Enugu State

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

Aninri has 37,153 buildings with a viable rooftop and 783 MWp of roof capacity. 25% run a generator, and together they spend ₦16.9bn a year on energy.

Viable buildings

37,153

Usable roof area

3.49 km²

783 MWp roof capacity

Energy spend

₦16.9bn/yr

14.9 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Aninri

Approach B

Cash saved

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

Current energy spend₦16.9bn/yr

Year-one cash saved₦16.7bn

Lifetime cash saved₦867bn

NPV₦137bn

Median IRR25%

Median payback4.4 yr

Unlocked energy14.1 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₦86.4bn

Year-one energy value₦81.6bn

Lifetime energy value₦3.9tn

NPV₦661bn

Median IRR101%

Median payback1.1 yr

Three ways to size Aninri'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: ₦86.4bn
Year 1 savings: ₦81.6bn/yr
NPV: ₦661bn
Median IRR: 101%
Median payback: 1.1 yr

The odds a rooftop in Aninri pays back quickly

Of the 37,012 buildings in Aninri with a modelled payback, 62.1% pay back inside five years and 25.6% inside three.

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How much of Aninri's demand actually gets met

Buildings in Aninri consume 21.8 GWh/yr but want 35.9 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 Aninri

Loading band economics…

How many rooftops in Aninri 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 37,012 buildings with a modelled result out of 37,153 in Aninri. 30,010 clear a positive NPV.

Payback

Under 3 years9,477 (26%)

Under 5 years22,987 (62%)

Under 7 years29,962 (81%)

Under 10 years33,301 (90%)

Return (IRR)

Above 10%32,538 (88%)

Above 15%30,010 (81%)

Above 20%25,358 (68%)

Above 25%18,992 (51%)

CO₂ avoided

31.1 kt/yr

Fuel avoided

9.43 million litres/yr

Energy unlocked

14.1 GWh/yr

Demand that is suppressed today

People served

238k

What hardware costs right now

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

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 Aninri

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	16,901	3,604	₦6.83bn	₦6.82bn	25%	4.4 yr
E	16,272	4,762	₦8.02bn	₦7.86bn	25%	4.4 yr
C	3,980	1,103	₦2.03bn	₦2.03bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	36,666	9,003	₦15bn	₦14.9bn	25%	4.4 yr
Anchor	271	259	₦1.09bn	₦1.09bn	77%	1.4 yr
Commercial General	180	175	₦697m	₦697m	59%	1.9 yr
Industrial	29	26	₦65.3m	₦65.3m	69%	1.6 yr
Filling Station	5	4	₦6.44m	₦6.44m	63%	1.6 yr
Commercial Retail	2	2	₦445k	₦445k	61%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	14,705	3,795	₦9.23bn	₦9.06bn	25%	4.4 yr
50 100m2	12,269	2,889	₦2.14bn	₦2.14bn	21%	4.9 yr
30 50m2	4,341	1,045	₦266m	₦266m	11%	9.1 yr
Under 30m2	3,518	966	₦118m	₦118m	7%	13.9 yr
250 1000m2	2,297	765	₦4.79bn	₦4.79bn	25%	4.1 yr
Over 1000m2	23	9	₦340m	₦340m	27%	4.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Dense Urban	13,382	3,110	₦4.86bn	₦4.86bn	25%	4.6 yr
Urban	9,105	3,657	₦7.32bn	₦7.31bn	25%	4.4 yr
Urban Centre	7,982	1,459	₦2.37bn	₦2.37bn	25%	4.4 yr
Unclassified	6,684	1,243	₦2.34bn	₦2.19bn	23%	4.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	19,089	4,506	₦3.55bn	₦3.55bn	23%	4.9 yr
Residential	11,850	3,114	₦11.3bn	₦11.2bn	25%	4.4 yr
Shed	5,725	1,382	₦145m	₦145m	9%	12.9 yr
Institutional	142	136	₦704m	₦704m	57%	1.9 yr
Educational Facility	126	119	₦378m	₦378m	81%	1.4 yr
School	57	55	₦87.6m	₦87.6m	81%	1.4 yr
Commercial	40	40	₦203m	₦203m	65%	1.6 yr
Healthcare Facility	32	31	₦285m	₦285m	51%	2.1 yr
Industrial Site	27	24	₦64.8m	₦64.8m	69%	1.6 yr
Public Building	16	16	₦34.1m	₦34.1m	55%	1.9 yr
Clinic	13	13	₦60.1m	₦60.1m	51%	2.1 yr
Market	10	10	₦12.5m	₦12.5m	65%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	37,153	9,469	₦16.9bn	₦16.7bn

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	36,808	9,140	₦15.5bn	₦15.3bn	25%	4.4 yr
Enterprise	300	285	₦1.16bn	₦1.16bn	75%	1.4 yr
SME High	45	44	₦210m	₦210m	65%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	18,994	4,590	₦4.26bn	₦4.11bn
3.0	11,485	3,213	₦12.2bn	₦12.2bn
0.0	5,727	1,383	₦146m	₦146m
1.0	922	258	₦114m	₦114m
4.0	25	25	₦155m	₦155m