Nigeria's Net Billing Regulations 2026: What Every Energy Investor, Business Owner, and Developer Must Know
The Regulations establish a comprehensive legal and commercial framework under which electricity Prosumers (those who produce and consume electricity), can interconnect renewable energy installations at their premises to the distribution network, export surplus power to the grid, and receive monetary credits against their electricity bills.
This is not a minor administrative update. The Net Billing Regulations fundamentally restructure the relationship between power consumers and the national grid. For businesses operating in Nigeria, energy developers, real estate owners, and investors in the renewable energy space, these Regulations represent both a compliance obligation and a commercial opportunity.
I. Overview: What Is Net Billing?
Net billing is an arrangement under which a Prosumer installs a qualifying Renewable Energy System (RES) at its premises and is permitted to export surplus electricity into the DisCo's distribution network. The energy exported generates monetary credits, which are then offset against the Prosumer's electricity import bills within the same billing cycle.
Unlike simple self-generation (where surplus energy is wasted or stored), net billing creates a formal, contractually governed commercial link between the Prosumer and the DisCo.
KEY DEFINITION — 'PROSUMER'
Under the Net Billing Regulations, a Prosumer is a User within the supply area of a Distribution Licensee who has commissioned a Net Billing Arrangement with that Distribution Licensee. Any business or individual holding an electricity supply account and installing a qualifying Renewable Energy System can become a Prosumer.
II. Who Is Eligible? Scope and Capacity Thresholds
The Regulations apply to Renewable Energy Systems connected to a distribution network in Nigeria with a minimum installed capacity of 50kWp and a maximum of 1.5MWp per User. This means the framework is calibrated primarily for commercial, industrial, and large institutional Prosumers, rather than small residential users.
Key eligibility and capacity rules include:
The installed generation capacity of a Net Billing Facility must not be less than 50kWp and must not exceed 1.5MWp.
The approved export capacity must not exceed 120% of the Prosumer's Eligible Load Demand which is the highest average monthly maximum demand over the preceding 12 months.
The aggregate excess capacity injected into a DisCo's 0.4kV, 11kV, or 33kV network by all Prosumers must not exceed 30% of the average load of the relevant network asset.
Where a Prosumer demonstrates verifiable and imminent load expansion, the DisCo may approve export capacity exceeding the 120% threshold, capped at projected load demand within 24 months.
The capacity limitation applies to the inverter-rated alternating current (AC) export capacity capable of injection into the distribution network.
PRACTICAL NOTE
Businesses planning to install solar PV or other qualifying systems should benchmark their installations against their 12-month maximum demand history. Systems that over-spec or exceeds your approved export ceiling relative to load history may face export restrictions at the grid level, making an accurate demand assessment a prerequisite to any net billing application.
III. The Application and Approval Process
The Regulations introduce a structured multi-stage process for joining the Net Billing framework. This process involves the DisCo, NERC, and the Nigerian Electricity Management Services Agency (NEMSA). Understanding this pipeline is critical for any business planning a net billing installation.
Stage 1 — Application to the DisCo
A prospective Prosumer must submit a formal application to the relevant Distribution Licensee using the prescribed form (Schedule 1), accompanied by:
Proof of occupation or ownership of the premises.
A single-line diagram of the proposed interconnection, certified by a COREN-licensed Engineer.
Technical specifications of the proposed renewable energy system, including projected excess capacity available for export.
Where a system already exists, the applicant is to submit a generation history, prior approvals, and a certified inspection report.
Stage 2 — Technical Feasibility Assessment
Within 15 days of receiving a complete application, the DisCo must conduct a technical feasibility study and issue a Distribution System Technical Feasibility Report (Schedule 2). This report covers user load details, network capacity, infrastructure suitability, and whether network upgrades are required.
Stage 3 — Execution of Net Billing Agreement
Where the application is approved, the User and the DisCo must execute a Net Billing Agreement (Schedule 3) within 5 days of the Feasibility Report. The agreement specifies the approved export capacity, interconnection voltage level, applicable export tariff, and compliance confirmations.
Stage 4 — NERC Registration
The User must apply for registration with NERC using the prescribed form (Schedule 5), accompanied by the Net Billing Agreement. NERC shall issue a registration certificate electronically within 10 days.
Stage 5 — Connection Charges and Network Works
Following registration, the Prosumer pays the applicable Connection Charge to the DisCo: within 15 days where no upgrade is required, or within 30 days where network reinforcement is needed. The DisCo then completes interconnection works within 30 days (or 120 days for major reinforcement at 11kV or 33kV).
Stage 6 — NEMSA Inspection and Commissioning
(Sections 14–15)
After installation, the Prosumer applies to NEMSA for a safety inspection. NEMSA has 10 days to inspect and 5 days to issue an inspection certificate or notify deficiencies. Commissioning by the DisCo must then occur within 3 days of a complete commissioning request. No RES may export electricity prior to commissioning approval.
TIMELINE SUMMARY
The full process from application to commissioning involves at least 6 regulatory stages. Businesses should plan for a minimum lead time of approximately 90–120 days for a standard installation, or up to 180 days where network reinforcement is required. Early engagement with the relevant DisCo and procurement of COREN-certified engineering support is strongly advised.
IV. The Commercial Framework: Tariffs and Credits
The commercial logic of the Net Billing Regulations is built around a distinction between the Retail Tariff (the rate at which Prosumers are billed for energy imported from the grid) and the Export Tariff (the rate at which credits are calculated for energy exported to the grid).
How the Export Tariff Is Calculated
The Export Tariff (ET) is determined by applying the Export Tariff Factor (ETF) to the Avoided Cost Delivered (ACD), using the formula:
ET = ACD × ETF
ACD = (GC + TC) ÷ (1 − TLF)
Where: GC = Generation Cost (₦/kWh); TC = Transmission & Admin Cost (₦/kWh); TLF = Transmission Loss Factor; ETF = Commission-approved Export Tariff Factor.
The Export Tariff Factors are set at 0.55 for off-peak exports and 0.75 for peak exports with peak period being defined as 6pm to 9pm daily. This means Prosumers who can export during peak hours receive a significantly higher credit rate, creating a strong commercial incentive to install Battery Energy Storage Systems (BESS) that allow storage of solar-generated power for peak-time discharge.
The Peak Export Tariff Premium
To access the higher peak export tariff, a Prosumer's Net Billing System must include a qualifying Battery Energy Storage System (BESS) verified by NEMSA, with usable capacity of at least 2 hours of rated output at 50% of installed RES capacity, and capable of independent charging from the RES and discharge to the grid. Systems without qualifying BESS are settled at the off-peak export tariff for all exports.
Monthly Billing and Credit Settlement
DisCos must issue monthly bills clearly stating imported energy (kWh), exported energy (kWh), applicable tariffs, monthly import charges, monthly export credits, and carried-forward credit balances. The billing logic works as follows:
Where the monthly export credit and any carried-forward credit exceed the import bill, no payment is due and the surplus is recorded as a Carried-Forward Credit.
Where the import bill exceeds the export credit and carried-forward credit, the Prosumer pays the net amount within the applicable settlement period.
The net billed amount shall never be negative as cash payments from DisCos to Prosumers are not available under the standard framework.
Carried-Forward Credits are applied solely to offset future import charges and are netted off annually at the anniversary of connection.
Credits are transferred with the premises on change of ownership (if the Net Billing Agreement is also transferred) but are extinguished upon relocation of the system or termination of the agreement.
INVESTOR INSIGHT
The monetary credit structure, the peak export premium for BESS-equipped systems, and the non-expiry of credits within the annual cycle make net billing commercially attractive for commercial and industrial electricity consumers. However, the inability to receive cash payments means the primary value proposition is bill reduction and not revenue generation. Business models premised on cash receipts from DisCos will not be supported under the current framework.
V. Technical and Safety Requirements
The Regulations impose detailed technical requirements that prospective Prosumers and their engineers must satisfy. Key requirements include:
All Net Billing Systems must be designed, installed, and maintained by a certified technician in compliance with the Distribution Code and the Nigerian Electricity Supply and Installation Standards (NESIS) Regulations.
Systems must include protection mechanisms against over/under-voltage and frequency deviations, a switching/changeover panel capable of both automatic and manual isolation, and anti-islanding protection and synchronisation mechanisms.
Isolators must meet minimum criteria: visible open/close indicators, accessible to DisCo personnel at all times without prior clearance, lockable in the open position, and installed in a safe and accessible position.
All components including generating equipment, inverters, meters, and control devices must be properly grounded per NESIS Regulations. Failure to provide adequate grounding constitutes a violation subject to enforcement.
Paralleling devices such as relays and contactors must withstand 220% of the nominal voltage at the interconnection point in compliance with IEC 61727 standards.
Meters must be NEMSA-certified, Time-of-Use (TOU), revenue-grade, bi-directional net meters recording both imported and exported energy separately.
VI. Monitoring, Dispute Resolution, and Compliance
The Regulations establish a robust oversight regime. DisCos are required to maintain accurate registers of all approved Net Billing Facilities and publish quarterly aggregated data including total approved facilities, total installed capacity, and feeder-level export capacity utilisation. DisCos must also submit quarterly compliance reports to NERC.
For dispute resolution: parties must first attempt negotiation within 30 days of a dispute arising. If unresolved, either party may refer the matter to NERC for determination. NERC shall resolve referred disputes within 30 days of receipt of all documentation. NERC's decision is binding, without prejudice to any right of appeal under the Electricity Act 2023. Critically, the filing of a dispute does not suspend performance obligations under the Net Billing Agreement unless NERC directs otherwise.
On tariff stability: the Regulations guarantee that settlement parameters applicable at the time of agreement execution remain in force for a minimum of 12 months from the connection date, notwithstanding any earlier revision by NERC. This provides a degree of commercial certainty for businesses making investment decisions.
VII. Key Action Points for Interested Parties
The Net Billing Regulations 2026 are now in force. Businesses and developers with existing or planned renewable energy installations at their premises should take the following steps:
Conduct an energy audit: Review your 12-month maximum demand data to determine your Eligible Load Demand and calibrate the appropriate installed capacity and export capacity for any planned system.
Engage your DisCo: Contact the relevant Distribution Company to understand the published application procedure, eligibility criteria, and applicable tariff structure for your network area.
Commission engineering support: Engage a COREN-licensed engineer to prepare the single-line diagram and technical specifications required for the initial application.
Assess BESS viability: If peak export tariff eligibility is commercially important to your business case, assess the cost-benefit of including a qualifying Battery Energy Storage System in your installation.
Review existing solar/RES installations: If you have an existing off-grid or hybrid system at commercial premises, assess whether it meets the minimum 50kWp threshold and whether formalising it under the Net Billing framework is commercially advantageous.
Seek legal and regulatory advice: The Net Billing Agreement is a binding commercial contract with liability, indemnification, and termination provisions. Independent legal review before execution is strongly recommended.
Conclusion
The NERC Net Billing Regulations 2026 represents a significant structural reform to Nigeria's renewable energy regulatory landscape in recent years. By creating a legal pathway for Prosumers to interconnect with the grid and receive bankable, monetised credits for surplus energy, the Regulations fundamentally alter the commercial calculus of renewable energy investment at the commercial and industrial scale.
For businesses currently investing in or operating diesel-dependent power systems in Nigeria, the Net Billing framework offers a credible, regulatory-backed alternative that can materially reduce energy costs over time. For developers and investors in the energy space, it opens new opportunities for behind-the-meter solutions, BESS integration, and energy services.
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Prepared by Kiet Law | For enquiries on the Net Billing Regulations 2026, energy regulatory compliance, or renewable energy transaction advisory, please contact us.
This article is provided for general informational purposes only and does not constitute legal advice. Specific legal or regulatory advice should be sought in relation to any particular circumstances.
