Ekiti State

Rooftop solar in Ilejemeje, Ekiti: what the roofs are worth

Ilejemeje has 6,236 buildings with a viable rooftop and 135 MWp of roof capacity. 44% run a generator, and together they spend ₦12.7bn a year on energy.

Viable buildings

6,236

Usable roof area

601,391 m²

135 MWp roof capacity

Energy spend

₦12.7bn/yr

11.5 GWh/yr burned on generators

Median payback

3.9 yr

Median IRR 27% (cash saved)

The savings bracket for Ilejemeje

Approach B

Cash saved

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

Current energy spend₦12.7bn/yr

Year-one cash saved₦12.2bn

Lifetime cash saved₦616bn

NPV₦99.5bn

Median IRR27%

Median payback3.9 yr

Unlocked energy5.5 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity26.3 MWp

Capex₦27.4bn

Year-one energy value₦26.7bn

Lifetime energy value₦1.26tn

NPV₦215bn

Median IRR105%

Median payback1.1 yr

Three ways to size Ilejemeje'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: 26.3 MWp
Capital cost: ₦27.4bn
Year 1 savings: ₦26.7bn/yr
NPV: ₦215bn
Median IRR: 105%
Median payback: 1.1 yr

The odds a rooftop in Ilejemeje pays back quickly

Of the 6,172 buildings in Ilejemeje with a modelled payback, 77.6% pay back inside five years and 44.1% inside three.

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How much of Ilejemeje's demand actually gets met

Buildings in Ilejemeje consume 15.1 GWh/yr but want 20.6 GWh/yr. The 27% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Ilejemeje

Loading band economics…

How many rooftops in Ilejemeje 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 6,172 buildings with a modelled result out of 6,236 in Ilejemeje. 5,333 clear a positive NPV.

Payback

Under 3 years2,719 (44%)

Under 5 years4,792 (78%)

Under 7 years5,333 (86%)

Under 10 years5,673 (92%)

Return (IRR)

Above 10%5,600 (90%)

Above 15%5,333 (86%)

Above 20%4,960 (80%)

Above 25%4,557 (73%)

CO₂ avoided

20.4 kt/yr

Fuel avoided

7.11 million litres/yr

Energy unlocked

5.5 GWh/yr

Demand that is suppressed today

People served

58.9k

What hardware costs right now

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

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 Ilejemeje

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
E	4,357	2,291	₦10.9bn	₦10.5bn	65%	1.6 yr
D	1,879	425	₦1.79bn	₦1.7bn	27%	4.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	5,937	2,449	₦11.3bn	₦10.9bn	27%	4.1 yr
Anchor	107	94	₦735m	₦645m	77%	1.4 yr
Commercial General	80	69	₦372m	₦372m	59%	1.9 yr
Industrial	77	75	₦266m	₦266m	71%	1.4 yr
Worship	32	26	₦37.9m	₦37.9m	59%	1.6 yr
Filling Station	2	2	₦907k	₦907k	43%	1.6 yr
Commercial Retail	1	1	₦285k	₦285k	65%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	2,313	1,025	₦6.17bn	₦6.11bn	27%	3.9 yr
Under 30m2	1,647	710	₦162m	₦162m	19%	5.4 yr
50 100m2	934	385	₦499m	₦497m	27%	4.1 yr
30 50m2	735	307	₦166m	₦166m	25%	4.6 yr
250 1000m2	605	288	₦5.4bn	₦5.08bn	29%	3.9 yr
Over 1000m2	2	1	₦272m	₦185m	27%	1.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Dense Urban	4,089	1,150	₦4.08bn	₦4.07bn	27%	4.1 yr
Rural	1,162	1,062	₦4.76bn	₦4.53bn	77%	1.4 yr
Urban	502	360	₦2.46bn	₦2.37bn	75%	1.4 yr
Unclassified	483	144	₦1.37bn	₦1.22bn	27%	4.1 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	2,126	1,042	₦984m	₦982m	27%	1.9 yr
Residential	1,958	989	₦10.2bn	₦9.77bn	59%	1.9 yr
Residential Formal	937	1	₦61.2m	₦61.2m	27%	4.1 yr
Shed	907	416	₦56m	₦56m	19%	5.6 yr
Institutional	105	92	₦409m	₦409m	59%	1.9 yr
Educational Facility	35	33	₦107m	₦107m	85%	1.1 yr
Industrial Site	35	34	₦112m	₦112m	73%	1.4 yr
School	28	25	₦54.9m	₦54.9m	83%	1.1 yr
Industrial	21	21	₦126m	₦126m	75%	1.4 yr
Healthcare Facility	20	16	₦483m	₦393m	53%	2.1 yr
Clinic	17	14	₦77.5m	₦77.4m	51%	2.1 yr
Worship Center	11	9	₦9.36m	₦9.36m	61%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	6,236	2,716	₦12.7bn	₦12.2bn

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	6,048	2,543	₦11.7bn	₦11.3bn	27%	4.1 yr
Enterprise	184	169	₦1bn	₦911m	73%	1.4 yr
SME High	4	4	₦11.4m	₦11.4m	65%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	2,384	1,146	₦11.1bn	₦10.7bn
2.0	1,618	811	₦1.16bn	₦1.13bn
0.0	911	417	₦57m	₦57m
4.0	677	14	₦197m	₦197m
1.0	645	327	₦101m	₦99.3m
5.0	1	1	₦10.9m	₦10.9m