A utility-scale solar farm in Australia currently costs between $1 million and $1.5 million per megawatt (MW) of installed capacity, with smaller or grid-constrained projects pushing towards $2–$3 million per MW. For a 100 MW project, that puts the total capital cost in the range of $100–150 million before land and financing.
But the headline “per MW” figure hides a lot. What you actually pay depends on where the site sits, how far it is from a viable grid connection, how big the build is, and how long approvals take. This guide breaks the cost down component by component, shows what a farm costs at each size, and explains why, after years of falling prices, costs have started to plateau in current market conditions.
We install commercial and ground-mount solar across New South Wales and Queensland, so the numbers here reflect what we see on real Australian projects, not overseas averages.
How much does a solar farm cost in Australia?
The working range for a utility-scale build is $1M–$1.5M per MW. Community-scale and smaller commercial projects (roughly 100 kW to 5 MW) sit at the higher end per MW, because fixed development, engineering and grid-connection costs can’t be spread across as much capacity.
A point worth flagging, because most articles still get it wrong: solar farm costs are no longer falling in a straight line. Solar module prices have kept dropping on the back of global oversupply, but balance-of-system costs (grid connection, transformers, labour, land and approvals) have risen enough to offset those savings. Australian Government analysis published in current market updates describes exactly this divergence: the panels are cheaper, the projects are not. Plan your budget around today’s rates, not a hoped-for future decline.
| Farm type | Typical size | Indicative cost per MW |
|---|---|---|
| Community / small commercial | 100 kW – 5 MW | $1.3M – $2M+ |
| Mid-scale | 5 – 50 MW | $1.1M – $1.5M |
| Utility-scale | 50 MW+ | $1M – $1.4M |
Figures are indicative capital costs and exclude land purchase and financing. Every site is different. A firm number needs a site-specific feasibility estimate.
Solar farm cost by size
The quickest way to sanity-check a budget is to scale the per-MW rate. At $1–1.5M per MW:
| Capacity | Indicative build cost | Roughly powers |
|---|---|---|
| 1 MW | $1M – $1.5M | ~200–350 homes |
| 5 MW | $5M – $7.5M | ~1,000–1,700 homes |
| 10 MW | $10M – $15M | ~2,000–3,500 homes |
| 50 MW | $50M – $70M | ~15,000+ homes |
| 100 MW | $100M – $150M | ~30,000+ homes |
Remember the economies-of-scale rule works in reverse for small builds: a 1 MW project rarely costs exactly one-hundredth of a 100 MW project, because you still need engineering, a grid connection and approvals no matter how small the array.
What’s included in the cost: a component breakdown
Panels are the part everyone pictures, but they’re well under half the bill. Indicative shares of total capital cost:
| Component | Share of capital cost | What it covers |
|---|---|---|
| Solar modules (panels) | ~30–40% | The PV panels themselves |
| Inverters | ~8–12% | Converting DC to grid-ready AC |
| Mounting, racking & balance-of-system | ~15–20% | Frames, cabling, combiner boxes, trackers |
| Grid connection & infrastructure | ~10–20% | Transformers, substation works, transmission lines |
| Labour & installation | ~10–15% | Civil works, assembly, electrical |
| Development, engineering & approvals | ~5–10% | Feasibility, design, DA/planning, grid studies |
| Land | Variable | Purchase or lease (often leased) |
The two line items that most often blow a budget are grid connection and approvals, both covered below.
What makes a solar farm cost more
Distance to a viable grid connection. This is the single biggest swing factor. A site metres from an existing substation with spare capacity is a completely different proposition to one that needs kilometres of new transmission line and a substation upgrade. In parts of regional NSW and Queensland, grid congestion means even a well-priced build can stall on connection costs and timelines.
Scale. Larger farms secure better panel pricing and spread fixed costs, lowering the per-MW rate. Smaller community projects pay a premium per MW.
Site and terrain. Flat, cleared, well-drained land is cheapest to build on. Sloping, vegetated or flood-prone sites add civil works. Queensland’s cyclone-rated regions can require stronger mounting structures, which lifts the racking cost.
Approvals and planning. Development Application timelines, environmental assessments and community consultation all carry cost and, more importantly, time. Delays are expensive when finance is already committed.
Land tenure. Leasing land (common in Australia) keeps upfront capital down and gives regional landowners a steady income; buying adds a large one-off cost but removes an ongoing liability.
Commercial and ground-mount solar: a lower-cost entry point
You don’t need a 100 MW utility project to benefit from ground-mount solar. For most Australian businesses, the sensible starting point is a behind-the-meter commercial system, sized to offset your own consumption rather than sell into the wholesale grid.
A ground-mount array on spare land next to a warehouse, factory or business premises avoids the roof-loading limits of a rooftop system and can be scaled well beyond what a roof allows. Panel choice matters at this scale, so it’s worth checking which panel types suit commercial use before you commit. Paired with battery storage, the system can shift more of your generation into the hours you actually use power, improving the payback further.
This is the space where we do most of our commercial solar work across NSW and QLD, and it suits a wide range of high-consumption Sydney industries. The ROI conversation is far simpler than a utility farm: no wholesale market exposure, no large-scale grid connection, and a clear offset against a bill you already pay.
From 1 October 2026 this band also gets materially cheaper. The expanded commercial solar rebate covers systems up to 1 MW, up from the old 100 kW ceiling, as an upfront discount worth around 20% of the installed cost. For anything in the 100 kW to 1 MW range, that single change often does more for the business case than any other factor on this page.
How to start a solar farm in Australia
The path from idea to generation, in short:
- Secure a site with good solar exposure, viable land, and, critically, realistic proximity to grid capacity.
- Commission a feasibility study covering yield, grid-connection cost and timeline, and a concept-stage cost estimate.
- Lock in land tenure (lease or purchase) and confirm zoning.
- Obtain approvals: Development Application, environmental and planning sign-offs.
- Complete grid-connection studies and agreements with the relevant network operator.
- Finalise engineering and procurement, then build.
- Register for Large-scale Generation Certificates (see incentives below) to add a revenue stream.
The order matters: confirm grid feasibility before spending heavily on design. More Australian projects stall on connection than on any other single factor.
Government incentives that improve the return
Australia’s renewable-energy framework materially improves solar farm economics:
Large-scale Generation Certificates (LGCs). Under the Large-scale Renewable Energy Target, accredited large-scale generators earn one LGC for every megawatt-hour of eligible electricity produced. These are tradeable and provide an ongoing revenue stream on top of electricity sales. The scheme runs to the end of 2030.
The Renewable Energy Target (RET). The RET sets an annual target of an additional 33,000 GWh of large-scale renewable generation each year through to 2030, the policy backbone that underpins LGC demand.
Feed-in and power purchase arrangements. Farms can sell generation into the grid or lock in revenue through a Power Purchase Agreement with a buyer.
Small-scale certificates (STCs). From 1 October 2026, the SRES covers commercial systems up to 1 MW (previously capped at 100 kW), paid as an upfront discount of around 20% off the installed cost. Only systems above 1 MW now sit under the large-scale LGC framework. Other federal, state and territory programs may apply on top; our guide to Australian solar rebates covers current eligibility, which changes regularly, so check before budgeting.
Solar farms: pros and cons at a glance
| Advantages | Trade-offs |
|---|---|
| Renewable, with Australia’s world-class solar irradiance | High upfront capital |
| Cuts carbon emissions and displaces fossil fuels | Needs significant land |
| Low running costs (no fuel, few moving parts) | Intermittent: daylight only, weather-dependent |
| Creates jobs and gives landowners lease income | Grid connection can be complex and costly |
| Highly scalable, from community to utility | Battery storage adds cost if firming is required |
Ready to cost your project?
Whether you’re a business weighing a commercial rooftop system or a ground-mount array on spare land, the first step is a site-specific feasibility estimate, not a generic per-MW guess. Greenlight Solar designs and installs commercial and ground-mount solar across NSW and QLD.
Book a commercial solar feasibility consultation →
Frequently asked questions
How much does it cost to build a solar farm in Australia?
Currently around $1–1.5 million per MW for utility-scale, so a 10 MW farm costs roughly $10–15 million and a 100 MW farm around $100–150 million, excluding land and financing. Smaller projects cost more per MW.
What is the cost per MW for a solar installation?
For utility-scale ground-mount, budget $1–1.5 million per MW as a working figure, rising towards $2–3 million per MW for small or grid-constrained projects.
Are solar farm costs still falling?
Not straightforwardly. Panel prices continue to fall, but balance-of-system costs (grid connection, labour, land and approvals) have risen enough to hold overall project costs roughly flat in current conditions.
How much land does a solar farm need?
As a rough guide, roughly 2–4 hectares per MW, depending on panel type, spacing and whether single-axis trackers are used.
Is ground-mount solar worth it for a business?
For many commercial sites, a behind-the-meter ground-mount system that offsets your own grid consumption pays back faster and carries far less complexity than a grid-export utility farm. Feasibility depends on your energy use, available land and site.
How do I start a solar farm?
Secure a site with grid access, run a feasibility study, lock in land tenure, obtain approvals, complete grid-connection agreements, then build and register for LGCs. Confirm grid feasibility before committing to design.
