc items your sales team added by hand, and the quote has complexity that is hard to track in your head.
Heat pump jobs are similar. A cylinder package with labour tiers, a commissioning line, ancillaries, and materials pulled from Heatpunk can be accurate to the penny on paper and still produce a margin surprise when the job closes - because nobody added up every cost against every sell price in one place before the proposal went out.
The instinct is to rebuild it in a spreadsheet. Experienced estimators do this before sending anything that matters. But it takes time, it gets skipped under pressure, and it breaks down entirely when a team of five people are quoting simultaneously.
The profit forecast inside Payaca's proposal builder updates in real time as you add and adjust line items. Every material is included - items your team added from the catalogue, lines synced in from a design tool, and anything entered manually on the job.
It shows a predicted margin figure, not an actuals report. That distinction matters. You are seeing what the job is expected to produce based on the costs in the system at the time of quoting - which is exactly the number you need before the proposal leaves your desk.
The forecast counts quantity reductions as well as additions. If a design sync changes the panel count down, the margin updates. If you remove a battery package, the margin updates. You are not looking at a stale number from when you first opened the job.
At five installs a month, your most experienced person reviews every quote before it goes out. That human check catches mispriced jobs.
At 30 or 40 installs a month, that does not scale. Quotes go out from multiple people with varying levels of experience. The jobs that look profitable on the quote but are not are hard to identify until the invoice is paid and the margin has been calculated after the fact.
A live forecast shifts the check from post-job to pre-send. The number is visible while the quote is still editable. A job that is under-priced on materials gets caught before it becomes a customer commitment.
For a business doing 35 installs a month at an average job value of £12,000, a 2% improvement in quote accuracy across the board is real money. Not a rounding error.
If you are already using proposals in Payaca, the profit forecast is live in your proposal builder now. Open any proposal in draft and look for the margin figure while you are building the line items.
If your team uses design integrations - EasyPV, Heatpunk, or OpenSolar - the synced materials from those designs are included in the forecast automatically. The number you see reflects the full job, not just the lines your team added by hand.
Book a demo to see how the proposal builder fits your current quoting workflow.
See how Payaca helps clean tech installers save time and grow their business.
Book a demoBulk-bought stock used to land its whole cost on one unlucky project. Payaca's Stock Locations, now live on every account, hold it at real weighted average cost until a job actually uses it.
US solar installers don't have one national permitting clock - they have as many as they have AHJs. Here's what that variance actually costs a growing install business, backed by NREL data.
Real income numbers for MCS-certified heat pump installer businesses in 2026. Day rates, annual turnover, BUS grant impact, and what a 5-person team can realistically earn.