Imo State

Rooftop solar in Oru East, Imo: what the roofs are worth

Oru East has 57,424 buildings with a viable rooftop and 1.31 GWp of roof capacity. 44% run a generator, and together they spend ₦16.3bn a year on energy.

Viable buildings

57,424

Usable roof area

5.83 km²

1.31 GWp roof capacity

Energy spend

₦16.3bn/yr

15.4 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Oru East

Approach B

Cash saved

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

Current energy spend₦16.3bn/yr

Year-one cash saved₦16.2bn

Lifetime cash saved₦858bn

NPV₦132bn

Median IRR25%

Median payback4.4 yr

Unlocked energy16.2 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity71.6 MWp

Capex₦70.3bn

Year-one energy value₦57.6bn

Lifetime energy value₦2.74tn

NPV₦456bn

Median IRR97%

Median payback1.1 yr

Three ways to size Oru 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: 71.6 MWp
Capital cost: ₦70.3bn
Year 1 savings: ₦57.6bn/yr
NPV: ₦456bn
Median IRR: 97%
Median payback: 1.1 yr

The odds a rooftop in Oru East pays back quickly

Of the 57,044 buildings in Oru East with a modelled payback, 60.7% pay back inside five years and 43.0% inside three.

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How much of Oru East's demand actually gets met

Buildings in Oru East consume 26.4 GWh/yr but want 42.6 GWh/yr. The 38% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Oru East

Loading band economics…

How many rooftops in Oru 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 57,044 buildings with a modelled result out of 57,424 in Oru East. 40,552 clear a positive NPV.

Payback

Under 3 years24,554 (43%)

Under 5 years34,607 (61%)

Under 7 years40,463 (71%)

Under 10 years47,834 (84%)

Return (IRR)

Above 10%46,215 (80%)

Above 15%40,552 (71%)

Above 20%36,345 (63%)

Above 25%25,672 (45%)

CO₂ avoided

30.8 kt/yr

Fuel avoided

7.92 million litres/yr

Energy unlocked

16.2 GWh/yr

Demand that is suppressed today

People served

107k

What hardware costs right now

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

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	23,748	9,532	₦6.18bn	₦6.15bn	25%	4.4 yr
E	19,294	9,009	₦4.16bn	₦4.16bn	25%	4.4 yr
C	12,676	5,385	₦2.79bn	₦2.79bn	25%	4.4 yr
B	1,587	1,033	₦2.35bn	₦2.35bn	35%	2.9 yr
A	119	118	₦786m	₦786m	59%	1.9 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	55,823	23,911	₦9.95bn	₦9.93bn	25%	4.4 yr
Commercial General	848	591	₦2.8bn	₦2.8bn	43%	2.4 yr
Commercial Retail	359	236	₦55.6m	₦55.6m	41%	2.6 yr
Anchor	278	247	₦3.1bn	₦3.09bn	63%	1.6 yr
Industrial	60	46	₦297m	₦297m	67%	1.6 yr
Worship	34	28	₦31.6m	₦31.6m	59%	1.9 yr
Filling Station	14	12	₦20.2m	₦20.2m	63%	1.6 yr
Hospitality	8	6	₦13.3m	₦13.3m	47%	1.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	20,788	8,858	₦5.4bn	₦5.4bn	25%	4.4 yr
50 100m2	12,468	5,344	₦913m	₦893m	17%	5.9 yr
Under 30m2	10,419	4,528	₦349m	₦348m	9%	12.6 yr
30 50m2	7,479	3,373	₦368m	₦368m	13%	7.9 yr
250 1000m2	6,192	2,909	₦6.52bn	₦6.51bn	25%	4.4 yr
Over 1000m2	78	65	₦2.72bn	₦2.72bn	71%	1.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	52,780	23,100	₦14.4bn	₦14.4bn	25%	4.4 yr
Unclassified	2,651	1,009	₦674m	₦674m	23%	4.9 yr
Urban	1,993	968	₦1.22bn	₦1.22bn	33%	3.1 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	20,854	9,256	₦1.22bn	₦1.2bn	19%	5.4 yr
Residential	20,703	8,974	₦8.21bn	₦8.21bn	25%	4.4 yr
Shed	13,336	5,300	₦460m	₦460m	9%	9.6 yr
Residential Formal	750	302	₦46.5m	₦46.5m	25%	4.4 yr
Commercial	522	396	₦1.79bn	₦1.79bn	43%	2.6 yr
Kiosk Shop	359	236	₦55.6m	₦55.6m	41%	2.6 yr
Institutional	202	173	₦2.59bn	₦2.59bn	57%	1.9 yr
Commercial Corridor	116	16	₦155m	₦155m	33%	3.1 yr
Educational Facility	90	81	₦556m	₦556m	83%	1.4 yr
Apartment	90	45	₦6.75m	₦6.75m	25%	2.4 yr
School	70	61	₦127m	₦127m	79%	1.4 yr
Healthcare Facility	52	46	₦462m	₦455m	53%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	57,246	24,899	₦15.1bn	₦15bn
Industrial	178	178	₦1.21bn	₦1.21bn

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	56,440	24,364	₦11bn	₦10.9bn	25%	4.4 yr
SME High	657	428	₦1.97bn	₦1.97bn	41%	2.6 yr
Enterprise	327	285	₦3.35bn	₦3.34bn	65%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	33,968	14,905	₦12.9bn	₦12.9bn
0.0	13,318	5,282	₦462m	₦462m
2.0	7,861	3,653	₦549m	₦549m
4.0	1,183	539	₦474m	₦474m
1.0	525	331	₦26.1m	₦25.8m
5.0	438	288	₦794m	₦794m
6.0	131	79	₦1.04bn	₦1.04bn