LESCO net metering — how the process works

[TODO: VERIFY every regulatory detail on this page against current NEPRA and LESCO rules before publication. It is written to be structurally complete and deliberately avoids specific figures, timelines and tariffs that change.]

What net metering is

A standard meter counts energy in one direction. If a solar system generates more than the site is using at that moment, the surplus has nowhere to go.

Net metering replaces that meter with a bi-directional meter. Exported energy is recorded and credited against energy imported at other times — overnight, or on a poor-weather day. The commercial detail is set by regulation.

What it changes about the system

Net metering is not an accessory fitted at the end. It affects:

• Inverter selection — the equipment must meet the distribution company’s requirements.
• Protection design — export imposes its own requirements on the protection arrangement.
• Documentation — a single-line diagram and equipment datasheets are part of the application.

A system installed without these in mind may need rework before it can be approved, which costs more than designing for it from the start.

The steps

1. Design the system to meet the requirements, and document it.
2. Apply to the distribution company with the design and equipment documentation.
3. Inspection of the installation.
4. Meter installation — the bi-directional meter replaces the existing one.
5. Commissioning — export begins.

Where timelines actually go

Most delay comes from two places: applications submitted incomplete, and inspection scheduling. Neither is fully in the installer’s control, which is why we do not promise an approval date.

[TODO: VERIFY current typical timeline.]

What you are typically asked to provide

The exact requirements are set by the distribution company and change from time to time, so treat this as the shape of the submission rather than a checklist to prepare alone. In broad terms it involves:

• Identity documents for the person or entity the connection is registered to.
• A recent bill for that connection, since the application is made against it rather than against an address.
• The application form in force at the time.
• A single-line diagram of the proposed system.
• Datasheets for the modules, the inverter and the protection devices.
• Details of the installation and the installer.

Two practical points cause more delay than anything technical. The application must be made in the name the connection is registered in — an inherited property or a connection in a relative’s name needs sorting out first, not later. And the proposed capacity has to sit within what the connection permits, which is a question to settle before equipment is ordered rather than after.

What the review is actually checking

The distribution company is protecting its network, not assessing whether you got a good deal. The review looks at capacity against the sanctioned load and the connection phase, whether the inverter and protection meet current requirements, whether the single-line diagram describes a coherent and safe installation, whether the system will disconnect properly when the network is dead, and whether the earthing arrangement is sound. The inspection then checks that what was built matches what was submitted.

Why applications stall

• The system was designed without the requirements in mind and needs rework before it can be approved.
• Capacity exceeds what the connection allows, discovered after installation.
• Documents disagree — a diagram showing one inverter, a datasheet for another.
• The installation does not match its own drawings, found at inspection.
• Name and ownership mismatches between the applicant and the connection.
• Incomplete submissions, which go to the back of the queue rather than being corrected in place.

Every one of these is avoidable at design stage and slow to fix afterwards, which is the entire argument for deciding about net metering before the system is built rather than after.

After approval

Once the bi-directional meter is installed and the system is commissioned, two habits are worth forming.

Read the bill rather than filing it. Import, export and the treatment of any credit should be visible, and the first bill after commissioning is the one most worth checking carefully — meter configuration errors do happen, and they are far easier to raise early.

Compare export against expectation. A system that stops exporting has usually stopped generating, and on a net-metered connection that shows up in the numbers before anyone notices it on the roof.

Is it worth it?

It depends on the shape of your consumption. A site that uses most of its energy during daylight benefits less from export than one that generates a large midday surplus. That is a question the sizing estimator starts to answer, and a site survey finishes.