Commercial rooftop solar in the UAE: warehouses and factories

A warehouse or factory roof is usually the best solar site a UAE business owns: it is large, flat or gently pitched, unshaded, and the building uses most of its electricity in daylight, when the panels generate. In Dubai a commercial or industrial system connects behind the building's DEWA meter under Shams Dubai, with capacity limited by the building's connected load and by a per-plot cap of roughly 2 MW. Each kWp produces about 1,650 kWh a year, and for a business billed in DEWA's top slab each solar kWh saves about 44 fils, which is why well-sized commercial systems typically pay back in around four to five years.

Best sites

Warehouses, factories, logistics

Dubai connection

Shams Dubai net metering

Size limit

Connected load, ~2 MW per plot

Our commercial range

From about 100 kWp

Why warehouse and factory roofs suit solar

Three things decide whether solar works for a business: how much daytime electricity the site uses, how much usable roof it has, and what each kWh costs. Industrial and logistics buildings usually score well on all three.

• Daytime load. Cooling, lighting, conveyors, compressors and cold rooms run during working hours, so most solar output is used on site the moment it is generated.
• Large, open roofs. Plan on roughly 7 square metres of roof per kWp, including access paths and row spacing. A 5,000 m² warehouse roof can therefore hold a system in the region of 700 kWp, before deducting skylights, plant and fire access routes.
• High tariff slab. A building using tens of thousands of kWh a month is billed mostly at DEWA's highest rate, so every solar kWh replaces an expensive one.

Offices, schools, labour accommodation and retail units benefit too, but their roofs are often smaller relative to their load. Where the roof runs out, a solar car park canopy can add capacity.

How much a commercial system saves in Dubai

DEWA bills commercial customers in the same monthly slabs as homes: 23 fils per kWh up to 2,000 kWh, 28 fils to 4,000 kWh, 32 fils to 6,000 kWh and 38 fils above 6,000 kWh. Industrial customers pay 23 fils for the first 10,000 kWh and 38 fils above that. A fuel surcharge, currently about 6 fils per kWh, is added to every unit (see DEWA's slab tariff page for current rates).

Solar takes units off the top of the bill. For a site whose monthly use is well above the top threshold, each solar kWh is worth 38 + 6 = 44 fils. VAT-registered businesses normally recover VAT, so the figures below leave it out.

AED 3,300 per kWp is our guide price for a complete villa system, used here as a ceiling: larger systems spread design, approvals and mobilisation over more kWp, so a commercial quotation is set after a site survey and is usually not higher per kWp. The example assumes the building uses all of the solar output plus at least the 6,000 kWh (commercial) or 10,000 kWh (industrial) monthly threshold. Our payback guide shows the same method for villas, and the UAE solar calculator runs it on your own figures.

Sizing: connected load first, roof second

Under Shams Dubai the installed capacity is limited relative to the building's total connected load, and there is a cap per plot. In 2020 DEWA announced that capacity per plot is capped at 2,080 kW, that lower limits apply according to connected load, and that ground-mounted projects are no longer part of Shams Dubai. Check the current DRRG connection conditions at design stage, because DEWA revises them.

Within that limit, an honest design is sized to consumption rather than to the full roof:

1. Read twelve months of DEWA bills to see monthly consumption and how much falls in the top slab.
2. Look at the load profile. A two-shift factory and a warehouse that closes at 5 pm use solar differently; weekend and holiday loads matter too.
3. Avoid oversizing. In Dubai, exported units are credited against later imports and unused credits roll forward, but they are not paid out in cash. Capacity beyond the site's yearly need adds cost without adding saving.
4. Fit the array to the roof once the target size is known, keeping access routes clear for maintenance and emergency services.

Outside Dubai the rules differ: Abu Dhabi uses a self-supply framework rather than net metering, and credits in the northern emirates expire each year. See UAE solar rules compared.

Roof checks before you commit

• Structure. An engineer confirms the roof can carry the added load of panels, rails and cable trays, and the wind uplift on them. Older lightweight sheet roofs sometimes need strengthening or a lighter mounting system.
• Roof type. Metal sheet roofs normally take rail or clamp systems fixed to the seams or purlins; concrete roofs use anchored or ballasted frames. Every penetration needs proper sealing.
• Remaining roof life. Panels last 25 years or more. If the roof sheeting or waterproofing is due for replacement, do it before the array goes on; see how long solar panels last in the UAE.
• Dust and access. Industrial areas are dusty. Walkways and a water point make regular cleaning practical; our cleaning and maintenance guide covers schedules for businesses.
• Electrical capacity. The survey checks the main switchboard and transformer arrangement, which decides where the inverters connect.

Approvals, leases and timeline

The Shams Dubai steps are the same as for any building: a DEWA-enrolled contractor applies for the NOC through DEWA's Hab Reeh platform, submits the design with equipment from DEWA's eligible list, installs, and arranges DEWA's inspection before the bidirectional meter is fitted. Our Shams Dubai guide walks through each stage.

Design approval is where commercial projects take longest, because protection settings, single line diagrams and equipment listing are checked closely. If your business leases the building, the application needs the owner's written consent, so involve the landlord early and agree in the lease who owns and maintains the system. Commercial timelines are confirmed after the survey and depend on size; a villa system, by comparison, typically goes from signed contract to generation in about two weeks.

Paying for it: EPC or EPC plus finance

A business can buy the system outright under an EPC contract, keeping all of the bill saving, or use an EPC plus finance structure that spreads the capital cost over time. The choice usually comes down to the balance sheet and how long the business expects to occupy the building. Batteries can be added to shift midday generation into the evening, but for most daytime-load sites in Dubai net metering already captures the value of surplus units; see our battery storage EPC page for when storage pays.

Frequently asked questions

Sources

• DEWA, "Slab tariff": current electricity slabs and fuel surcharge by customer category.
• Property Finder, "DEWA calculator": summary of DEWA's residential/commercial and industrial slabs and the fuel surcharge.
• SolarQuarter, "No exceptions by DEWA for PV projects under Shams Dubai": the 2,080 kW per-plot cap, connected-load limits and the end of ground-mounted projects (May 2020).
• SolarQuarter, "Shams Dubai connects over 725 MW across 8,430 buildings": programme scale and the Hab Reeh platform (June 2025).
• DEWA, "PV equipment eligibility": eligible panels and inverters for Shams Dubai connections.

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