Imo State

Rooftop solar in Owerri Municipal, Imo: what the roofs are worth

Owerri Municipal has 77,944 buildings with a viable rooftop and 2.38 GWp of roof capacity. 41% run a generator, and together they spend ₦85.9bn a year on energy.

Viable buildings

77,944

Usable roof area

10.6 km²

2.38 GWp roof capacity

Energy spend

₦85.9bn/yr

69.6 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Owerri Municipal

Approach B

Cash saved

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

Current energy spend₦85.9bn/yr

Year-one cash saved₦83bn

Lifetime cash saved₦4.38tn

NPV₦606bn

Median IRR25%

Median payback4.4 yr

Unlocked energy76.4 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity325 MWp

Capex₦296bn

Year-one energy value₦159bn

Lifetime energy value₦7.25tn

NPV₦1.11tn

Median IRR57%

Median payback1.9 yr

Three ways to size Owerri Municipal'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: 325 MWp
Capital cost: ₦296bn
Year 1 savings: ₦159bn/yr
NPV: ₦1.11tn
Median IRR: 57%
Median payback: 1.9 yr

The odds a rooftop in Owerri Municipal pays back quickly

Of the 76,258 buildings in Owerri Municipal with a modelled payback, 73.9% pay back inside five years and 25.5% inside three.

Create a free account

How much of Owerri Municipal's demand actually gets met

Buildings in Owerri Municipal consume 215 GWh/yr but want 291 GWh/yr. The 26% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Owerri Municipal

Loading band economics…

How many rooftops in Owerri Municipal 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 76,258 buildings with a modelled result out of 77,944 in Owerri Municipal. 66,902 clear a positive NPV.

Payback

Under 3 years19,470 (26%)

Under 5 years56,355 (74%)

Under 7 years66,808 (88%)

Under 10 years72,035 (94%)

Return (IRR)

Above 10%71,498 (92%)

Above 15%66,902 (86%)

Above 20%60,050 (77%)

Above 25%34,291 (44%)

CO₂ avoided

161 kt/yr

Fuel avoided

28.2 million litres/yr

Energy unlocked

76.4 GWh/yr

Demand that is suppressed today

People served

157k

What hardware costs right now

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

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 Owerri Municipal

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
A	73,462	28,886	₦80.9bn	₦78bn	25%	4.4 yr
B	3,865	2,607	₦4.49bn	₦4.42bn	45%	2.4 yr
C	509	468	₦349m	₦349m	71%	1.6 yr
E	108	105	₦194m	₦194m	67%	1.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	70,837	28,005	₦29.5bn	₦28.9bn	25%	4.4 yr
Commercial General	3,435	2,066	₦31.8bn	₦30.7bn	37%	2.9 yr
Commercial Retail	1,692	1,206	₦589m	₦589m	41%	2.6 yr
Anchor	1,004	381	₦18.2bn	₦17.2bn	39%	2.6 yr
Hospitality	348	133	₦3.77bn	₦3.46bn	33%	3.1 yr
Worship	246	80	₦265m	₦265m	33%	3.1 yr
Industrial	241	131	₦775m	₦746m	37%	2.9 yr
Filling Station	56	29	₦97.2m	₦97.2m	35%	2.9 yr
Mall Retail	55	22	₦946m	₦945m	35%	3.1 yr
Productive Use	26	10	₦30.7m	₦30.7m	33%	3.1 yr
Automotive	4	3	₦4.01m	₦4.01m	33%	3.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	23,203	8,943	₦13.1bn	₦12.9bn	25%	4.4 yr
250 1000m2	16,170	7,075	₦42.7bn	₦41.5bn	25%	4.4 yr
Under 30m2	14,982	6,186	₦733m	₦726m	19%	5.4 yr
50 100m2	13,082	5,339	₦2.32bn	₦2.24bn	25%	4.6 yr
30 50m2	9,975	4,245	₦899m	₦846m	23%	4.6 yr
Over 1000m2	532	278	₦26.2bn	₦24.7bn	35%	3.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	74,100	30,076	₦77.7bn	₦75.2bn	25%	4.4 yr
Unclassified	3,844	1,990	₦8.27bn	₦7.76bn	27%	4.1 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Informal	32,255	11,641	₦10bn	₦9.86bn	25%	4.4 yr
Residential Formal	21,874	6,741	₦2.84bn	₦2.84bn	25%	4.6 yr
Residential Small	4,942	3,039	₦1.39bn	₦1.33bn	39%	2.9 yr
Residential	4,696	3,399	₦14.7bn	₦14.4bn	53%	1.9 yr
Shed	4,692	2,535	₦340m	₦340m	27%	3.9 yr
Duplex	2,128	598	₦146m	₦146m	25%	4.6 yr
Kiosk Shop	1,678	1,197	₦539m	₦539m	41%	2.6 yr
Commercial	1,359	1,045	₦20.5bn	₦19.5bn	43%	2.4 yr
Commercial Corridor	730	522	₦5.51bn	₦5.49bn	43%	2.6 yr
Institutional	583	253	₦14.6bn	₦14bn	31%	3.6 yr
Unknown	549	227	₦2.34bn	₦2.33bn	31%	3.6 yr
Commercial	303	82	₦1.71bn	₦1.7bn	35%	3.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	77,310	31,748	₦83.9bn	₦80.9bn
Retail	549	234	₦1.54bn	₦1.54bn
Farmyard	82	82	₦116m	₦116m
Farmland	2	2	₦400m	₦382m
Commercial	1	0	₦3.2k	₦3.2k

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	74,293	29,858	₦38.8bn	₦37.9bn	25%	4.4 yr
SME High	2,437	1,706	₦28.3bn	₦27.3bn	43%	2.6 yr
Enterprise	1,214	502	₦18.8bn	₦17.8bn	39%	2.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
4.0	30,842	10,051	₦32.3bn	₦31.3bn
3.0	20,972	9,477	₦24bn	₦23.4bn
2.0	16,417	7,182	₦2.26bn	₦2.07bn
0.0	4,549	2,521	₦339m	₦339m
1.0	3,542	1,626	₦158m	₦158m
5.0	955	697	₦5.59bn	₦5.55bn
6.0	667	512	₦21.3bn	₦20.1bn