Enugu State

Rooftop solar in Igbo-Eze North, Enugu: what the roofs are worth

Igbo-Eze North has 116,231 buildings with a viable rooftop and 1.8 GWp of roof capacity. 16% run a generator, and together they spend ₦14.9bn a year on energy.

Viable buildings

116,231

Usable roof area

8.06 km²

1.8 GWp roof capacity

Energy spend

₦14.9bn/yr

13.4 GWh/yr burned on generators

Median payback

6.1 yr

Median IRR 17% (cash saved)

The savings bracket for Igbo-Eze North

Approach B

Cash saved

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

Current energy spend₦14.9bn/yr

Year-one cash saved₦14.9bn

Lifetime cash saved₦791bn

NPV₦119bn

Median IRR17%

Median payback6.1 yr

Unlocked energy16.6 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity103 MWp

Capex₦109bn

Year-one energy value₦99.1bn

Lifetime energy value₦4.74tn

NPV₦800bn

Median IRR101%

Median payback1.1 yr

Three ways to size Igbo-Eze North'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: 103 MWp
Capital cost: ₦109bn
Year 1 savings: ₦99.1bn/yr
NPV: ₦800bn
Median IRR: 101%
Median payback: 1.1 yr

The odds a rooftop in Igbo-Eze North pays back quickly

Of the 114,861 buildings in Igbo-Eze North with a modelled payback, 39.4% pay back inside five years and 16.2% inside three.

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How much of Igbo-Eze North's demand actually gets met

Buildings in Igbo-Eze North consume 24.1 GWh/yr but want 40.7 GWh/yr. The 41% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Igbo-Eze North

Loading band economics…

How many rooftops in Igbo-Eze North 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 114,861 buildings with a modelled result out of 116,231 in Igbo-Eze North. 66,169 clear a positive NPV.

Payback

Under 3 years18,635 (16%)

Under 5 years45,230 (39%)

Under 7 years66,024 (57%)

Under 10 years80,852 (70%)

Return (IRR)

Above 10%77,619 (67%)

Above 15%66,169 (57%)

Above 20%50,353 (43%)

Above 25%37,689 (32%)

CO₂ avoided

29.4 kt/yr

Fuel avoided

7.42 million litres/yr

Energy unlocked

16.6 GWh/yr

Demand that is suppressed today

People served

283k

What hardware costs right now

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

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 Igbo-Eze North

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	46,689	7,065	₦5.59bn	₦5.54bn	17%	6.4 yr
E	39,000	6,970	₦5.71bn	₦5.71bn	17%	6.1 yr
C	25,869	4,100	₦3.15bn	₦3.15bn	19%	5.9 yr
B	4,673	674	₦495m	₦495m	21%	5.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	114,616	17,431	₦11.1bn	₦11.1bn	17%	6.1 yr
Anchor	624	552	₦2.03bn	₦1.98bn	77%	1.4 yr
Commercial General	608	521	₦1.43bn	₦1.43bn	57%	1.9 yr
Industrial	161	140	₦228m	₦227m	67%	1.6 yr
Commercial Retail	97	62	₦13.2m	₦13.2m	57%	1.9 yr
Worship	73	65	₦93.8m	₦93.8m	61%	1.6 yr
Filling Station	51	38	₦37m	₦37m	55%	1.9 yr
Hospitality	1	0	₦78.5k	₦78.5k	27%	4.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	33,252	4,901	₦418m	₦417m	7%	15.4 yr
100 250m2	32,982	5,944	₦7.04bn	₦7.04bn	25%	4.4 yr
50 100m2	26,989	3,964	₦1.26bn	₦1.26bn	17%	6.1 yr
30 50m2	18,807	2,681	₦395m	₦395m	9%	9.9 yr
250 1000m2	4,177	1,306	₦5.29bn	₦5.25bn	25%	4.1 yr
Over 1000m2	24	13	₦533m	₦533m	63%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	85,053	13,522	₦10.2bn	₦10.2bn	17%	6.1 yr
Urban	21,369	3,665	₦3.72bn	₦3.72bn	19%	5.6 yr
Dense Urban	5,485	1,114	₦609m	₦609m	19%	5.9 yr
Unclassified	4,324	508	₦368m	₦368m	15%	6.9 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	46,212	8,578	₦9.58bn	₦9.58bn	25%	4.4 yr
Shed	39,675	4,504	₦385m	₦385m	7%	14.6 yr
Residential Small	25,248	4,303	₦1.04bn	₦1.04bn	17%	6.1 yr
Residential Informal	2,275	36	₦89.7m	₦89.7m	19%	5.4 yr
Residential Formal	1,141	0	₦13.1m	₦13.1m	13%	7.1 yr
Institutional	498	443	₦1.4bn	₦1.4bn	55%	1.9 yr
Educational Facility	253	235	₦785m	₦785m	81%	1.4 yr
School	203	189	₦310m	₦310m	79%	1.4 yr
Industrial Site	151	132	₦218m	₦217m	67%	1.6 yr
Kiosk Shop	97	62	₦13.2m	₦13.2m	57%	1.9 yr
Healthcare Facility	79	64	₦505m	₦505m	51%	2.1 yr
Commercial	77	54	₦143m	₦143m	67%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	116,224	18,806	₦14.9bn	₦14.9bn
Farmland	7	3	₦937k	₦937k

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	115,305	18,014	₦12.5bn	₦12.5bn	17%	6.1 yr
Enterprise	785	692	₦2.26bn	₦2.21bn	73%	1.4 yr
SME High	141	103	₦193m	₦193m	59%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	39,725	4,519	₦388m	₦388m
2.0	32,110	5,555	₦3.52bn	₦3.52bn
3.0	30,874	6,058	₦10.3bn	₦10.3bn
1.0	12,295	2,632	₦378m	₦378m
4.0	1,227	45	₦306m	₦306m