Ebonyi State

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

Ivo has 27,721 buildings with a viable rooftop and 509 MWp of roof capacity. 37% run a generator, and together they spend ₦16.8bn a year on energy.

Viable buildings

27,721

Usable roof area

2.27 km²

509 MWp roof capacity

Energy spend

₦16.8bn/yr

15.8 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Ivo

Approach B

Cash saved

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

Current energy spend₦16.8bn/yr

Year-one cash saved₦16.5bn

Lifetime cash saved₦861bn

NPV₦135bn

Median IRR25%

Median payback4.4 yr

Unlocked energy14.9 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity64.9 MWp

Capex₦65.7bn

Year-one energy value₦56.5bn

Lifetime energy value₦2.68tn

NPV₦450bn

Median IRR95%

Median payback1.1 yr

Three ways to size Ivo'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: 64.9 MWp
Capital cost: ₦65.7bn
Year 1 savings: ₦56.5bn/yr
NPV: ₦450bn
Median IRR: 95%
Median payback: 1.1 yr

The odds a rooftop in Ivo pays back quickly

Of the 27,601 buildings in Ivo with a modelled payback, 70.0% pay back inside five years and 37.5% inside three.

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How much of Ivo's demand actually gets met

Buildings in Ivo consume 24.4 GWh/yr but want 39.3 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 Ivo

Loading band economics…

How many rooftops in Ivo 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 27,601 buildings with a modelled result out of 27,721 in Ivo. 23,504 clear a positive NPV.

Payback

Under 3 years10,337 (37%)

Under 5 years19,320 (70%)

Under 7 years23,470 (85%)

Under 10 years25,369 (92%)

Return (IRR)

Above 10%25,022 (90%)

Above 15%23,504 (85%)

Above 20%20,538 (74%)

Above 25%15,201 (55%)

CO₂ avoided

30.5 kt/yr

Fuel avoided

8.6 million litres/yr

Energy unlocked

14.9 GWh/yr

Demand that is suppressed today

People served

138k

What hardware costs right now

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

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 Ivo

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	8,727	4,361	₦6.19bn	₦6.05bn	35%	3.1 yr
C	8,418	2,512	₦4.69bn	₦4.63bn	25%	4.4 yr
E	6,681	2,432	₦4.91bn	₦4.77bn	25%	4.4 yr
B	3,895	1,072	₦1.02bn	₦1.02bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	26,178	9,090	₦12.3bn	₦12.1bn	25%	4.4 yr
Commercial General	650	546	₦1.83bn	₦1.83bn	55%	1.9 yr
Anchor	316	260	₦1.72bn	₦1.65bn	59%	1.9 yr
Industrial	279	222	₦624m	₦623m	65%	1.6 yr
Worship	176	144	₦225m	₦225m	57%	1.9 yr
Commercial Retail	105	105	₦42.9m	₦42.9m	67%	1.6 yr
Filling Station	15	10	₦18.1m	₦18.1m	49%	2.1 yr
Hospitality	2	0	₦244k	₦244k	29%	3.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
50 100m2	8,400	2,993	₦1.82bn	₦1.79bn	25%	4.4 yr
100 250m2	8,127	3,221	₦6.7bn	₦6.57bn	25%	4.4 yr
30 50m2	4,774	1,647	₦438m	₦424m	21%	5.4 yr
Under 30m2	4,690	1,655	₦223m	₦222m	15%	6.9 yr
250 1000m2	1,713	849	₦6.44bn	₦6.35bn	35%	3.1 yr
Over 1000m2	17	12	₦1.19bn	₦1.11bn	75%	1.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Dense Urban	17,695	6,174	₦7.15bn	₦7.08bn	25%	4.4 yr
Urban	5,971	3,092	₦6.6bn	₦6.46bn	45%	2.4 yr
Unclassified	3,547	1,062	₦2.98bn	₦2.85bn	25%	4.4 yr
Rural	508	49	₦65.7m	₦65.7m	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	10,606	4,352	₦2.42bn	₦2.32bn	25%	4.4 yr
Residential Formal	5,953	1,131	₦467m	₦467m	23%	4.6 yr
Residential	5,087	2,325	₦9.28bn	₦9.12bn	25%	4.1 yr
Shed	3,504	1,199	₦110m	₦110m	11%	8.6 yr
Residential Informal	840	1	₦37.9m	₦37.9m	23%	4.6 yr
Institutional	529	429	₦1.64bn	₦1.57bn	53%	2.1 yr
Industrial Site	273	220	₦622m	₦622m	65%	1.6 yr
Agricultural	185	82	₦25.5m	₦25.5m	29%	3.9 yr
Commercial Corridor	144	143	₦745m	₦745m	69%	1.6 yr
Educational Facility	115	101	₦351m	₦351m	77%	1.4 yr
Kiosk Shop	105	105	₦42.9m	₦42.9m	67%	1.6 yr
School	79	68	₦151m	₦151m	75%	1.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	27,720	10,377	₦16.8bn	₦16.5bn
Farmyard	1	0	₦73.6k	₦73.6k

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	26,952	9,731	₦13.6bn	₦13.3bn	25%	4.4 yr
Enterprise	595	482	₦2.34bn	₦2.27bn	61%	1.6 yr
SME High	174	164	₦849m	₦849m	69%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	9,760	3,941	₦2.56bn	₦2.53bn
3.0	7,538	3,287	₦12.2bn	₦11.9bn
4.0	4,804	1,050	₦1.59bn	₦1.59bn
0.0	3,638	1,249	₦124m	₦124m
1.0	1,974	845	₦256m	₦256m
5.0	7	5	₦69.9m	₦69.9m