Enugu State

Rooftop solar in Uzo-Uwani, Enugu: what the roofs are worth

Uzo-Uwani has 35,882 buildings with a viable rooftop and 587 MWp of roof capacity. 33% run a generator, and together they spend ₦29.1bn a year on energy.

Viable buildings

35,882

Usable roof area

2.62 km²

587 MWp roof capacity

Energy spend

₦29.1bn/yr

26.6 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Uzo-Uwani

Approach B

Cash saved

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

Current energy spend₦29.1bn/yr

Year-one cash saved₦27.6bn

Lifetime cash saved₦1.39tn

NPV₦225bn

Median IRR25%

Median payback4.4 yr

Unlocked energy18.7 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity92.4 MWp

Capex₦96.4bn

Year-one energy value₦89.9bn

Lifetime energy value₦4.26tn

NPV₦723bn

Median IRR99%

Median payback1.1 yr

Three ways to size Uzo-Uwani'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: 92.4 MWp
Capital cost: ₦96.4bn
Year 1 savings: ₦89.9bn/yr
NPV: ₦723bn
Median IRR: 99%
Median payback: 1.1 yr

The odds a rooftop in Uzo-Uwani pays back quickly

Of the 35,564 buildings in Uzo-Uwani with a modelled payback, 61.3% pay back inside five years and 33.4% inside three.

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How much of Uzo-Uwani's demand actually gets met

Buildings in Uzo-Uwani consume 35.5 GWh/yr but want 54.2 GWh/yr. The 34% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Uzo-Uwani

Loading band economics…

How many rooftops in Uzo-Uwani 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 35,564 buildings with a modelled result out of 35,882 in Uzo-Uwani. 25,453 clear a positive NPV.

Payback

Under 3 years11,865 (33%)

Under 5 years21,789 (61%)

Under 7 years25,428 (71%)

Under 10 years27,696 (78%)

Return (IRR)

Above 10%27,009 (75%)

Above 15%25,453 (71%)

Above 20%23,115 (64%)

Above 25%15,938 (44%)

CO₂ avoided

48.8 kt/yr

Fuel avoided

15.8 million litres/yr

Energy unlocked

18.7 GWh/yr

Demand that is suppressed today

People served

244k

What hardware costs right now

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

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 Uzo-Uwani

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	16,740	5,936	₦14.7bn	₦14bn	25%	4.4 yr
E	12,612	3,939	₦10.3bn	₦9.6bn	25%	4.4 yr
C	6,530	2,024	₦4.11bn	₦3.97bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	35,149	11,204	₦25.2bn	₦23.8bn	25%	4.4 yr
Anchor	325	318	₦2.15bn	₦2.1bn	77%	1.4 yr
Commercial General	278	262	₦1.16bn	₦1.16bn	57%	1.9 yr
Industrial	112	105	₦596m	₦595m	71%	1.4 yr
Commercial Retail	9	1	₦600k	₦600k	23%	4.9 yr
Worship	6	6	₦3.99m	₦3.99m	63%	1.6 yr
Filling Station	3	3	₦5.05m	₦5.05m	67%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	10,067	3,959	₦14.1bn	₦13.1bn	25%	4.4 yr
50 100m2	9,819	2,962	₦2.6bn	₦2.59bn	25%	4.4 yr
Under 30m2	8,525	2,377	₦313m	₦312m	7%	14.6 yr
30 50m2	5,801	1,664	₦578m	₦558m	11%	8.9 yr
250 1000m2	1,652	925	₦10.8bn	₦10.4bn	55%	1.9 yr
Over 1000m2	18	12	₦669m	₦658m	65%	1.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	14,165	5,464	₦12.9bn	₦12.6bn	25%	4.4 yr
Dense Urban	10,775	3,714	₦5.79bn	₦5.79bn	25%	4.4 yr
Unclassified	5,837	1,105	₦4.55bn	₦3.96bn	13%	6.9 yr
Rural	5,105	1,616	₦5.8bn	₦5.26bn	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	14,443	4,585	₦3.92bn	₦3.87bn	25%	4.4 yr
Shed	10,275	2,252	₦236m	₦236m	7%	14.1 yr
Residential	8,548	3,287	₦20.2bn	₦18.8bn	25%	4.4 yr
Residential Formal	1,850	1,066	₦790m	₦790m	47%	2.4 yr
Institutional	259	247	₦1.19bn	₦1.19bn	57%	1.9 yr
Educational Facility	127	125	₦642m	₦642m	83%	1.4 yr
Industrial Site	89	82	₦505m	₦505m	71%	1.4 yr
School	67	67	₦223m	₦223m	83%	1.4 yr
Healthcare Facility	56	54	₦643m	₦638m	53%	2.1 yr
Clinic	44	42	₦297m	₦244m	53%	2.1 yr
Agricultural	33	14	₦10.1m	₦10.1m	29%	3.9 yr
Market	21	21	₦16.6m	₦16.6m	65%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	35,882	11,899	₦29.1bn	₦27.6bn

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	35,421	11,455	₦26.1bn	₦24.7bn	25%	4.4 yr
Enterprise	437	423	₦2.75bn	₦2.69bn	73%	1.4 yr
SME High	24	21	₦241m	₦241m	67%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	11,966	4,110	₦5.8bn	₦5.45bn
0.0	10,306	2,265	₦246m	₦246m
3.0	9,534	3,742	₦21.3bn	₦20.2bn
1.0	2,699	981	₦592m	₦591m
4.0	1,375	799	₦1.11bn	₦1.11bn
5.0	2	2	₦41.4m	₦41.4m