Jigawa State

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

Ringim has 145,084 buildings with a viable rooftop and 1.09 GWp of roof capacity. 6% run a generator, and together they spend ₦32bn a year on energy.

Viable buildings

145,084

Usable roof area

4.91 km²

1.09 GWp roof capacity

Energy spend

₦32bn/yr

29.6 GWh/yr burned on generators

Median payback

8.6 yr

Median IRR 11% (cash saved)

The savings bracket for Ringim

Approach B

Cash saved

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

Current energy spend₦32bn/yr

Year-one cash saved₦30bn

Lifetime cash saved₦1.51tn

NPV₦230bn

Median IRR11%

Median payback8.6 yr

Unlocked energy18.3 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity126 MWp

Capex₦136bn

Year-one energy value₦134bn

Lifetime energy value₦6.3tn

NPV₦1.08tn

Median IRR103%

Median payback1.1 yr

Three ways to size Ringim'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: 126 MWp
Capital cost: ₦136bn
Year 1 savings: ₦134bn/yr
NPV: ₦1.08tn
Median IRR: 103%
Median payback: 1.1 yr

The odds a rooftop in Ringim pays back quickly

Of the 143,533 buildings in Ringim with a modelled payback, 32.8% pay back inside five years and 5.6% inside three.

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How much of Ringim's demand actually gets met

Buildings in Ringim consume 65.6 GWh/yr but want 83.9 GWh/yr. The 22% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Ringim

Loading band economics…

How many rooftops in Ringim 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 143,533 buildings with a modelled result out of 145,084 in Ringim. 65,417 clear a positive NPV.

Payback

Under 3 years8,051 (6%)

Under 5 years47,078 (33%)

Under 7 years65,556 (46%)

Under 10 years83,662 (58%)

Return (IRR)

Above 10%77,917 (54%)

Above 15%65,417 (45%)

Above 20%52,919 (36%)

Above 25%36,697 (25%)

CO₂ avoided

52.3 kt/yr

Fuel avoided

12.2 million litres/yr

Energy unlocked

18.3 GWh/yr

Demand that is suppressed today

People served

389k

What hardware costs right now

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

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 Ringim

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	43,128	1,043	₦4.8bn	₦4.59bn	11%	9.1 yr
D	41,715	2,621	₦4.82bn	₦4.1bn	9%	13.1 yr
E	37,666	1,735	₦4.43bn	₦4.02bn	11%	9.4 yr
A	13,672	1,386	₦4.3bn	₦4.19bn	21%	4.9 yr
B	8,903	1,231	₦13.7bn	₦13.1bn	27%	4.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	144,551	7,617	₦15.7bn	₦14.7bn	11%	8.6 yr
Anchor	292	219	₦16bn	₦15bn	67%	1.6 yr
Commercial General	98	64	₦188m	₦188m	45%	2.4 yr
Worship	89	71	₦153m	₦121m	61%	1.6 yr
Productive Use	25	25	₦8.07m	₦8.07m	69%	1.6 yr
Industrial	15	8	₦7.27m	₦7.27m	53%	1.9 yr
Hospitality	12	11	₦25.9m	₦25.9m	55%	1.6 yr
Commercial Retail	2	1	₦218k	₦218k	21%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	77,256	2,960	₦731m	₦574m	7%	15.6 yr
30 50m2	30,542	1,803	₦584m	₦584m	13%	7.9 yr
50 100m2	22,215	1,452	₦1.23bn	₦1.23bn	27%	4.1 yr
100 250m2	10,987	1,109	₦3.85bn	₦3.32bn	31%	3.4 yr
250 1000m2	3,733	580	₦7.92bn	₦7.65bn	31%	3.4 yr
Over 1000m2	351	112	₦17.7bn	₦16.7bn	33%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	69,169	2,634	₦19.7bn	₦18.2bn	17%	6.4 yr
Unclassified	30,517	1,053	₦4.55bn	₦4.51bn	7%	15.6 yr
Rural	30,497	2,510	₦3bn	₦2.67bn	11%	8.9 yr
Dense Urban	14,901	1,819	₦4.72bn	₦4.65bn	23%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	93,378	3,749	₦773m	₦773m	7%	14.4 yr
Residential Informal	24,506	2,615	₦6.2bn	₦6.04bn	25%	4.1 yr
Residential Small	17,302	703	₦855m	₦855m	25%	4.4 yr
Residential	9,365	550	₦7.82bn	₦7.02bn	31%	3.4 yr
Institutional	178	128	₦15.7bn	₦14.7bn	53%	1.9 yr
Educational Facility	129	101	₦205m	₦205m	77%	1.4 yr
School	42	29	₦27.7m	₦27.7m	81%	1.4 yr
Place Of Worship	38	33	₦5.49m	₦5.49m	63%	1.6 yr
Worship Center	32	24	₦13.7m	₦13.7m	61%	1.6 yr
Healthcare Facility	30	24	₦271m	₦270m	57%	1.9 yr
Kiosk Shop	22	21	₦6.64m	₦6.64m	67%	1.6 yr
Unknown	15	4	₦23m	₦23m	33%	3.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	144,914	7,873	₦20.6bn	₦19.1bn
Industrial	170	143	₦11.4bn	₦11bn

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	144,786	7,793	₦16bn	₦15bn	11%	8.6 yr
Enterprise	295	220	₦16bn	₦15bn	67%	1.6 yr
SME High	3	3	₦3.33m	₦3.33m	67%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	86,258	3,494	₦680m	₦680m
2.0	23,850	1,860	₦3.01bn	₦2.47bn
1.0	17,214	740	₦576m	₦529m
3.0	13,508	1,379	₦13bn	₦12.2bn
4.0	4,253	542	₦14.8bn	₦14.2bn
6.0	1	1	₦22m	₦22m