Yobe State

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

Fune has 188,442 buildings with a viable rooftop and 681 MWp of roof capacity. 2% run a generator, and together they spend ₦15.8bn a year on energy.

Viable buildings

188,442

Usable roof area

3.14 km²

681 MWp roof capacity

Energy spend

₦15.8bn/yr

11.4 GWh/yr burned on generators

Median payback

16.9 yr

Median IRR 5% (cash saved)

The savings bracket for Fune

Approach B

Cash saved

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

Current energy spend₦15.8bn/yr

Year-one cash saved₦14.3bn

Lifetime cash saved₦803bn

NPV₦115bn

Median IRR5%

Median payback16.9 yr

Unlocked energy18.7 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity99.2 MWp

Capex₦107bn

Year-one energy value₦113bn

Lifetime energy value₦5.24tn

NPV₦910bn

Median IRR99%

Median payback1.1 yr

Three ways to size Fune'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: 99.2 MWp
Capital cost: ₦107bn
Year 1 savings: ₦113bn/yr
NPV: ₦910bn
Median IRR: 99%
Median payback: 1.1 yr

The odds a rooftop in Fune pays back quickly

Of the 186,998 buildings in Fune with a modelled payback, 15.6% pay back inside five years and 4.1% inside three.

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How much of Fune's demand actually gets met

Buildings in Fune consume 34.3 GWh/yr but want 53 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 Fune

Loading band economics…

How many rooftops in Fune 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 186,998 buildings with a modelled result out of 188,442 in Fune. 39,900 clear a positive NPV.

Payback

Under 3 years7,583 (4%)

Under 5 years29,136 (16%)

Under 7 years40,104 (21%)

Under 10 years50,985 (27%)

Return (IRR)

Above 10%47,922 (25%)

Above 15%39,900 (21%)

Above 20%31,094 (17%)

Above 25%26,555 (14%)

CO₂ avoided

31.1 kt/yr

Fuel avoided

5.69 million litres/yr

Energy unlocked

18.7 GWh/yr

Demand that is suppressed today

People served

514k

What hardware costs right now

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

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 Fune

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	70,752	748	₦3.24bn	₦2.67bn	5%	17.9 yr
E	61,778	292	₦2.08bn	₦1.76bn	5%	18.1 yr
C	34,346	630	₦6.43bn	₦6.32bn	9%	9.9 yr
B	21,566	1,749	₦4.08bn	₦3.59bn	29%	3.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	181,049	1,479	₦11.7bn	₦10.2bn	5%	17.1 yr
Commercial Retail	5,196	1,171	₦414m	₦414m	37%	2.9 yr
Commercial General	1,864	503	₦1.72bn	₦1.72bn	37%	2.9 yr
Anchor	331	265	₦1.97bn	₦1.96bn	61%	1.6 yr
Automotive	1	1	₦50.9k	₦50.9k	51%	2.1 yr
Industrial	1	0	₦33.5k	₦33.5k	39%	2.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	145,972	1,420	₦555m	₦525m	5%	18.1 yr
30 50m2	28,033	724	₦1.02bn	₦981m	9%	9.6 yr
50 100m2	11,743	640	₦3.13bn	₦2.39bn	31%	3.4 yr
100 250m2	2,215	425	₦4.74bn	₦4.31bn	33%	3.4 yr
250 1000m2	439	187	₦4.73bn	₦4.5bn	39%	2.9 yr
Over 1000m2	40	23	₦1.65bn	₦1.64bn	55%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	125,056	919	₦5.42bn	₦4.76bn	3%	18.4 yr
Rural	34,141	550	₦1.98bn	₦1.76bn	9%	13.6 yr
Dense Urban	23,082	1,796	₦6.06bn	₦5.53bn	29%	3.6 yr
Urban	6,163	154	₦2.36bn	₦2.3bn	13%	7.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	155,413	875	₦348m	₦348m	5%	17.9 yr
Residential Small	13,447	292	₦3.29bn	₦2.52bn	31%	3.4 yr
Residential Formal	8,024	0	₦214m	₦184m	27%	4.1 yr
Kiosk Shop	5,196	1,171	₦414m	₦414m	37%	2.9 yr
Residential	4,164	312	₦7.86bn	₦7.19bn	27%	4.1 yr
Commercial	1,087	371	₦1.29bn	₦1.29bn	37%	2.9 yr
Market	337	0	₦15.1m	₦15.1m	37%	2.9 yr
Commercial Corridor	293	24	₦193m	₦192m	37%	2.9 yr
Institutional	149	118	₦1.42bn	₦1.42bn	55%	1.9 yr
Educational Facility	111	89	₦184m	₦184m	85%	1.1 yr
School	65	51	₦50.4m	₦50.4m	77%	1.4 yr
Healthcare Facility	55	45	₦334m	₦324m	55%	1.9 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	188,442	3,419	₦15.8bn	₦14.3bn

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	186,729	2,758	₦12.4bn	₦10.9bn	5%	16.9 yr
SME High	1,381	396	₦1.48bn	₦1.48bn	37%	2.9 yr
Enterprise	332	265	₦1.98bn	₦1.96bn	61%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	155,435	876	₦348m	₦348m
2.0	11,769	1,185	₦4.19bn	₦3.74bn
4.0	6,989	86	₦823m	₦791m
1.0	6,911	336	₦1.59bn	₦989m
3.0	6,493	621	₦7.59bn	₦7.21bn
5.0	791	279	₦673m	₦673m
6.0	54	36	₦599m	₦598m