Commercial Solar

Solar Carports: Turning Car Parks into Generation

Guide · Commercial solar & battery · ~5 min read

A car park is dead space that already gets full sun most of the day. A solar carport puts that space to work, generating power for your site while giving staff, customers and fleet vehicles somewhere shaded to park.

What a solar carport actually is

A solar carport is a purpose-built steel structure over your car park, with solar panels forming the roof. Unlike a rooftop system that sits on an existing building, the carport is engineered from the ground up to carry the array and shelter the vehicles underneath.

That means it does two jobs at once: it generates electricity for your site, and it provides covered parking. For many commercial sites, the shade and weather protection are worth almost as much as the power.

• Steel frame designed and engineered for local wind and load conditions
• Solar array tilted for good generation and rain run-off
• Space underneath kept clear and usable for parking
• Can be sized from a handful of bays up toward the larger end of ATI's 6.6kW to MW range

Why car parks make sense for generation

Car parks are usually wide, flat and unshaded, which is exactly what solar wants. On many commercial sites the roof is already crowded with plant, skylights or leased tenancies, or it simply isn't structurally suited to a big array. The car park sidesteps all of that.

Because the structure is purpose-built, panels can be oriented and tilted for output rather than being dictated by an existing roofline. You're not compromising around vents, valleys and shading the way you often do on a retrofit.

• Uses space you already own without touching the building
• Panel orientation chosen for generation, not roof geometry
• Keeps your roof free for future works or existing plant
• Delivers shade and weather cover as a genuine bonus

Pairing carports with battery and energy arbitrage

Generating power is only half the story. What you do with it decides how much value you actually capture. A carport array feeds your daytime load first, and anything spare can charge a battery instead of being exported for little in return.

This is where ATI's AI-driven energy arbitrage comes in. The battery is managed to charge when power is cheap and discharge or export when prices are high, so your car park is working the market for you, not just soaking up sun. How much this is worth depends on your tariff, your load profile and your network.

• Daytime generation offsets your business load first
• Surplus can be stored rather than exported cheaply
• AI arbitrage times charge and discharge against price movements
• Actual benefit is site-specific and confirmed by a review

EV charging and future-proofing your fleet

A solar carport is a natural home for EV charging. You've got the structure, the parking bays and generation right overhead, so running chargers off the same infrastructure is a logical next step for fleets, staff and visitors.

Even if you're not charging EVs yet, it's worth planning the electrical layout so chargers can be added later without ripping things up. Getting the cable runs and switchboard capacity right early on saves a lot of grief down the track.

• Chargers can draw on carport generation during the day
• Sensible for depots, fleets and customer-facing sites
• Plan conduit and switchboard capacity up front
• Add chargers in stages as your fleet transitions

What to weigh up before you build

Carports involve more than panels. There's structural engineering, footings, ground conditions, drainage, lighting and how the build fits around a car park that probably needs to stay open. Planning and staging matter, and doing it with an in-house team keeps quality and timelines under control.

ATI handles the work with our own CEC and SAA accredited crews rather than subcontractors, on projects ranging from small commercial sites up to large rooftops like the 415kW array at DB Santasalo in Bulli. The right approach for your site depends on your bays, ground, load and tariff, which is what a review is for.

• Ground conditions and footings drive structural design
• Drainage, lighting and line marking need to be considered
• Staging keeps the car park usable during the build
• In-house accredited team, no subcontractors

Is a solar carport right for your site?

If you've got a decent car park and a roof that's full, unsuitable or off-limits, a carport is often the most practical way to generate your own power. The only reliable way to know what it's worth is to look at your actual space, load and tariff.

If you'd like to see whether your car park could pull its weight, book a site review with ATI. We'll assess the space, model the generation and storage options, and give you real figures rather than guesswork.

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