Jigawa State

Rooftop solar in Yankwashi, Jigawa: what the roofs are worth

Yankwashi has 38,546 buildings with a viable rooftop and 255 MWp of roof capacity. 5% run a generator, and together they spend ₦4.04bn a year on energy.

Viable buildings

38,546

Usable roof area

1.16 km²

255 MWp roof capacity

Energy spend

₦4.04bn/yr

3.09 GWh/yr burned on generators

Median payback

13.6 yr

Median IRR 9% (cash saved)

The savings bracket for Yankwashi

Approach B

Cash saved

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

Current energy spend₦4.04bn/yr

Year-one cash saved₦3.85bn

Lifetime cash saved₦213bn

NPV₦30.4bn

Median IRR9%

Median payback13.6 yr

Unlocked energy4.11 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity28.1 MWp

Capex₦30.3bn

Year-one energy value₦32.6bn

Lifetime energy value₦1.55tn

NPV₦267bn

Median IRR101%

Median payback1.1 yr

Three ways to size Yankwashi'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: 28.1 MWp
Capital cost: ₦30.3bn
Year 1 savings: ₦32.6bn/yr
NPV: ₦267bn
Median IRR: 101%
Median payback: 1.1 yr

The odds a rooftop in Yankwashi pays back quickly

Of the 38,253 buildings in Yankwashi with a modelled payback, 27.4% pay back inside five years and 5.6% inside three.

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How much of Yankwashi's demand actually gets met

Buildings in Yankwashi consume 8.81 GWh/yr but want 12.9 GWh/yr. The 32% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Yankwashi

Loading band economics…

How many rooftops in Yankwashi 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 38,253 buildings with a modelled result out of 38,546 in Yankwashi. 14,157 clear a positive NPV.

Payback

Under 3 years2,137 (6%)

Under 5 years10,470 (27%)

Under 7 years14,206 (37%)

Under 10 years17,594 (46%)

Return (IRR)

Above 10%16,512 (43%)

Above 15%14,157 (37%)

Above 20%11,438 (30%)

Above 25%8,589 (22%)

CO₂ avoided

7.87 kt/yr

Fuel avoided

1.58 million litres/yr

Energy unlocked

4.11 GWh/yr

Demand that is suppressed today

People served

134k

What hardware costs right now

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

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 Yankwashi

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	12,191	34	₦255m	₦255m	5%	15.9 yr
E	10,719	24	₦312m	₦312m	7%	14.9 yr
C	10,657	807	₦812m	₦805m	9%	13.4 yr
A	2,838	989	₦1.69bn	₦1.51bn	31%	3.6 yr
B	2,141	258	₦972m	₦972m	17%	6.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	37,622	1,238	₦2.87bn	₦2.87bn	7%	13.9 yr
Commercial Retail	632	625	₦69m	₦69m	67%	1.6 yr
Commercial General	195	166	₦368m	₦362m	49%	2.1 yr
Anchor	80	70	₦729m	₦544m	83%	1.4 yr
Worship	15	11	₦2.98m	₦2.98m	49%	2.1 yr
Industrial	2	2	₦3.81m	₦3.81m	59%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	22,603	762	₦121m	₦121m	5%	17.1 yr
30 50m2	7,593	523	₦162m	₦162m	11%	8.6 yr
50 100m2	4,883	409	₦366m	₦366m	27%	4.1 yr
100 250m2	2,610	278	₦894m	₦894m	31%	3.4 yr
250 1000m2	828	130	₦1.82bn	₦1.82bn	33%	3.4 yr
Over 1000m2	29	10	₦682m	₦492m	33%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	28,923	338	₦1.5bn	₦1.5bn	7%	14.6 yr
Dense Urban	6,608	1,746	₦2.45bn	₦2.26bn	25%	4.4 yr
Unclassified	3,015	28	₦94.1m	₦94.1m	5%	17.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	26,221	223	₦99.4m	₦99.4m	5%	16.4 yr
Residential Small	4,605	83	₦264m	₦264m	25%	4.1 yr
Residential Informal	4,026	849	₦976m	₦976m	27%	4.1 yr
Residential	2,770	83	₦1.53bn	₦1.53bn	31%	3.4 yr
Kiosk Shop	632	625	₦69m	₦69m	67%	1.6 yr
Commercial Corridor	137	122	₦237m	₦231m	49%	2.1 yr
Educational Facility	46	41	₦58.2m	₦58.2m	89%	1.1 yr
Institutional	32	26	₦483m	₦299m	55%	1.9 yr
Commercial	27	23	₦66.2m	₦66.2m	65%	1.6 yr
Healthcare Facility	19	16	₦157m	₦157m	57%	1.9 yr
Worship Center	11	8	₦1.63m	₦1.63m	55%	1.9 yr
School	9	8	₦93.8m	₦93.8m	87%	1.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	38,546	2,112	₦4.04bn	₦3.85bn

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	38,300	1,895	₦3.01bn	₦3.01bn	7%	13.9 yr
SME High	164	145	₦303m	₦297m	49%	2.1 yr
Enterprise	82	72	₦733m	₦548m	81%	1.4 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	25,241	165	₦82.1m	₦82.1m
2.0	5,759	605	₦650m	₦650m
1.0	5,055	775	₦225m	₦225m
3.0	2,125	399	₦2.06bn	₦2.06bn
4.0	344	151	₦914m	₦730m
5.0	18	14	₦100m	₦94.4m
6.0	4	3	₦16.1m	₦16.1m