Imo State

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

Oru West has 64,792 buildings with a viable rooftop and 1.56 GWp of roof capacity. 57% run a generator, and together they spend ₦37.3bn a year on energy.

Viable buildings

64,792

Usable roof area

6.94 km²

1.56 GWp roof capacity

Energy spend

₦37.3bn/yr

36.9 GWh/yr burned on generators

Median payback

1.9 yr

Median IRR 53% (cash saved)

The savings bracket for Oru West

Approach B

Cash saved

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

Current energy spend₦37.3bn/yr

Year-one cash saved₦37.2bn

Lifetime cash saved₦1.91tn

NPV₦301bn

Median IRR53%

Median payback1.9 yr

Unlocked energy27.2 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity118 MWp

Capex₦117bn

Year-one energy value₦99.2bn

Lifetime energy value₦4.7tn

NPV₦788bn

Median IRR97%

Median payback1.1 yr

Three ways to size Oru West'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: 118 MWp
Capital cost: ₦117bn
Year 1 savings: ₦99.2bn/yr
NPV: ₦788bn
Median IRR: 97%
Median payback: 1.1 yr

The odds a rooftop in Oru West pays back quickly

Of the 64,370 buildings in Oru West with a modelled payback, 72.8% pay back inside five years and 56.6% inside three.

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How much of Oru West's demand actually gets met

Buildings in Oru West consume 51.8 GWh/yr but want 79 GWh/yr. The 34% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Oru West

Loading band economics…

How many rooftops in Oru West 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 64,370 buildings with a modelled result out of 64,792 in Oru West. 52,225 clear a positive NPV.

Payback

Under 3 years36,411 (57%)

Under 5 years46,870 (73%)

Under 7 years52,163 (81%)

Under 10 years57,420 (89%)

Return (IRR)

Above 10%56,293 (87%)

Above 15%52,225 (81%)

Above 20%48,374 (75%)

Above 25%37,791 (58%)

CO₂ avoided

65.1 kt/yr

Fuel avoided

19.7 million litres/yr

Energy unlocked

27.2 GWh/yr

Demand that is suppressed today

People served

169k

What hardware costs right now

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

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 West

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	28,791	16,459	₦16.2bn	₦16.1bn	55%	1.9 yr
E	22,691	12,381	₦12.8bn	₦12.7bn	49%	2.1 yr
C	13,189	7,944	₦8.34bn	₦8.31bn	59%	1.9 yr
B	121	112	₦63.4m	₦63.4m	47%	2.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	62,529	34,929	₦25.2bn	₦25.2bn	55%	1.9 yr
Commercial General	1,199	1,023	₦4.51bn	₦4.5bn	49%	2.1 yr
Commercial Retail	513	449	₦92.3m	₦92.3m	47%	2.4 yr
Anchor	401	361	₦6.57bn	₦6.52bn	65%	1.6 yr
Industrial	128	114	₦763m	₦763m	69%	1.4 yr
Filling Station	10	10	₦16.2m	₦16.2m	65%	1.6 yr
Worship	10	8	₦125m	₦125m	57%	1.6 yr
Hospitality	2	2	₦22m	₦22m	53%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	23,916	13,613	₦13.5bn	₦13.5bn	61%	1.6 yr
50 100m2	12,558	7,051	₦1.82bn	₦1.8bn	55%	1.9 yr
Under 30m2	12,348	6,930	₦567m	₦565m	41%	2.4 yr
250 1000m2	8,053	4,846	₦15.3bn	₦15.2bn	61%	1.6 yr
30 50m2	7,834	4,390	₦579m	₦579m	51%	2.1 yr
Over 1000m2	83	66	₦5.56bn	₦5.56bn	71%	1.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	59,424	33,814	₦32.6bn	₦32.5bn	53%	1.9 yr
Unclassified	2,782	1,545	₦2.64bn	₦2.62bn	59%	1.9 yr
Urban	2,586	1,537	₦2.11bn	₦2.11bn	67%	1.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	23,029	13,186	₦21bn	₦21bn	69%	1.6 yr
Residential Small	20,814	11,758	₦2.72bn	₦2.65bn	59%	1.9 yr
Shed	13,904	7,263	₦671m	₦671m	57%	1.9 yr
Residential Formal	2,491	1,581	₦529m	₦529m	39%	2.6 yr
Residential Informal	1,866	885	₦275m	₦275m	25%	4.4 yr
Commercial	614	471	₦1.97bn	₦1.97bn	45%	2.4 yr
Kiosk Shop	512	448	₦90.9m	₦90.9m	47%	2.4 yr
Apartment	286	171	₦53m	₦53m	47%	2.1 yr
Institutional	279	248	₦5.06bn	₦5.06bn	57%	1.9 yr
Commercial Corridor	232	232	₦909m	₦909m	51%	2.1 yr
Educational Facility	121	108	₦643m	₦643m	83%	1.4 yr
Duplex	113	76	₦25.9m	₦25.9m	49%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	64,778	36,886	₦37.3bn	₦37.2bn
Farmland	8	5	₦2.91m	₦2.91m
Industrial	5	5	₦8.33m	₦8.33m
Farmyard	1	0	₦29.4k	₦29.4k

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	63,418	35,715	₦27.1bn	₦27bn	55%	1.9 yr
SME High	859	716	₦2.94bn	₦2.94bn	47%	2.4 yr
Enterprise	515	465	₦7.3bn	₦7.25bn	69%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	37,113	21,186	₦30.7bn	₦30.6bn
0.0	13,927	7,270	₦672m	₦672m
2.0	8,694	5,188	₦1.14bn	₦1.12bn
4.0	3,531	2,136	₦1.9bn	₦1.9bn
1.0	762	481	₦33.3m	₦32.8m
5.0	572	488	₦1.36bn	₦1.36bn
6.0	193	147	₦1.55bn	₦1.55bn