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Solar and Storage at a Transmission Node: The 30 MWp Kabba Hybrid Farm, Kogi State

Solar & Storage · Project Record
Solar and Storage at a Transmission Node: The 30 MWp Kabba Hybrid Farm
International Consolidated Contractors Offshore SAL Ltd  |  Kogi State, Nigeria  |  Nigeria Electrification Project
International Consolidated Contractors Offshore SAL Ltd designed, supplied, installed, tested and commissioned a 30 MWp hybrid solar farm at the 2×60 MVA transmission substation at Kabba, Kogi State. The Rural Electrification Agency, under the Nigeria Electrification Project, certified that the plant entered commercial use on 13 October 2021, for a total contract value of US$41,144,857.96. The contract was awarded on 3 March 2020 under reference REA-NEP/C/GO/RFP/47/25E, following a proposal submitted on 8 January 2020, and the Agency issued its certificate on 3 November 2021. The plant is a hybrid installation rather than a solar array alone: generation, storage, high-voltage interconnection and supervisory control were delivered under a single scope, together with a fifteen-year operation and maintenance commitment.

1Scope Delivered

ComponentSpecification
Solar PV array30 MWp, with all electrical and civil works — cabling, mounting structures, combiner boxes and water cleaning network
InvertersSolar inverters
Battery energy storage22 MW / 22 MWh BESS
Medium-voltage connection800 m of 33 kV underground line connection
High-voltage connectionHV 330 kV busbar
Substation worksSubstation, switchgears, transformers and complete connection to 330 kV
ControlControl and low-voltage network
Supervisory systemSCADA, complete control and monitoring
OperationsOperation and maintenance for 15 years
Aerial view of the 30 MWp Kabba hybrid solar farm at the 330 kV transmission node in Kogi State, Nigeria

The 30 MWp array at the 2×60 MVA transmission substation in Kabba — IMG-1

2Why the Storage Component Matters

A solar array alone produces power only when the sun is on it, and delivers that power to the grid at the moment of generation regardless of whether the grid needs it then. Pairing 30 MWp of generation with a 22 MW / 22 MWh battery converts an intermittent resource into a dispatchable one — power can be held and released when the network calls for it. On a Nigerian transmission system where available capacity, not installed capacity, is the binding constraint, that distinction determines whether new generation is useful.

Containerised 22 MW/22 MWh battery energy storage units at the Kabba hybrid solar farm

The 22 MW / 22 MWh BESS that makes the plant dispatchable — IMG-2

3Execution Record

MilestoneDate
Proposal submitted8 January 2020
Contract awarded3 March 2020
Entered commercial use13 October 2021
Certificate issued3 November 2021
Operation and maintenance term15 years from commissioning

The Agency’s certificate records that the farm is monitored and controlled remotely through Advanced Metering Infrastructure and a SCADA system, with live monitoring accessible continuously via security cameras; that execution followed the schedule submitted at the outset; and that the system is fully operational.


Remote control and monitoring via AMI and SCADA — IMG-3

4The Economic Weight of This Contract

The macroeconomic backdrop

The World Bank has estimated Nigeria’s annual economic losses from unreliable power at 5 to 7 per cent of GDP — in the order of US$25 billion a year. The constraint is not primarily installed capacity: Nigeria holds roughly 13 GW of installed generation but average available capacity has run closer to 4.5 GW, held down by ageing units, maintenance backlogs and liquidity problems. Generation that is both new and reliably dispatchable therefore addresses the binding problem rather than adding to a number that already overstates what the system delivers.

A fifteen-year revenue annuity, not a construction payment

This is the commercially distinctive feature of the contract and the one most relevant to an investor. The company did not build the plant and demobilise; it committed to operating and maintaining it for fifteen years from commissioning, including provision of all projected spare parts. That converts a single capital receipt into a contracted service position running to approximately 2036. For a contractor, the difference between an EPC business and an EPC-plus-services business is the difference between revenue that must be replaced every cycle and revenue that recurs — and it is the principal reason infrastructure services companies trade on different multiples from pure construction firms.

Operations require a permanent in-country capability

A fifteen-year O&M term on a hybrid plant cannot be serviced remotely. It requires a standing Nigerian team competent in PV maintenance, inverter servicing, battery management, HV switchgear and SCADA operation. That is a durable local establishment rather than a project-duration mobilisation, and it lowers the marginal cost of bidding subsequent Nigerian work.

Skills in a category Nigeria has little of

Nigeria has substantial experience in thermal generation and in distribution construction. Utility-scale solar with battery storage is a different technical discipline, and the pool of engineers and technicians who have operated grid-connected BESS at transmission voltage is correspondingly small. Personnel trained through a fifteen-year operations programme represent capability that did not previously exist in the domestic market.

Concentration in Kogi State

This contract sits alongside the company’s ₦15.3 billion Okene distribution programme in the same state, executed under a separate REA award. Generation at a transmission node and distribution network downstream of it are complementary investments, and delivering both gives the company an operating footprint in Kogi spanning the value chain from grid injection to the customer meter.

Displacement economics

Nigerian commercial and industrial users respond to unreliable supply by running diesel and petrol generators — a cost borne continuously, in hard currency for fuel, with maintenance and emissions attached. Every megawatt-hour delivered reliably from a grid-connected hybrid plant displaces self-generation that is more expensive per unit and worse for local air quality. The economic return on reliability accrues to the users, not only to the generator.

5Nigerian Programme Context

This project is one of three contracts executed by International Consolidated Contractors Offshore SAL Ltd for the Rural Electrification Agency under the Nigeria Electrification Project:

ProjectContract ReferenceValue (US$)
Kabba 30 MWp hybrid solar farm, KogiREA-NEP/C/GO/RFP/47/25E — Commissioned41,144,857.96
Maraban Jos 35 MWp hybrid solar farm, KadunaREA-NEP/C/GO/RFP/98/15B — October 202146,219,403.17
Solar home and distributed PV systemsREA-NEP/SHSDSS/2023/01 — January 20225,839,115.00
TotalHanded over March 202693,203,376.13

Note: the source table’s columns were misaligned; dates above were assigned by column position — please verify the milestone dates (Maraban Jos, solar home systems and the March 2026 handover) against the original certificates before publication.

330 kV substation switchgear and transformer connection for the Kabba hybrid solar farm

The 330 kV transmission interconnection — IMG-4

These sit alongside four medium- and low-voltage distribution contracts executed for the same Agency in Anambra, Cross River, Borno and Kogi States, together valued at ₦72,963,068,418.88. Supporting documentation — the Notification of Award dated 3 March 2020 and the Rural Electrification Agency certificate dated 3 November 2021, both under contract reference REA-NEP/C/GO/RFP/47/25E — is available on request.

Project Enquiries

International Consolidated Contractors Offshore SAL Ltd · 04 Oguda Close, Maitama, Abuja, Nigeria

Email: info@i-cc.co · Website: www.i-cc.co · Tel: +961 21 614100

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