Kogi State

Rooftop solar in Igalamela-Odolu, Kogi: what the roofs are worth

Igalamela-Odolu has 60,291 buildings with a viable rooftop and 829 MWp of roof capacity. 17% run a generator, and together they spend ₦14.1bn a year on energy.

Viable buildings

60,291

Usable roof area

3.71 km²

829 MWp roof capacity

Energy spend

₦14.1bn/yr

13.5 GWh/yr burned on generators

Median payback

6.4 yr

Median IRR 17% (cash saved)

The savings bracket for Igalamela-Odolu

Approach B

Cash saved

What these buildings stop paying — merit order, capped at current spend.

Current energy spend₦14.1bn/yr

Year-one cash saved₦13.7bn

Lifetime cash saved₦727bn

NPV₦112bn

Median IRR17%

Median payback6.4 yr

Unlocked energy14.2 GWh/yr

Approach A

Energy value (upper bracket)

What the energy is worth if full latent demand were met. Not cash saved.

Installed capacity77.2 MWp

Capex₦78.3bn

Year-one energy value₦69bn

Lifetime energy value₦3.27tn

NPV₦551bn

Median IRR99%

Median payback1.1 yr

Three ways to size Igalamela-Odolu's rooftops

Solar + battery. The default headline scenario, and the one the SEO fact base quotes. Prices the energy a full solar+storage system would deliver.

Baseline: mixed

Counterfactual: grid when available, generator otherwise, weighted by the NTL-derived grid availability. The realistic case, and what the headline numbers use. Always falls between grid and genset by construction.

Read with care: Sized to LATENT demand — the energy the building would use if it could. Against a cash baseline that only reflects today's spend this looks oversized; that is what sc3 exists to fix.

System size: 77.2 MWp
Capital cost: ₦78.3bn
Year 1 savings: ₦69bn/yr
NPV: ₦551bn
Median IRR: 99%
Median payback: 1.1 yr

The odds a rooftop in Igalamela-Odolu pays back quickly

Of the 58,832 buildings in Igalamela-Odolu with a modelled payback, 39.4% pay back inside five years and 17.3% inside three.

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How much of Igalamela-Odolu's demand actually gets met

Buildings in Igalamela-Odolu consume 22.8 GWh/yr but want 37.1 GWh/yr. The 38% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Igalamela-Odolu

Loading band economics…

How many rooftops in Igalamela-Odolu actually pay

Counted building by building on the cash-saved basis (merit-order sized, valued against what the building spends today), not read off an average. Shares are of the 58,832 buildings with a modelled result out of 60,291 in Igalamela-Odolu. 31,228 clear a positive NPV.

Payback

Under 3 years10,203 (17%)

Under 5 years23,204 (39%)

Under 7 years31,155 (53%)

Under 10 years36,539 (62%)

Return (IRR)

Above 10%35,097 (58%)

Above 15%31,228 (52%)

Above 20%25,620 (42%)

Above 25%19,045 (32%)

CO₂ avoided

26.2 kt/yr

Fuel avoided

6.72 million litres/yr

Energy unlocked

14.2 GWh/yr

Demand that is suppressed today

People served

180k

What hardware costs right now

Median advertised rates from our Nigerian market tracker — the same prices used to cost a system in Igalamela-Odolu.

Solar panels

₦250

₦/W

Inverters

₦127,419

₦/kVA

Batteries

₦177,500

₦/kWh

Full price tracker Size a home system Size a business system

Building mix in Igalamela-Odolu

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
E	38,917	6,423	₦7.25bn	₦7.18bn	15%	6.9 yr
D	21,018	3,576	₦6.37bn	₦6.11bn	17%	5.9 yr
C	356	250	₦517m	₦458m	57%	1.9 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	58,517	8,860	₦9bn	₦8.84bn	15%	6.6 yr
Commercial General	883	683	₦2.29bn	₦2.29bn	53%	1.9 yr
Commercial Retail	387	229	₦41.3m	₦41.3m	47%	2.1 yr
Anchor	371	354	₦2.7bn	₦2.48bn	57%	1.9 yr
Worship	99	89	₦31.2m	₦31.2m	57%	1.9 yr
Productive Use	23	23	₦4.42m	₦4.42m	59%	1.9 yr
Hospitality	9	9	₦64.3m	₦64.3m	57%	1.9 yr
Industrial	2	2	₦61.8k	₦61.8k	43%	2.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	19,217	1,941	₦202m	₦201m	5%	16.9 yr
50 100m2	14,919	2,440	₦1.39bn	₦1.29bn	21%	5.1 yr
100 250m2	12,200	3,390	₦4.79bn	₦4.73bn	25%	4.4 yr
30 50m2	11,474	1,444	₦301m	₦301m	9%	12.9 yr
250 1000m2	2,402	987	₦5.24bn	₦5.24bn	25%	4.1 yr
Over 1000m2	79	47	₦2.21bn	₦1.99bn	55%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	23,628	2,951	₦4.09bn	₦3.76bn	7%	13.9 yr
Urban	14,613	2,114	₦3.02bn	₦2.96bn	17%	6.1 yr
Dense Urban	9,365	2,615	₦2.49bn	₦2.49bn	19%	5.6 yr
Rural	7,283	1,061	₦1.11bn	₦1.11bn	17%	6.6 yr
Urban Centre	5,402	1,508	₦3.43bn	₦3.43bn	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	26,101	2,426	₦252m	₦252m	7%	15.6 yr
Residential Small	17,997	2,930	₦1.46bn	₦1.36bn	21%	5.1 yr
Residential	11,778	3,387	₦7.19bn	₦7.13bn	25%	4.4 yr
Residential Formal	1,984	0	₦30.6m	₦30.6m	17%	5.9 yr
Residential Informal	511	117	₦67.9m	₦67.9m	25%	4.4 yr
Commercial Corridor	496	311	₦796m	₦796m	47%	2.1 yr
Kiosk Shop	407	249	₦45.4m	₦45.4m	49%	2.1 yr
Institutional	223	212	₦2.08bn	₦1.85bn	55%	1.9 yr
Commercial	200	196	₦1.12bn	₦1.12bn	59%	1.9 yr
Educational Facility	114	110	₦313m	₦313m	83%	1.4 yr
Apartment	110	0	₦1.76m	₦1.76m	23%	4.9 yr
Healthcare Facility	89	86	₦397m	₦397m	51%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	60,291	10,249	₦14.1bn	₦13.7bn

Not published for this cube: Median IRR, Median payback.

Lead segment

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Standard	59,222	9,386	₦9.52bn	₦9.36bn	15%	6.6 yr
SME High	701	512	₦1.92bn	₦1.92bn	51%	2.1 yr
Enterprise	368	351	₦2.69bn	₦2.47bn	59%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	26,046	2,436	₦251m	₦251m
3.0	16,102	4,565	₦9.66bn	₦9.38bn
2.0	10,369	1,875	₦1.56bn	₦1.46bn
4.0	3,844	486	₦1.29bn	₦1.29bn
1.0	3,582	678	₦305m	₦305m
5.0	285	157	₦612m	₦612m
6.0	63	52	₦446m	₦446m