Edo State

Rooftop solar in Uhunmwonde, Edo: what the roofs are worth

Uhunmwonde has 156,719 buildings with a viable rooftop and 4.59 GWp of roof capacity. 34% run a generator, and together they spend ₦57.6bn a year on energy.

Viable buildings

156,719

Usable roof area

20.4 km²

4.59 GWp roof capacity

Energy spend

₦57.6bn/yr

44 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Uhunmwonde

Approach B

Cash saved

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

Current energy spend₦57.6bn/yr

Year-one cash saved₦57.1bn

Lifetime cash saved₦3.29tn

NPV₦454bn

Median IRR25%

Median payback4.4 yr

Unlocked energy79.3 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity302 MWp

Capex₦268bn

Year-one energy value₦166bn

Lifetime energy value₦7.77tn

NPV₦1.23tn

Median IRR65%

Median payback1.6 yr

Three ways to size Uhunmwonde'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: 302 MWp
Capital cost: ₦268bn
Year 1 savings: ₦166bn/yr
NPV: ₦1.23tn
Median IRR: 65%
Median payback: 1.6 yr

The odds a rooftop in Uhunmwonde pays back quickly

Of the 152,651 buildings in Uhunmwonde with a modelled payback, 66.9% pay back inside five years and 28.3% inside three.

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How much of Uhunmwonde's demand actually gets met

Buildings in Uhunmwonde consume 146 GWh/yr but want 225 GWh/yr. The 35% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Uhunmwonde

Loading band economics…

How many rooftops in Uhunmwonde 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 152,651 buildings with a modelled result out of 156,719 in Uhunmwonde. 124,110 clear a positive NPV.

Payback

Under 3 years43,230 (28%)

Under 5 years102,138 (67%)

Under 7 years123,922 (81%)

Under 10 years136,361 (89%)

Return (IRR)

Above 10%134,649 (86%)

Above 15%124,110 (79%)

Above 20%107,601 (69%)

Above 25%65,021 (41%)

CO₂ avoided

125 kt/yr

Fuel avoided

19 million litres/yr

Energy unlocked

79.3 GWh/yr

Demand that is suppressed today

People served

181k

What hardware costs right now

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

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 Uhunmwonde

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
B	78,097	28,136	₦21.8bn	₦21.8bn	25%	4.4 yr
C	36,738	11,853	₦11.5bn	₦11.2bn	25%	4.4 yr
E	23,820	7,284	₦13bn	₦13bn	21%	4.9 yr
A	11,496	4,064	₦9.6bn	₦9.57bn	25%	4.4 yr
D	6,568	1,337	₦1.6bn	₦1.59bn	19%	5.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	145,451	47,869	₦21.5bn	₦21.4bn	25%	4.4 yr
Commercial General	6,687	3,027	₦25.5bn	₦25.5bn	35%	3.1 yr
Commercial Retail	3,984	1,366	₦534m	₦534m	33%	3.4 yr
Anchor	354	274	₦9.43bn	₦9.09bn	55%	1.9 yr
Industrial	137	82	₦389m	₦387m	43%	2.6 yr
Worship	46	29	₦33.8m	₦33.8m	39%	2.6 yr
Hospitality	34	16	₦159m	₦159m	33%	3.1 yr
Filling Station	17	6	₦8.88m	₦8.88m	33%	3.1 yr
Mall Retail	7	4	₦5.2m	₦5.2m	35%	3.1 yr
Productive Use	2	1	₦836k	₦836k	33%	1.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	52,354	18,414	₦16.6bn	₦16.5bn	25%	4.4 yr
250 1000m2	38,743	14,529	₦29.3bn	₦29.2bn	25%	4.4 yr
Under 30m2	33,754	9,899	₦874m	₦865m	13%	6.6 yr
50 100m2	17,807	5,611	₦1.51bn	₦1.51bn	19%	5.9 yr
30 50m2	13,893	4,141	₦638m	₦637m	17%	5.9 yr
Over 1000m2	168	80	₦8.64bn	₦8.32bn	33%	3.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	74,975	26,309	₦26bn	₦25.8bn	25%	4.4 yr
Urban	39,991	16,342	₦15.1bn	₦15.1bn	25%	4.4 yr
Unclassified	34,046	6,981	₦11.5bn	₦11.3bn	19%	5.4 yr
Rural	7,707	3,042	₦4.93bn	₦4.89bn	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Formal	51,006	18,246	₦5.2bn	₦5.2bn	25%	4.4 yr
Residential	34,153	12,415	₦13.1bn	₦13bn	25%	4.4 yr
Shed	21,628	5,166	₦647m	₦647m	17%	6.4 yr
Residential Small	18,604	6,118	₦1.05bn	₦1.05bn	17%	6.1 yr
Residential Informal	9,192	2,007	₦683m	₦683m	25%	4.4 yr
Apartment	9,014	3,272	₦682m	₦682m	25%	4.4 yr
Commercial	4,667	2,274	₦19.4bn	₦19.4bn	35%	3.1 yr
Kiosk Shop	3,984	1,365	₦534m	₦534m	33%	3.4 yr
Duplex	1,850	645	₦129m	₦129m	25%	4.4 yr
Commercial Corridor	1,272	345	₦3.87bn	₦3.86bn	35%	3.1 yr
Unknown	469	200	₦1.03bn	₦1.03bn	31%	3.6 yr
Institutional	274	200	₦8.76bn	₦8.45bn	53%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	156,467	52,601	₦57.5bn	₦57.1bn
Industrial	251	73	₦40.3m	₦40.3m
Commercial	1	0	₦36.9k	₦36.9k

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	150,325	49,726	₦24.6bn	₦24.6bn	25%	4.4 yr
SME High	5,972	2,633	₦23.3bn	₦23.3bn	35%	3.1 yr
Enterprise	422	315	₦9.63bn	₦9.3bn	55%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
4.0	64,401	22,426	₦9.56bn	₦9.55bn
3.0	50,572	18,237	₦23.2bn	₦22.8bn
0.0	21,587	5,134	₦634m	₦634m
2.0	12,864	3,884	₦1.02bn	₦1.02bn
5.0	3,416	1,451	₦8.15bn	₦8.14bn
6.0	2,080	1,045	₦14.9bn	₦14.9bn
1.0	1,799	497	₦72.1m	₦71m