Enugu State

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

Enugu East has 124,245 buildings with a viable rooftop and 3.05 GWp of roof capacity. 23% run a generator, and together they spend ₦52.8bn a year on energy.

Viable buildings

124,245

Usable roof area

13.5 km²

3.05 GWp roof capacity

Energy spend

₦52.8bn/yr

34.8 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Enugu East

Approach B

Cash saved

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

Current energy spend₦52.8bn/yr

Year-one cash saved₦52.1bn

Lifetime cash saved₦2.98tn

NPV₦413bn

Median IRR25%

Median payback4.4 yr

Unlocked energy75.1 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity307 MWp

Capex₦292bn

Year-one energy value₦186bn

Lifetime energy value₦8.74tn

NPV₦1.39tn

Median IRR67%

Median payback1.6 yr

Three ways to size Enugu East'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: 307 MWp
Capital cost: ₦292bn
Year 1 savings: ₦186bn/yr
NPV: ₦1.39tn
Median IRR: 67%
Median payback: 1.6 yr

The odds a rooftop in Enugu East pays back quickly

Of the 120,708 buildings in Enugu East with a modelled payback, 64.1% pay back inside five years and 17.9% inside three.

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How much of Enugu East's demand actually gets met

Buildings in Enugu East consume 128 GWh/yr but want 203 GWh/yr. The 37% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Enugu East

Loading band economics…

How many rooftops in Enugu East 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 120,708 buildings with a modelled result out of 124,245 in Enugu East. 95,998 clear a positive NPV.

Payback

Under 3 years21,631 (18%)

Under 5 years77,315 (64%)

Under 7 years95,856 (79%)

Under 10 years107,507 (89%)

Return (IRR)

Above 10%105,937 (85%)

Above 15%95,998 (77%)

Above 20%82,632 (67%)

Above 25%67,157 (54%)

CO₂ avoided

118 kt/yr

Fuel avoided

19.3 million litres/yr

Energy unlocked

75.1 GWh/yr

Demand that is suppressed today

People served

397k

What hardware costs right now

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

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 East

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
A	93,650	17,264	₦29.3bn	₦29bn	25%	4.4 yr
B	15,380	8,546	₦12.9bn	₦12.9bn	35%	3.1 yr
D	5,668	1,032	₦2.62bn	₦2.62bn	19%	5.4 yr
C	4,841	1,280	₦4.91bn	₦4.77bn	23%	4.6 yr
E	4,706	949	₦3.1bn	₦2.8bn	19%	5.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	116,367	27,534	₦32.7bn	₦32.1bn	25%	4.4 yr
Commercial General	4,032	714	₦8.95bn	₦8.88bn	35%	3.1 yr
Commercial Retail	2,174	374	₦170m	₦170m	33%	3.4 yr
Anchor	886	173	₦9.75bn	₦9.72bn	41%	2.6 yr
Industrial	437	202	₦823m	₦822m	37%	2.9 yr
Worship	222	55	₦131m	₦131m	33%	3.1 yr
Hospitality	70	11	₦224m	₦216m	33%	3.1 yr
Filling Station	29	7	₦22.1m	₦22.1m	35%	3.1 yr
Mall Retail	19	0	₦17.5m	₦17.4m	33%	3.1 yr
Productive Use	6	0	₦2.89m	₦2.89m	33%	3.1 yr
Automotive	3	1	₦15m	₦15m	31%	3.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	34,978	8,628	₦12bn	₦11.8bn	25%	4.4 yr
Under 30m2	29,282	6,468	₦615m	₦613m	13%	7.1 yr
50 100m2	23,826	5,217	₦2.19bn	₦2.13bn	23%	4.6 yr
250 1000m2	18,904	4,859	₦24.4bn	₦24bn	27%	4.1 yr
30 50m2	16,869	3,727	₦663m	₦660m	19%	5.9 yr
Over 1000m2	386	172	₦13bn	₦12.9bn	33%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	98,090	20,624	₦31.9bn	₦31.7bn	25%	4.4 yr
Urban	16,038	5,910	₦12.3bn	₦12.2bn	25%	4.4 yr
Unclassified	7,918	2,025	₦6.61bn	₦6.53bn	25%	4.4 yr
Rural	2,199	512	₦1.95bn	₦1.66bn	23%	4.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Informal	40,120	7,017	₦4.39bn	₦4.39bn	25%	4.4 yr
Residential Formal	35,924	4,737	₦2.77bn	₦2.77bn	23%	4.4 yr
Residential	13,636	6,045	₦22.9bn	₦22.4bn	27%	4.1 yr
Shed	13,446	4,674	₦458m	₦458m	19%	5.6 yr
Residential Small	13,083	5,006	₦2.15bn	₦2.1bn	25%	4.4 yr
Kiosk Shop	2,170	374	₦168m	₦168m	33%	3.4 yr
Commercial Corridor	1,565	307	₦4.17bn	₦4.16bn	35%	3.1 yr
Commercial	954	44	₦2.09bn	₦2.05bn	35%	3.1 yr
Institutional	792	270	₦9.74bn	₦9.73bn	31%	3.6 yr
Unknown	769	140	₦1.37bn	₦1.37bn	31%	3.6 yr
Industrial Site	296	150	₦545m	₦544m	39%	2.9 yr
Educational Facility	254	54	₦248m	₦248m	43%	2.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	124,024	29,009	₦52bn	₦51.4bn
Industrial	185	30	₦680m	₦680m
Farmyard	36	32	₦88.2m	₦88.2m

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	120,381	28,368	₦35.9bn	₦35.4bn	25%	4.4 yr
SME High	2,617	365	₦6.46bn	₦6.4bn	35%	3.1 yr
Enterprise	1,247	338	₦10.4bn	₦10.4bn	41%	2.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	35,474	8,772	₦4.6bn	₦4.41bn
3.0	34,100	9,291	₦29.7bn	₦29.3bn
4.0	29,948	4,145	₦12.2bn	₦12.1bn
0.0	13,263	4,684	₦454m	₦454m
1.0	9,782	2,083	₦429m	₦429m
5.0	1,214	66	₦2.59bn	₦2.59bn
6.0	464	30	₦2.89bn	₦2.83bn