On Earth Day, with the case for renewables stronger than ever, it is worth looking at a problem that quietly catches the businesses installing them: a solar and battery installer can have a full pipeline, strong demand and a healthy order book, and still run out of cash. The demand is real and the work is profitable. The trouble is in the timing of the money, and growth makes that timing worse rather than better.
This is the paradox that catches fast-growing installers. The busier you get, the more cash the business consumes before the revenue lands, because every job ties up money at the front end and only releases it at the back. Win more jobs and you tie up more cash at once. A quiet quarter can feel financially easier than a booming one, which is a deeply counterintuitive thing for an owner to experience.
Where the cash gets trapped in an install
Walk through the cash on a single job. You take a deposit, which helps, but it rarely covers the equipment cost. The panels, inverter and battery have to be bought and often paid for before installation, and on battery jobs especially the equipment cost is substantial. Your team’s time is paid as the work happens. Then the balance is invoiced on completion, and depending on the customer and any rebate or instalment arrangement, the final payment can land well after the job is done.
So the working capital cycle on each job runs negative for a stretch: cash out for equipment and labour, then a wait, then cash in. On one job it is manageable. Across a growing pipeline of jobs all sitting at different points in that cycle, the combined cash gap widens fast. The deposit timing helps at the start, but the gap between paying for equipment and collecting the final balance is where the squeeze lives, and it scales directly with how many jobs you are running at once.
Rebates and instalment arrangements add a layer worth understanding, because they change who pays and when. A portion of the job value may come through a scheme or a financed arrangement rather than directly from the customer at completion, and that portion can land on a slower and less predictable timetable than a straightforward invoice. The work is done, the equipment is paid for, and a slice of the money is waiting on a process outside your control. Knowing exactly which part of each job’s value arrives quickly and which part arrives slowly is the difference between a cash forecast you can rely on and one that keeps surprising you.
Funding the pipeline deliberately
The installers who grow without lurching from one tight week to the next are not the ones with the fattest installation margin. They are the ones who fund the pipeline deliberately rather than discovering the gap when several equipment invoices and a payroll land in the same week. That starts with seeing the combined cash cycle across all active jobs, not job by job, so the squeeze is visible weeks ahead.
From there the levers are practical. Aligning deposit terms more closely to equipment outlay, negotiating supplier terms on the equipment that is consuming the cash, tightening the time between completion and final invoice, and matching the pace of new work to the cash the business can actually carry. A Working Capital Unlock is built to map exactly where cash is trapped across deposits, equipment, work in progress and supplier terms, and to put a prioritised plan against releasing it.
Of these, the deposit and the supplier terms are usually the two with the most room to move. A deposit set to cover the equipment outlay rather than a token percentage changes the shape of every job’s cash cycle, because the largest upfront cost is no longer funded entirely from the business’s own reserves. Supplier terms on the panels and batteries do the same from the other side, since even a modest extension on the equipment that consumes most of the cash narrows the gap the business has to bridge. Neither requires winning fewer jobs. Both simply align the timing of money out with the timing of money in.
Growth that the cash can carry
None of this means slowing down. Strong demand for solar and battery is a genuine opportunity, and the answer is not to turn work away. It is to grow at a pace the cash can carry, with the funding for the pipeline arranged before it is needed rather than scrambled for once it is. An installer who knows their working capital cycle can say yes to more work with confidence, because they know what it will cost in cash and have planned for it.
For renewable installers across Queensland, where demand and sunshine are both in good supply, the constraint on growth is rarely the market. It is the working capital. There is more on managing that timing in our guide to cash flow discipline, and the installers who build something lasting are the ones who treat the cash cycle as seriously as the install schedule.
Frequently asked questions
Why does my solar installation business run out of cash while growing?
Because each job ties up cash at the front end and releases it only at the back. You pay for equipment and labour before the balance is collected on completion, so the working capital cycle runs negative for a stretch. Win more jobs and you tie up more cash at once, which is why a busy quarter can feel tighter than a quiet one. A Working Capital Unlock maps exactly where that cash is trapped.
How does the working capital cycle affect renewable energy installers?
Each install runs cash out for equipment and labour, then a wait, then cash in on final payment. On one job that is manageable; across a growing pipeline of jobs sitting at different points in the cycle, the combined cash gap widens fast and scales with how many jobs you run at once. The deposit helps at the start, but the gap between paying for equipment and collecting the balance is where the squeeze lives.
How can solar installers fund a growing pipeline of jobs?
Deliberately, not reactively. Start by seeing the combined cash cycle across all active jobs rather than job by job, so the squeeze is visible weeks ahead. Then pull practical levers: align deposit terms to equipment outlay, negotiate supplier terms on the equipment consuming the cash, tighten the time from completion to invoice, and match the pace of new work to the cash the business can carry. Our cash flow discipline guide covers the approach.
Why does battery installation tie up so much cash?
Because the equipment cost is substantial and usually has to be bought, and often paid for, before installation. On battery jobs especially, the deposit rarely covers the equipment outlay, so the business funds the gap between buying the hardware and collecting the final balance. The larger the battery component and the longer the wait for final payment, the more cash each job consumes before it returns anything.
Should renewable installers slow growth to protect cash flow?
Not necessarily slow down, but grow at a pace the cash can carry. Strong demand for solar and battery is a real opportunity, and turning work away is rarely the answer. The better move is to arrange the funding for the pipeline before it is needed and to know what each new job costs in cash. An installer who understands their working capital cycle can say yes to more work with confidence rather than scrambling.
How do installers in Queensland manage cash with strong solar demand?
The constraint on growth is rarely the market in Queensland, where demand and sunshine are both plentiful. It is the working capital. Installers who grow steadily treat the cash cycle as seriously as the install schedule, mapping where cash is trapped across deposits, equipment and final invoices, and funding the pipeline ahead of need. That lets them ride strong demand without the boom quietly draining the bank account.
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