Jigawa State

Rooftop solar in Sule Tankarkar, Jigawa: what the roofs are worth

Sule Tankarkar has 110,542 buildings with a viable rooftop and 592 MWp of roof capacity. 5% run a generator, and together they spend ₦8.42bn a year on energy.

Viable buildings

110,542

Usable roof area

2.69 km²

592 MWp roof capacity

Energy spend

₦8.42bn/yr

7.22 GWh/yr burned on generators

Median payback

15.4 yr

Median IRR 7% (cash saved)

The savings bracket for Sule Tankarkar

Approach B

Cash saved

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

Current energy spend₦8.42bn/yr

Year-one cash saved₦7.62bn

Lifetime cash saved₦406bn

NPV₦59.8bn

Median IRR7%

Median payback15.4 yr

Unlocked energy7.41 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity48.4 MWp

Capex₦53.6bn

Year-one energy value₦58.6bn

Lifetime energy value₦2.78tn

NPV₦482bn

Median IRR103%

Median payback1.1 yr

Three ways to size Sule Tankarkar'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: 48.4 MWp
Capital cost: ₦53.6bn
Year 1 savings: ₦58.6bn/yr
NPV: ₦482bn
Median IRR: 103%
Median payback: 1.1 yr

The odds a rooftop in Sule Tankarkar pays back quickly

Of the 109,514 buildings in Sule Tankarkar with a modelled payback, 20.2% pay back inside five years and 5.2% inside three.

Create a free account

How much of Sule Tankarkar's demand actually gets met

Buildings in Sule Tankarkar consume 15.5 GWh/yr but want 22.9 GWh/yr. The 32% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Sule Tankarkar

Loading band economics…

How many rooftops in Sule Tankarkar 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 109,514 buildings with a modelled result out of 110,542 in Sule Tankarkar. 29,635 clear a positive NPV.

Payback

Under 3 years5,689 (5%)

Under 5 years22,131 (20%)

Under 7 years29,707 (27%)

Under 10 years40,479 (37%)

Return (IRR)

Above 10%36,630 (33%)

Above 15%29,635 (27%)

Above 20%24,353 (22%)

Above 25%18,335 (17%)

CO₂ avoided

14.8 kt/yr

Fuel avoided

3.48 million litres/yr

Energy unlocked

7.41 GWh/yr

Demand that is suppressed today

People served

176k

What hardware costs right now

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

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 Sule Tankarkar

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	38,192	812	₦1.08bn	₦1.08bn	5%	16.6 yr
E	35,003	1,720	₦2.55bn	₦2.21bn	5%	15.9 yr
C	31,248	2,695	₦3.75bn	₦3.46bn	7%	14.6 yr
B	3,194	424	₦736m	₦607m	27%	4.1 yr
A	2,905	84	₦303m	₦268m	23%	4.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	109,937	5,174	₦5.99bn	₦5.53bn	7%	15.4 yr
Anchor	245	225	₦2.03bn	₦1.69bn	87%	1.1 yr
Productive Use	123	118	₦46.2m	₦46.2m	65%	1.6 yr
Commercial General	109	96	₦271m	₦271m	59%	1.9 yr
Worship	89	85	₦26m	₦26m	65%	1.6 yr
Filling Station	17	16	₦11.6m	₦11.6m	65%	1.6 yr
Hospitality	14	13	₦39.5m	₦39.5m	65%	1.6 yr
Industrial	8	8	₦6.13m	₦6.01m	73%	1.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	73,796	2,240	₦365m	₦365m	3%	18.1 yr
30 50m2	16,449	1,272	₦331m	₦311m	11%	8.9 yr
50 100m2	12,958	1,160	₦832m	₦756m	25%	4.1 yr
100 250m2	5,905	765	₦2.56bn	₦2.4bn	31%	3.4 yr
250 1000m2	1,386	277	₦3.2bn	₦2.92bn	31%	3.4 yr
Over 1000m2	48	21	₦1.13bn	₦862m	33%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	91,542	3,662	₦5.5bn	₦5.33bn	5%	16.4 yr
Rural	8,204	1,635	₦772m	₦772m	21%	5.1 yr
Urban	7,627	78	₦1.49bn	₦1.02bn	9%	9.9 yr
Dense Urban	3,169	360	₦664m	₦500m	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	80,855	2,233	₦392m	₦392m	5%	17.6 yr
Residential Small	13,675	673	₦913m	₦809m	23%	4.6 yr
Residential Informal	8,023	1,905	₦920m	₦920m	27%	3.9 yr
Residential	7,384	363	₦3.77bn	₦3.41bn	29%	3.6 yr
Educational Facility	135	125	₦214m	₦214m	91%	1.1 yr
Institutional	118	107	₦1.27bn	₦1.01bn	59%	1.9 yr
Kiosk Shop	96	91	₦31.3m	₦31.3m	65%	1.6 yr
Place Of Worship	58	57	₦15.5m	₦15.5m	67%	1.6 yr
School	47	45	₦38.5m	₦38.5m	89%	1.1 yr
Healthcare Facility	30	25	₦701m	₦631m	57%	1.9 yr
Commercial	29	29	₦22.2m	₦22.2m	67%	1.6 yr
Clinic	22	19	₦61m	₦61m	53%	1.9 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	110,542	5,735	₦8.42bn	₦7.62bn

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	110,270	5,484	₦6.37bn	₦5.91bn	7%	15.4 yr
Enterprise	242	223	₦2.02bn	₦1.69bn	87%	1.1 yr
SME High	30	28	₦26.8m	₦26.8m	61%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	80,107	2,265	₦389m	₦389m
2.0	14,804	1,876	₦2.09bn	₦2.01bn
1.0	9,672	565	₦512m	₦416m
3.0	5,215	903	₦4.44bn	₦4.07bn
4.0	744	126	₦985m	₦739m