Ground-Mounted Solar for Factories With Spare Land

When ground-mounted solar beats a rooftop system

A ground system is worth considering when one or more of these apply:

• The roof is weak or old. Many factory sheds in Punjab have sheet roofs on light purlins that were never designed for extra load.
• The roof is too small for the load. A spinning, weaving or processing unit with a large daytime demand can need more panels than the roof can hold.
• The roof will change. If you plan to replace sheets, extend the shed or add a floor, panels on top become an obstacle.
• You have idle land. Unused plot area, a back yard or land next to the boundary wall can be put to work.
• You want an ideal angle. On the ground, rows can face south at the tilt chosen for the site, without following a roof slope.

Ground mounting is not always better. It uses land, needs civil work and needs security. Many factories end up with a mix: panels on the sound roofs, a ground array on spare land and sometimes a solar carport over parking. See our industrial and commercial solar page for how we plan larger plants.

Diagram

Ground-mounted solar

Land

Clear, unshaded, level

Structure

Piles or foundations

Cable run

To the main panel

Rooftop vs ground-mounted: a quick comparison

How much land do you need?

It depends on panel size, tilt and the spacing between rows. Rows must be far enough apart that one does not shade the next in winter, when the sun is low. That spacing, plus walkways and access roads, means the land needed is much more than the area of the panels themselves.

As a rough planning idea only, a ground array needs several square metres of land per kW once spacing and access are included. Our guide to solar panel angle and direction for Punjab explains why tilt and row spacing are linked.

1. Foundations

Every ground structure is only as good as its foundations. Common approaches are:

• Concrete pad or pier foundations under each column, with anchor bolts or base plates. Widely used and easy to inspect.
• Strip foundations along each row, where soil or layout suits it.
• Elevated frames on pedestals, where the land floods or water stands in the monsoon.

What decides the choice:

• Soil. Loose fill, clay and old dumping ground behave differently. A simple soil check avoids sinking or tilting frames later.
• Flooding and drainage. Water standing around columns rusts the steel and softens the ground. Grade the land so water runs away, and keep the lowest panel edge well above any flood line.
• Wind. Ground arrays in open land see strong gusts in summer storms and the monsoon. Foundations and bracing must hold the frame against uplift.

The structure itself is usually galvanised steel, designed for the span and height. Our guide to L2, L3 and elevated solar structures covers materials and what to check in a structure quote.

2. Fencing and security

Panels on the ground are easier to reach than panels on a roof. Plan security from the start:

• a boundary wall or chain-link fence around the array, with a lockable gate;
• anti-theft bolts on panel clamps;
• lighting and, where sensible, cameras covering the array and inverter room;
• a written record of panel serial numbers, kept with your project file.

Our guide to solar panel theft protection goes into more detail. Keep the fence far enough from the panels that it does not shade the first row.

3. Cable trenching

A ground array is often some distance from the factory's main panel. The DC or AC cables between them run underground, and this is where poor work causes problems years later.

1. Choose where the inverters sit. Close to the array means longer AC runs; close to the main board means longer DC runs. The engineer weighs voltage drop, cable cost and safety.
2. Size cables for the distance. Long runs need larger cable to limit losses. See our solar cable size guide.
3. Use proper protection underground. Armoured cable or cable in conduit, laid at a sensible depth, with warning tape above it.
4. Mark the route. Cable markers on the surface stop someone digging through the line later.
5. Earth the whole array. A large steel frame on open ground needs a proper earthing and lightning plan. See solar earthing and surge protection.

4. Cleaning and maintenance access

Dust, lint from textile units and smog all build up on panels in Punjab. Ground arrays are easier to clean than shed roofs, but only if access is planned:

• Walkways between rows wide enough for a person with a hose or brush.
• A water point near the array, and a drain so cleaning water does not pool around foundations.
• Weed control. Grass and bushes grow fast in the monsoon and can shade the bottom row. Gravel, a weed sheet or regular cutting keeps them down.
• Access road for maintenance and, on bigger plants, for replacing an inverter or a damaged panel.

See how often to clean solar panels in dusty Punjab.

Bifacial panels on the ground

On a light surface such as gravel, bifacial panels can add a little rear-side output; treat it as a site-dependent bonus. See N-type, P-type and bifacial panels.

Sizing a ground plant under net billing

A factory with a strong daytime load uses most of its solar output itself, which is where solar is most valuable. Exported units under net billing are credited at a much lower rate than the units you buy. Your plant also cannot exceed your sanctioned load. Read our net metering and net billing guide before deciding on size, and consider battery storage for factories if you run evening shifts.

Ground-mounted solar price

Cost depends on land preparation, foundation type, structure height, fencing, cable distance and the size of the plant.

How Solar Works Pakistan handles ground plants

Solar Works Pakistan is an industrial solar EPC company with 50+ industrial clients among 300+ customers. For ground-mounted plants, our in-house engineering team, including dedicated AutoCAD experts, plans the layout, row spacing, foundations and cable routes. Our own team fabricates and assembles the structure on site. Structures carry our 3-year structure warranty; panels and inverters carry the manufacturer's warranty per product. We run all necessary tests before handover.

Get today's price or a free site survey

Send us your last 12 months of electricity bills, a sketch or photo of the spare land, and your shift pattern. We will tell you whether ground, roof or a mix suits your factory.

• WhatsApp or call: 0336 666 4321
• Email: info@solarworks.pk
• Head office: Main Boulevard, Sargodha Rd, Block F FDA City, Faisalabad
• Lahore branch: 2nd Floor, Jeff Heights, Gulberg, Lahore. See our Faisalabad and Lahore pages.
• Hours: 9:00 AM to 6:00 PM, daily

We serve all of Punjab, and site surveys are normally free. Contact us online.

Frequently asked questions

Is ground-mounted solar better than rooftop solar for factories?

Not always. Ground mounting is better when the roof is weak, too small or due for changes, and there is spare land. A sound, large roof is usually simpler and avoids using land. Many factories use both.

What foundations do ground-mounted solar panels need?

Usually concrete pads or piers under each column, sized for the soil and wind at the site. Where land floods, frames are raised on pedestals. The design should come from a site check, not a standard drawing.

How do you stop theft from a ground solar plant?

Fence the array, use anti-theft bolts, add lighting and cameras where sensible, and record every panel serial number. Keep the fence clear of the panels so it does not cause shading.

Should cables from a ground array run underground?

Generally yes, in armoured cable or conduit at a proper depth, with warning tape and surface markers. Cable size must suit the distance to keep losses down.

Can a ground plant be bigger than my sanctioned load?

Not if you want to connect it for net billing. Under the 2026 rules, solar capacity cannot exceed your sanctioned load. If you need more, raise your sanctioned load first.