Kogi State

Rooftop solar in Olamaboro, Kogi: what the roofs are worth

Olamaboro has 109,987 buildings with a viable rooftop and 1.36 GWp of roof capacity. 9% run a generator, and together they spend ₦10.8bn a year on energy.

Viable buildings

109,987

Usable roof area

6.12 km²

1.36 GWp roof capacity

Energy spend

₦10.8bn/yr

10.1 GWh/yr burned on generators

Median payback

8.1 yr

Median IRR 11% (cash saved)

The savings bracket for Olamaboro

Approach B

Cash saved

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

Current energy spend₦10.8bn/yr

Year-one cash saved₦10.7bn

Lifetime cash saved₦570bn

NPV₦84.3bn

Median IRR11%

Median payback8.1 yr

Unlocked energy11.6 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity81.8 MWp

Capex₦86.3bn

Year-one energy value₦79.1bn

Lifetime energy value₦3.77tn

NPV₦638bn

Median IRR101%

Median payback1.1 yr

Three ways to size Olamaboro'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: 81.8 MWp
Capital cost: ₦86.3bn
Year 1 savings: ₦79.1bn/yr
NPV: ₦638bn
Median IRR: 101%
Median payback: 1.1 yr

The odds a rooftop in Olamaboro pays back quickly

Of the 107,824 buildings in Olamaboro with a modelled payback, 28.7% pay back inside five years and 9.6% inside three.

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How much of Olamaboro's demand actually gets met

Buildings in Olamaboro consume 18 GWh/yr but want 29.7 GWh/yr. The 39% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Olamaboro

Loading band economics…

How many rooftops in Olamaboro 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 107,824 buildings with a modelled result out of 109,987 in Olamaboro. 47,859 clear a positive NPV.

Payback

Under 3 years10,301 (10%)

Under 5 years30,974 (29%)

Under 7 years47,761 (44%)

Under 10 years62,327 (58%)

Return (IRR)

Above 10%59,295 (54%)

Above 15%47,859 (44%)

Above 20%35,535 (32%)

Above 25%23,534 (21%)

CO₂ avoided

20.9 kt/yr

Fuel avoided

5.17 million litres/yr

Energy unlocked

11.6 GWh/yr

Demand that is suppressed today

People served

251k

What hardware costs right now

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

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 Olamaboro

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
E	78,121	7,488	₦7.35bn	₦7.35bn	11%	8.1 yr
D	31,514	2,666	₦3.14bn	₦3.09bn	11%	8.6 yr
C	330	207	₦301m	₦301m	55%	1.9 yr
B	22	0	₦2.29m	₦2.29m	11%	7.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	107,206	8,530	₦7.22bn	₦7.21bn	11%	8.6 yr
Commercial Retail	1,041	522	₦77m	₦77m	35%	3.1 yr
Commercial General	1,034	668	₦1.24bn	₦1.24bn	53%	2.1 yr
Anchor	428	405	₦2.14bn	₦2.1bn	61%	1.6 yr
Worship	251	211	₦91.4m	₦91.4m	55%	1.9 yr
Industrial	23	21	₦21.3m	₦21.3m	59%	1.9 yr
Productive Use	4	4	₦478k	₦478k	57%	1.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	31,927	2,362	₦244m	₦243m	5%	16.6 yr
50 100m2	29,347	2,457	₦1.03bn	₦1.03bn	17%	6.1 yr
30 50m2	25,009	1,637	₦327m	₦326m	9%	13.6 yr
100 250m2	21,041	3,139	₦4.37bn	₦4.35bn	25%	4.4 yr
250 1000m2	2,624	747	₦4.1bn	₦4.07bn	27%	4.1 yr
Over 1000m2	39	19	₦720m	₦719m	27%	4.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	41,376	4,250	₦4.54bn	₦4.5bn	13%	8.1 yr
Unclassified	38,218	2,553	₦3.33bn	₦3.32bn	9%	13.1 yr
Dense Urban	16,236	2,567	₦2.2bn	₦2.2bn	17%	5.9 yr
Rural	14,157	991	₦724m	₦724m	9%	9.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	44,977	2,317	₦277m	₦277m	7%	15.6 yr
Residential Small	30,660	2,845	₦967m	₦966m	17%	6.4 yr
Residential	25,445	3,214	₦5.83bn	₦5.83bn	23%	4.4 yr
Residential Formal	4,520	103	₦82.5m	₦82.5m	17%	6.1 yr
Residential Informal	1,273	41	₦51m	₦51m	23%	4.6 yr
Kiosk Shop	1,045	526	₦77.5m	₦77.5m	35%	3.1 yr
Commercial	558	336	₦438m	₦438m	57%	1.9 yr
Institutional	323	298	₦1.14bn	₦1.13bn	55%	1.9 yr
Apartment	258	9	₦6.99m	₦6.99m	23%	4.6 yr
Commercial Corridor	221	97	₦251m	₦251m	35%	3.1 yr
Educational Facility	132	126	₦356m	₦356m	83%	1.4 yr
Healthcare Facility	112	103	₦809m	₦777m	49%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	109,987	10,361	₦10.8bn	₦10.7bn

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	108,759	9,503	₦7.95bn	₦7.94bn	11%	8.4 yr
SME High	779	433	₦690m	₦690m	39%	2.6 yr
Enterprise	449	425	₦2.15bn	₦2.11bn	61%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	44,978	2,325	₦275m	₦275m
3.0	29,861	4,597	₦8.31bn	₦8.26bn
2.0	22,022	2,102	₦1.28bn	₦1.28bn
1.0	8,047	1,086	₦262m	₦260m
4.0	4,822	194	₦477m	₦477m
5.0	243	50	₦152m	₦152m
6.0	14	7	₦39.4m	₦39.4m