Solar for Apartments and Flats: What Is Possible

This guide explains what works, what does not, and how to approach your building's management.

Why apartments are harder than houses

A house owner controls the roof, the meter and the wiring. In a block of flats, none of those is simple:

• The roof is shared. It usually belongs to all owners together, or to a developer or management committee.
• Each flat has its own meter. A solar system connects behind one meter and supplies only that connection.
• Roof space per flat is small. A five-storey block with ten flats per floor might have enough roof for one modest system, not fifty.
• Cable routes are long. Running DC or AC cables from the roof down to a flat on the second floor means going through shared ducts and walls.
• Shading from neighbouring buildings is common in dense areas.

None of this makes solar impossible. It changes who should own the system and what it should power.

Diagram

Solar options in a building

Common areas

Lifts, pumps and lights on the building meter

Shared roof

Needs the building's permission

Balcony

Small backup only

Option 1: Building-level solar for common loads (usually the best fit)

Every apartment building has loads that belong to everyone:

• Water pumps lifting water to roof tanks
• Lifts
• Corridor, stair and parking lights
• Security cameras, gate motors and guard room
• Common-area fans or ACs in lobbies and offices

These usually run on a separate common-area connection, and much of their use falls in daylight. A rooftop system feeding that connection directly offsets the common bill, which reduces the maintenance charge every resident pays. It also avoids the question of how to split one roof between many flats.

How it usually works:

1. The management committee or owners' association agrees in principle and nominates someone to deal with the installer.
2. The installer surveys the roof, the common meter and the load.
3. The system is sized mainly to daytime common loads.
4. The cost is shared through the maintenance fund or a one-time contribution, as the owners agree in writing.

If the building has load-shedding, a hybrid system with a battery can also keep water pumps, emergency lighting and security running during outages. Lifts themselves have high starting loads and need careful engineering before connecting them to any backup system.

Option 2: A system for one flat on the shared roof

Some owners, often on the top floor, want their own system on part of the roof. This can work, but only if:

• You have written permission from the other owners or the management body, stating which roof area you may use, for how long, and what happens if you sell.
• There is a safe cable route from roof to flat that does not run loose across shared areas.
• The roof can carry the structure. Older roofs and those already carrying water tanks need checking. See will my roof hold solar panels?
• Your share of roof is enough for a useful system. Solar Works Pakistan designs systems from about 6 kW upwards, which needs roughly 400 to 450 sq ft of clear roof (see solar panel size in feet).

If other owners later want the same, the roof can run out quickly. That is why many buildings decide on Option 1 first and then allot any remaining space fairly.

Option 3: Balcony and window panels

Small panels on a balcony railing or window ledge are popular online. Be realistic about them:

• Output is small. One or two panels give a few hundred watts at best, and only when the balcony faces the sun. North-facing or shaded balconies produce very little.
• Safety matters. Panels must be firmly fixed. A loose panel falling from a height in a storm is dangerous to people below.
• Building rules apply. Many buildings do not allow fixtures on the outside of the façade.
• They do not run ACs. At most they help a fan, lights or charging through a small battery setup.

Balcony systems of this size are outside Solar Works Pakistan's scope; we design systems from about 6 kW upwards. If load-shedding backup for a flat is your main concern, our guide to UPS vs solar for load-shedding may help you decide.

Net billing and apartments

Grid-connected systems come under NEPRA's net billing rules for new connections since 9 February 2026. Points that matter for buildings:

• Eligibility: the regulations refer to three-phase 400 V or 11 kV consumers. A building's common-area connection is often three-phase; individual flat connections are often single-phase.
• Size cap: system capacity cannot exceed the sanctioned load of the connection it is attached to.
• One system, one meter: solar connected behind the common meter offsets only the common bill. It cannot normally be divided among separate flat meters.
• Self-use first: exported units earn much less than the units you buy, so size to the building's daytime load.

Full details are in our net metering and net billing guide.

Commercial and mixed-use buildings

Many Punjab buildings have shops on the ground floor and flats above. The roof rights, meter and cost-sharing questions are the same as in a plaza. Our guide to commercial solar for shops and plazas covers them in detail, and larger buildings fall under our industrial and commercial solar work.

Practical steps for residents and committees

1. Collect 12 months of bills for the common-area connection, and for your own flat if relevant.
2. Find out who controls the roof: owners' association, developer or society.
3. List what the roof already carries: tanks, dishes, AC outdoor units, a generator.
4. Ask for a survey of the roof and the main electrical room.
5. Put permission and cost-sharing in writing before any work starts.
6. Plan for maintenance: who cleans the panels, who holds the keys to the roof, who calls for service.

An elevated structure can put panels above water tanks and AC units and keep the roof usable. See L2, L3 and elevated solar structures.

How Solar Works Pakistan can help

For building-level systems from about 6 kW upwards, our engineer can survey the roof and electrical room, and our in-house team designs the structure and system around the building's load. Site surveys are normally free. We install with our own teams, and the quotation lists brand, model, quantity and warranty for each item, with the manufacturer's warranty per product given in writing. Structures carry a 3-year Solar Works Pakistan structure warranty. Read what happens during a site survey and see our installation services and system price guide.

Get today's price or a free site survey

Send the common-area bills and a few roof photos, and we will tell you honestly what the building can support.

• 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
• Hours: 9:00 AM to 6:00 PM, daily

We serve buildings across all of Punjab. See our Faisalabad and Lahore pages, or contact us.

Frequently asked questions

Can I install solar panels in my flat?

Only if you have written permission to use part of the shared roof and a safe cable route to your flat. In most buildings, a shared system for common loads is more practical than individual flat systems.

Can one rooftop system supply all the flats?

Not directly. A system connects behind one meter, and power cannot normally be shared across separate flat meters. That is why building systems usually run the common-area connection.

Are balcony solar panels worth it?

Usually not for meaningful bill savings. They give a few hundred watts at most, depend heavily on the balcony's direction, and must be fixed very securely. They are outside our scope.

Who pays for solar on an apartment building?

That is for the owners to agree. Common approaches are a one-time contribution from each owner or use of the maintenance fund, with the benefit shown as a lower common bill. Put the agreement in writing.

Can an apartment building get net billing?

Possibly, if the connection meets the DISCO's eligibility rules, such as being three-phase, and the system stays within its sanctioned load. Check the specific connection with your DISCO before design.

Will solar panels damage the building's roof?

Not if the structure is designed for that roof and fixed and sealed properly. Older roofs, and roofs already carrying tanks, should be checked before installation.

Sources

1. IIPS, "Solar-Powered Housing Societies: Opportunity or Regulatory Challenge?" (shared services first; coordination with DISCOs): https://iips.com.pk/solar-powered-housing-societies-opportunity-or-regulatory-challenge/
2. Net billing facts are carried from our guide /guides/net-metering-net-billing-pakistan/, which lists its own sources, including the NEPRA (Prosumer) Regulations, 2026.