Yobe State

Rooftop solar in Yunusari, Yobe: what the roofs are worth

Yunusari has 97,455 buildings with a viable rooftop and 337 MWp of roof capacity. 1% run a generator, and together they spend ₦5.28bn a year on energy.

Viable buildings

97,455

Usable roof area

1.55 km²

337 MWp roof capacity

Energy spend

₦5.28bn/yr

4.36 GWh/yr burned on generators

Median payback

16.6 yr

Median IRR 5% (cash saved)

The savings bracket for Yunusari

Approach B

Cash saved

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

Current energy spend₦5.28bn/yr

Year-one cash saved₦5.11bn

Lifetime cash saved₦280bn

NPV₦39.2bn

Median IRR5%

Median payback16.6 yr

Unlocked energy5.29 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity39.1 MWp

Capex₦43.7bn

Year-one energy value₦49.8bn

Lifetime energy value₦2.34tn

NPV₦408bn

Median IRR103%

Median payback1.1 yr

Three ways to size Yunusari'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: 39.1 MWp
Capital cost: ₦43.7bn
Year 1 savings: ₦49.8bn/yr
NPV: ₦408bn
Median IRR: 103%
Median payback: 1.1 yr

The odds a rooftop in Yunusari pays back quickly

Of the 96,836 buildings in Yunusari with a modelled payback, 10.1% pay back inside five years and 1.3% inside three.

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How much of Yunusari's demand actually gets met

Buildings in Yunusari consume 10 GWh/yr but want 15.3 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 Yunusari

Loading band economics…

How many rooftops in Yunusari 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 96,836 buildings with a modelled result out of 97,455 in Yunusari. 13,415 clear a positive NPV.

Payback

Under 3 years1,246 (1%)

Under 5 years9,821 (10%)

Under 7 years13,469 (14%)

Under 10 years18,039 (19%)

Return (IRR)

Above 10%16,097 (17%)

Above 15%13,415 (14%)

Above 20%10,634 (11%)

Above 25%8,585 (9%)

CO₂ avoided

10.2 kt/yr

Fuel avoided

2.28 million litres/yr

Energy unlocked

5.29 GWh/yr

Demand that is suppressed today

People served

202k

What hardware costs right now

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

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 Yunusari

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	40,963	375	₦922m	₦918m	5%	16.9 yr
E	40,729	288	₦1.26bn	₦1.26bn	5%	17.1 yr
C	13,518	564	₦3.06bn	₦2.89bn	7%	14.6 yr
B	2,245	9	₦43.6m	₦43.6m	21%	5.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	97,182	1,009	₦3.98bn	₦3.8bn	5%	16.6 yr
Anchor	177	148	₦1.07bn	₦1.07bn	59%	1.9 yr
Commercial General	93	77	₦233m	₦233m	57%	1.9 yr
Commercial Retail	3	2	₦454k	₦454k	61%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	78,040	606	₦188m	₦188m	5%	17.4 yr
30 50m2	12,836	174	₦275m	₦275m	9%	13.1 yr
50 100m2	5,326	143	₦656m	₦656m	31%	3.4 yr
100 250m2	1,012	193	₦1.64bn	₦1.47bn	31%	3.4 yr
250 1000m2	228	110	₦1.47bn	₦1.47bn	35%	3.1 yr
Over 1000m2	13	10	₦1.05bn	₦1.05bn	71%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	75,176	643	₦2.31bn	₦2.27bn	5%	17.1 yr
Rural	16,164	471	₦1.25bn	₦1.25bn	5%	15.9 yr
Dense Urban	4,851	32	₦403m	₦403m	21%	5.1 yr
Urban	1,264	90	₦1.32bn	₦1.19bn	21%	4.9 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	84,115	554	₦185m	₦185m	5%	17.1 yr
Residential Small	7,043	145	₦867m	₦866m	31%	3.4 yr
Residential	3,321	308	₦2.88bn	₦2.71bn	21%	5.4 yr
Residential Formal	2,701	2	₦44.9m	₦44.9m	23%	4.6 yr
Institutional	79	64	₦978m	₦978m	57%	1.9 yr
Educational Facility	43	35	₦51.9m	₦51.9m	85%	1.1 yr
Healthcare Facility	40	32	₦119m	₦119m	55%	1.9 yr
School	33	27	₦23.7m	₦23.7m	81%	1.4 yr
Hospital	30	26	₦35.2m	₦35.1m	55%	1.9 yr
Clinic	26	24	₦53.1m	₦53.1m	55%	1.9 yr
Commercial	18	17	₦46.1m	₦46.1m	73%	1.4 yr
Kiosk Shop	3	2	₦454k	₦454k	61%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	97,406	1,214	₦5.22bn	₦5.05bn
Farmland	32	22	₦64.3m	₦64.3m
Farmyard	17	0	₦868k	₦868k

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	97,261	1,071	₦4.16bn	₦3.99bn	5%	16.6 yr
Enterprise	177	148	₦1.07bn	₦1.07bn	59%	1.9 yr
SME High	17	17	₦46.1m	₦46.1m	73%	1.4 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	84,116	555	₦185m	₦185m
2.0	5,547	273	₦947m	₦946m
1.0	3,119	127	₦288m	₦288m
3.0	2,506	274	₦3.78bn	₦3.61bn
4.0	2,167	7	₦83.4m	₦83.4m