Enugu State

Rooftop solar in Enugu South, Enugu: what the roofs are worth

Enugu South has 74,711 buildings with a viable rooftop and 1.79 GWp of roof capacity. 23% run a generator, and together they spend ₦25.6bn a year on energy.

Viable buildings

74,711

Usable roof area

7.95 km²

1.79 GWp roof capacity

Energy spend

₦25.6bn/yr

14.5 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Enugu South

Approach B

Cash saved

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

Current energy spend₦25.6bn/yr

Year-one cash saved₦25.5bn

Lifetime cash saved₦1.53tn

NPV₦201bn

Median IRR25%

Median payback4.4 yr

Unlocked energy45.6 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity181 MWp

Capex₦169bn

Year-one energy value₦102bn

Lifetime energy value₦4.77tn

NPV₦750bn

Median IRR65%

Median payback1.6 yr

Three ways to size Enugu South'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: 181 MWp
Capital cost: ₦169bn
Year 1 savings: ₦102bn/yr
NPV: ₦750bn
Median IRR: 65%
Median payback: 1.6 yr

The odds a rooftop in Enugu South pays back quickly

Of the 74,218 buildings in Enugu South with a modelled payback, 70.0% pay back inside five years and 16.6% inside three.

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How much of Enugu South's demand actually gets met

Buildings in Enugu South consume 72.7 GWh/yr but want 118 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 Enugu South

Loading band economics…

How many rooftops in Enugu South 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 74,218 buildings with a modelled result out of 74,711 in Enugu South. 64,790 clear a positive NPV.

Payback

Under 3 years12,353 (17%)

Under 5 years51,975 (70%)

Under 7 years64,711 (87%)

Under 10 years70,515 (95%)

Return (IRR)

Above 10%69,929 (94%)

Above 15%64,790 (87%)

Above 20%55,624 (74%)

Above 25%45,224 (61%)

CO₂ avoided

63.1 kt/yr

Fuel avoided

7.7 million litres/yr

Energy unlocked

45.6 GWh/yr

Demand that is suppressed today

People served

209k

What hardware costs right now

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

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 Enugu South

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
A	66,041	12,996	₦19.2bn	₦19.2bn	25%	4.4 yr
B	7,377	4,367	₦6.17bn	₦6.12bn	31%	3.4 yr
C	1,159	165	₦121m	₦121m	25%	4.4 yr
D	75	8	₦36.8m	₦36.8m	23%	4.4 yr
E	59	0	₦2.88m	₦2.88m	5%	14.9 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	67,292	15,972	₦14.1bn	₦14.1bn	25%	4.4 yr
Commercial General	3,726	898	₦7.74bn	₦7.74bn	35%	3.1 yr
Commercial Retail	2,428	412	₦202m	₦202m	33%	3.4 yr
Anchor	730	131	₦2.61bn	₦2.56bn	41%	2.6 yr
Industrial	255	93	₦577m	₦574m	37%	2.9 yr
Worship	160	16	₦61.1m	₦61.1m	33%	3.1 yr
Hospitality	67	5	₦204m	₦204m	33%	3.1 yr
Filling Station	34	7	₦24.3m	₦24.3m	35%	3.1 yr
Productive Use	12	1	₦11.3m	₦11.3m	35%	3.1 yr
Mall Retail	7	1	₦763k	₦763k	33%	3.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	20,466	5,325	₦7.95bn	₦7.95bn	25%	4.4 yr
Under 30m2	17,275	3,737	₦402m	₦399m	17%	6.4 yr
50 100m2	14,436	3,423	₦1.43bn	₦1.43bn	25%	4.4 yr
250 1000m2	11,794	2,737	₦13.4bn	₦13.4bn	27%	4.1 yr
30 50m2	10,589	2,286	₦452m	₦450m	21%	5.4 yr
Over 1000m2	151	28	₦1.89bn	₦1.89bn	27%	4.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	67,834	15,012	₦22bn	₦22bn	25%	4.4 yr
Urban	3,672	1,818	₦2.21bn	₦2.21bn	33%	3.4 yr
Unclassified	3,200	705	₦1.33bn	₦1.33bn	25%	4.4 yr
Rural	5	1	₦3.65m	₦3.65m	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Informal	22,561	2,861	₦2.14bn	₦2.14bn	25%	4.4 yr
Residential Formal	20,830	3,928	₦1.95bn	₦1.95bn	25%	4.4 yr
Residential Small	8,695	3,363	₦1.31bn	₦1.31bn	25%	4.4 yr
Residential	7,808	3,212	₦8.5bn	₦8.5bn	27%	4.1 yr
Shed	7,334	2,584	₦232m	₦232m	21%	5.4 yr
Kiosk Shop	2,426	411	₦201m	₦201m	33%	3.4 yr
Commercial Corridor	1,383	183	₦2.07bn	₦2.07bn	35%	3.1 yr
Commercial	1,375	567	₦4.41bn	₦4.41bn	35%	3.1 yr
Institutional	482	118	₦1.92bn	₦1.92bn	31%	3.6 yr
Unknown	386	31	₦412m	₦412m	31%	3.6 yr
Educational Facility	239	47	₦324m	₦324m	43%	2.4 yr
School	230	47	₦152m	₦152m	41%	2.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	74,667	17,535	₦25.5bn	₦25.4bn
Industrial	36	1	₦65.3m	₦65.3m
Farmland	7	0	₦327k	₦327k
Commercial	1	0	₦20.5k	₦20.5k

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	70,958	16,583	₦16bn	₦16bn	25%	4.4 yr
SME High	2,846	759	₦6.57bn	₦6.57bn	35%	3.1 yr
Enterprise	907	194	₦3.02bn	₦2.97bn	41%	2.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	21,994	4,922	₦1.97bn	₦1.97bn
3.0	20,728	5,371	₦12.3bn	₦12.3bn
4.0	18,215	3,405	₦7.18bn	₦7.18bn
0.0	7,037	2,590	₦230m	₦230m
1.0	5,374	995	₦166m	₦166m
5.0	1,005	196	₦1.96bn	₦1.96bn
6.0	358	57	₦1.72bn	₦1.72bn