Imo State

Rooftop solar in Ideato South, Imo: what the roofs are worth

Ideato South has 21,718 buildings with a viable rooftop and 516 MWp of roof capacity. 29% run a generator, and together they spend ₦15.1bn a year on energy.

Viable buildings

21,718

Usable roof area

2.29 km²

516 MWp roof capacity

Energy spend

₦15.1bn/yr

13 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Ideato South

Approach B

Cash saved

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

Current energy spend₦15.1bn/yr

Year-one cash saved₦14.2bn

Lifetime cash saved₦743bn

NPV₦115bn

Median IRR25%

Median payback4.4 yr

Unlocked energy13.8 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity80 MWp

Capex₦83.1bn

Year-one energy value₦75.1bn

Lifetime energy value₦3.58tn

NPV₦603bn

Median IRR101%

Median payback1.1 yr

Three ways to size Ideato South'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: 80 MWp
Capital cost: ₦83.1bn
Year 1 savings: ₦75.1bn/yr
NPV: ₦603bn
Median IRR: 101%
Median payback: 1.1 yr

The odds a rooftop in Ideato South pays back quickly

Of the 21,707 buildings in Ideato South with a modelled payback, 78.3% pay back inside five years and 28.9% inside three.

Create a free account

How much of Ideato South's demand actually gets met

Buildings in Ideato South consume 22.2 GWh/yr but want 36 GWh/yr. The 38% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Ideato South

Loading band economics…

How many rooftops in Ideato South 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 21,707 buildings with a modelled result out of 21,718 in Ideato South. 18,880 clear a positive NPV.

Payback

Under 3 years6,276 (29%)

Under 5 years16,991 (78%)

Under 7 years18,872 (87%)

Under 10 years19,849 (91%)

Return (IRR)

Above 10%19,507 (90%)

Above 15%18,880 (87%)

Above 20%17,791 (82%)

Above 25%11,340 (52%)

CO₂ avoided

27.4 kt/yr

Fuel avoided

7.47 million litres/yr

Energy unlocked

13.8 GWh/yr

Demand that is suppressed today

People served

224k

What hardware costs right now

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

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 Ideato South

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	9,458	2,813	₦7.55bn	₦6.63bn	25%	4.4 yr
C	6,673	2,222	₦4.74bn	₦4.73bn	25%	4.4 yr
E	5,587	1,318	₦2.85bn	₦2.81bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	20,971	5,923	₦12.7bn	₦11.8bn	25%	4.4 yr
Commercial General	370	186	₦1.29bn	₦1.25bn	37%	2.9 yr
Anchor	166	123	₦839m	₦838m	55%	1.9 yr
Commercial Retail	104	41	₦19.9m	₦19.9m	33%	3.4 yr
Worship	74	62	₦213m	₦213m	63%	1.6 yr
Industrial	30	17	₦68.4m	₦68.4m	45%	2.4 yr
Filling Station	3	1	₦7.64m	₦7.64m	33%	3.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	9,100	2,685	₦6.38bn	₦6.37bn	25%	4.4 yr
50 100m2	5,444	1,444	₦1.07bn	₦950m	25%	4.4 yr
30 50m2	2,582	718	₦173m	₦171m	19%	5.9 yr
Under 30m2	2,471	756	₦93.6m	₦93.6m	9%	13.1 yr
250 1000m2	2,105	737	₦6.82bn	₦6.02bn	25%	4.4 yr
Over 1000m2	16	13	₦597m	₦565m	63%	1.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	14,623	4,846	₦10.6bn	₦9.63bn	25%	4.4 yr
Urban	6,134	1,357	₦4.28bn	₦4.24bn	25%	4.4 yr
Unclassified	961	150	₦307m	₦297m	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	8,270	2,462	₦1.64bn	₦1.53bn	25%	4.4 yr
Residential	8,053	2,501	₦10.8bn	₦10bn	25%	4.4 yr
Shed	3,415	870	₦80.5m	₦80.5m	9%	12.6 yr
Residential Formal	612	6	₦48.2m	₦48.2m	25%	4.4 yr
Residential Informal	505	81	₦75.1m	₦66m	25%	4.4 yr
Commercial Corridor	135	20	₦148m	₦148m	33%	3.1 yr
Institutional	134	95	₦759m	₦727m	57%	1.9 yr
Commercial	111	81	₦599m	₦599m	57%	1.9 yr
Kiosk Shop	104	41	₦19.9m	₦19.9m	33%	3.4 yr
Educational Facility	58	43	₦194m	₦194m	81%	1.4 yr
Apartment	57	1	₦5.77m	₦5.77m	25%	4.4 yr
Duplex	54	0	₦4.93m	₦4.93m	25%	4.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	21,718	6,353	₦15.1bn	₦14.2bn

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	21,273	6,111	₦13.5bn	₦12.5bn	25%	4.4 yr
SME High	249	102	₦754m	₦754m	35%	3.1 yr
Enterprise	196	140	₦907m	₦907m	55%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	12,928	4,067	₦13.2bn	₦12.4bn
2.0	4,112	1,214	₦1.04bn	₦905m
0.0	3,420	872	₦81.5m	₦81.5m
4.0	867	68	₦540m	₦540m
1.0	357	127	₦42.4m	₦42.4m
5.0	33	5	₦178m	₦178m
6.0	1	0	₦14.7m	₦14.7m