Ebonyi State

Rooftop solar in Abakaliki, Ebonyi: what the roofs are worth

Abakaliki has 87,510 buildings with a viable rooftop and 1.67 GWp of roof capacity. 16% run a generator, and together they spend ₦28bn a year on energy.

Viable buildings

87,510

Usable roof area

7.45 km²

1.67 GWp roof capacity

Energy spend

₦28bn/yr

25.5 GWh/yr burned on generators

Median payback

5.9 yr

Median IRR 17% (cash saved)

The savings bracket for Abakaliki

Approach B

Cash saved

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

Current energy spend₦28bn/yr

Year-one cash saved₦27.6bn

Lifetime cash saved₦1.51tn

NPV₦215bn

Median IRR17%

Median payback5.9 yr

Unlocked energy33.7 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity176 MWp

Capex₦160bn

Year-one energy value₦108bn

Lifetime energy value₦5.03tn

NPV₦812bn

Median IRR85%

Median payback1.1 yr

Three ways to size Abakaliki'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: 176 MWp
Capital cost: ₦160bn
Year 1 savings: ₦108bn/yr
NPV: ₦812bn
Median IRR: 85%
Median payback: 1.1 yr

The odds a rooftop in Abakaliki pays back quickly

Of the 82,637 buildings in Abakaliki with a modelled payback, 41.0% pay back inside five years and 15.8% inside three.

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How much of Abakaliki's demand actually gets met

Buildings in Abakaliki consume 68 GWh/yr but want 102 GWh/yr. The 33% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Abakaliki

Loading band economics…

How many rooftops in Abakaliki 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 82,637 buildings with a modelled result out of 87,510 in Abakaliki. 49,883 clear a positive NPV.

Payback

Under 3 years13,087 (16%)

Under 5 years33,870 (41%)

Under 7 years49,736 (60%)

Under 10 years60,672 (73%)

Return (IRR)

Above 10%58,827 (67%)

Above 15%49,883 (57%)

Above 20%38,101 (44%)

Above 25%27,202 (31%)

CO₂ avoided

55.8 kt/yr

Fuel avoided

9.17 million litres/yr

Energy unlocked

33.7 GWh/yr

Demand that is suppressed today

People served

152k

What hardware costs right now

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

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 Abakaliki

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
A	23,690	3,474	₦15.8bn	₦15.6bn	19%	4.6 yr
D	18,996	2,309	₦2.11bn	₦2.11bn	15%	6.9 yr
E	18,212	1,940	₦3.08bn	₦3.08bn	15%	7.1 yr
B	14,775	3,963	₦5.03bn	₦4.81bn	23%	4.6 yr
C	11,837	1,897	₦1.94bn	₦1.94bn	17%	6.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	80,296	10,049	₦6.43bn	₦6.42bn	17%	6.1 yr
Commercial General	3,617	1,883	₦11.7bn	₦11.5bn	37%	2.9 yr
Commercial Retail	1,434	739	₦224m	₦224m	37%	2.9 yr
Anchor	949	413	₦7.63bn	₦7.41bn	43%	2.6 yr
Industrial	864	338	₦1.66bn	₦1.64bn	37%	2.9 yr
Worship	239	132	₦134m	₦134m	43%	2.6 yr
Filling Station	50	18	₦73.1m	₦73m	35%	3.1 yr
Hospitality	32	7	₦146m	₦136m	33%	3.1 yr
Mall Retail	21	2	₦27.8m	₦27.8m	35%	3.1 yr
Productive Use	7	1	₦2.19m	₦2.19m	33%	3.1 yr
Automotive	1	1	₦585k	₦585k	51%	2.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
50 100m2	26,075	3,228	₦1.62bn	₦1.62bn	17%	6.1 yr
100 250m2	20,391	3,834	₦5.95bn	₦5.95bn	25%	4.4 yr
Under 30m2	19,788	2,978	₦468m	₦454m	5%	14.9 yr
30 50m2	13,865	1,732	₦424m	₦424m	9%	9.9 yr
250 1000m2	7,167	1,741	₦12.3bn	₦12.2bn	25%	4.4 yr
Over 1000m2	224	70	₦7.21bn	₦6.94bn	31%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	44,223	6,392	₦7bn	₦7bn	17%	6.6 yr
Urban Centre	32,570	5,859	₦18bn	₦17.6bn	21%	4.6 yr
Unclassified	7,511	731	₦1.89bn	₦1.89bn	17%	6.1 yr
Dense Urban	3,206	601	₦1.07bn	₦1.07bn	19%	5.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	28,747	4,204	₦996m	₦994m	17%	6.1 yr
Shed	18,979	1,896	₦228m	₦228m	7%	14.4 yr
Residential	13,677	3,152	₦4.81bn	₦4.8bn	25%	4.4 yr
Residential Informal	13,208	577	₦292m	₦292m	15%	5.6 yr
Residential Formal	5,235	130	₦54.1m	₦52.7m	9%	7.4 yr
Institutional	1,478	600	₦7.8bn	₦7.59bn	31%	3.6 yr
Kiosk Shop	1,436	740	₦219m	₦219m	37%	2.9 yr
Commercial	954	572	₦7.43bn	₦7.29bn	43%	2.4 yr
Commercial Corridor	935	517	₦1.79bn	₦1.79bn	39%	2.9 yr
Industrial Site	820	324	₦1.59bn	₦1.57bn	37%	2.9 yr
Agricultural	450	90	₦54.4m	₦54.4m	29%	3.9 yr
Educational Facility	322	167	₦484m	₦484m	45%	2.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	87,192	13,543	₦23.5bn	₦23.2bn
Commercial	318	40	₦4.43bn	₦4.34bn

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	83,721	11,720	₦9.3bn	₦9.28bn	17%	6.1 yr
SME High	1,984	1,115	₦9.4bn	₦9.26bn	41%	2.6 yr
Enterprise	1,805	748	₦9.28bn	₦9.04bn	41%	2.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	32,052	4,701	₦1.72bn	₦1.72bn
0.0	19,114	1,947	₦246m	₦246m
3.0	15,262	4,110	₦12.5bn	₦12.3bn
1.0	14,242	1,871	₦352m	₦352m
4.0	6,027	571	₦5.64bn	₦5.63bn
5.0	601	303	₦4.9bn	₦4.81bn
6.0	212	80	₦2.6bn	₦2.54bn