Edo State

Rooftop solar in Owan West, Edo: what the roofs are worth

Owan West has 26,219 buildings with a viable rooftop and 726 MWp of roof capacity. 36% run a generator, and together they spend ₦23.7bn a year on energy.

Viable buildings

26,219

Usable roof area

3.22 km²

726 MWp roof capacity

Energy spend

₦23.7bn/yr

23.2 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Owan West

Approach B

Cash saved

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

Current energy spend₦23.7bn/yr

Year-one cash saved₦23.3bn

Lifetime cash saved₦1.23tn

NPV₦188bn

Median IRR25%

Median payback4.4 yr

Unlocked energy19.2 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity82.4 MWp

Capex₦82bn

Year-one energy value₦68.8bn

Lifetime energy value₦3.25tn

NPV₦543bn

Median IRR85%

Median payback1.1 yr

Three ways to size Owan 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: 82.4 MWp
Capital cost: ₦82bn
Year 1 savings: ₦68.8bn/yr
NPV: ₦543bn
Median IRR: 85%
Median payback: 1.1 yr

The odds a rooftop in Owan West pays back quickly

Of the 25,790 buildings in Owan West with a modelled payback, 74.2% pay back inside five years and 36.0% inside three.

Create a free account

How much of Owan West's demand actually gets met

Buildings in Owan West consume 38.1 GWh/yr but want 57.2 GWh/yr. The 33% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Owan West

Loading band economics…

How many rooftops in Owan 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 25,790 buildings with a modelled result out of 26,219 in Owan West. 21,628 clear a positive NPV.

Payback

Under 3 years9,286 (36%)

Under 5 years19,126 (74%)

Under 7 years21,613 (84%)

Under 10 years23,030 (89%)

Return (IRR)

Above 10%22,767 (87%)

Above 15%21,628 (82%)

Above 20%19,800 (76%)

Above 25%17,665 (67%)

CO₂ avoided

41.8 kt/yr

Fuel avoided

11.2 million litres/yr

Energy unlocked

19.2 GWh/yr

Demand that is suppressed today

People served

147k

What hardware costs right now

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

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
E	11,490	3,613	₦13.1bn	₦12.9bn	25%	4.4 yr
D	9,299	4,015	₦7.99bn	₦7.81bn	25%	4.1 yr
C	5,430	1,842	₦2.55bn	₦2.55bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	25,116	8,403	₦14.7bn	₦14.3bn	25%	4.4 yr
Commercial General	632	616	₦6.99bn	₦6.99bn	63%	1.6 yr
Anchor	254	234	₦1.81bn	₦1.81bn	61%	1.6 yr
Commercial Retail	212	212	₦86.7m	₦86.7m	61%	1.6 yr
Worship	3	3	₦14.4m	₦14.4m	63%	1.6 yr
Filling Station	1	1	₦2.21m	₦2.21m	57%	1.9 yr
Hospitality	1	1	₦5.04m	₦5.04m	37%	2.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	9,379	3,397	₦7.57bn	₦7.57bn	25%	4.4 yr
Under 30m2	5,968	2,032	₦228m	₦228m	15%	6.6 yr
250 1000m2	4,721	2,053	₦13.7bn	₦13.5bn	27%	4.1 yr
50 100m2	3,407	1,101	₦749m	₦573m	25%	4.4 yr
30 50m2	2,715	870	₦198m	₦198m	19%	5.4 yr
Over 1000m2	29	17	₦1.18bn	₦1.18bn	49%	2.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Dense Urban	15,014	6,480	₦13.1bn	₦13.1bn	25%	4.1 yr
Urban	5,969	2,090	₦7.15bn	₦7.15bn	25%	4.4 yr
Unclassified	3,818	609	₦2.49bn	₦2.09bn	21%	4.9 yr
Rural	1,418	291	₦910m	₦910m	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	9,721	3,621	₦12.5bn	₦12.3bn	25%	4.1 yr
Residential Small	5,292	1,831	₦862m	₦685m	25%	4.4 yr
Shed	5,070	1,439	₦165m	₦165m	11%	8.6 yr
Residential Formal	3,674	991	₦729m	₦729m	25%	4.4 yr
Residential Informal	839	397	₦351m	₦351m	27%	4.1 yr
Apartment	416	104	₦68m	₦68m	25%	4.4 yr
Commercial Corridor	386	386	₦4.23bn	₦4.23bn	65%	1.6 yr
Kiosk Shop	212	212	₦86.7m	₦86.7m	61%	1.6 yr
Institutional	131	122	₦1.27bn	₦1.27bn	51%	2.1 yr
Duplex	104	20	₦17m	₦17m	25%	4.4 yr
Commercial	95	95	₦1.82bn	₦1.82bn	69%	1.6 yr
Educational Facility	94	85	₦427m	₦427m	73%	1.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	26,219	9,470	₦23.7bn	₦23.3bn

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	25,483	8,754	₦15.8bn	₦15.4bn	25%	4.4 yr
SME High	482	482	₦6.05bn	₦6.05bn	67%	1.6 yr
Enterprise	254	234	₦1.81bn	₦1.81bn	61%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	12,449	4,958	₦15.4bn	₦15bn
0.0	5,066	1,435	₦165m	₦165m
4.0	4,726	1,551	₦5.69bn	₦5.69bn
2.0	2,985	1,049	₦640m	₦640m
1.0	891	375	₦108m	₦108m
5.0	85	85	₦1.22bn	₦1.22bn
6.0	17	17	₦395m	₦395m