Taraba State

Rooftop solar in Yorro, Taraba: what the roofs are worth

Yorro has 70,690 buildings with a viable rooftop and 272 MWp of roof capacity. 5% run a generator, and together they spend ₦5.47bn a year on energy.

Viable buildings

70,690

Usable roof area

1.23 km²

272 MWp roof capacity

Energy spend

₦5.47bn/yr

4.75 GWh/yr burned on generators

Median payback

18.4 yr

Median IRR 3% (cash saved)

The savings bracket for Yorro

Approach B

Cash saved

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

Current energy spend₦5.47bn/yr

Year-one cash saved₦5.35bn

Lifetime cash saved₦288bn

NPV₦41.9bn

Median IRR3%

Median payback18.4 yr

Unlocked energy5.08 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity29.4 MWp

Capex₦31.9bn

Year-one energy value₦30.5bn

Lifetime energy value₦1.45tn

NPV₦247bn

Median IRR93%

Median payback1.1 yr

Three ways to size Yorro'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: 29.4 MWp
Capital cost: ₦31.9bn
Year 1 savings: ₦30.5bn/yr
NPV: ₦247bn
Median IRR: 93%
Median payback: 1.1 yr

The odds a rooftop in Yorro pays back quickly

Of the 68,356 buildings in Yorro with a modelled payback, 14.4% pay back inside five years and 6.0% inside three.

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How much of Yorro's demand actually gets met

Buildings in Yorro consume 9.51 GWh/yr but want 14.6 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 Yorro

Loading band economics…

How many rooftops in Yorro 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 68,356 buildings with a modelled result out of 70,690 in Yorro. 12,888 clear a positive NPV.

Payback

Under 3 years4,113 (6%)

Under 5 years9,862 (14%)

Under 7 years12,934 (19%)

Under 10 years16,760 (25%)

Return (IRR)

Above 10%15,978 (23%)

Above 15%12,888 (18%)

Above 20%10,335 (15%)

Above 25%9,287 (13%)

CO₂ avoided

10.3 kt/yr

Fuel avoided

2.53 million litres/yr

Energy unlocked

5.08 GWh/yr

Demand that is suppressed today

People served

94.4k

What hardware costs right now

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

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 Yorro

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	27,330	743	₦1.03bn	₦912m	3%	19.1 yr
E	20,716	655	₦715m	₦715m	3%	19.1 yr
C	14,629	656	₦1.2bn	₦1.2bn	5%	17.1 yr
B	7,430	1,214	₦2.16bn	₦2.15bn	17%	6.4 yr
A	585	512	₦365m	₦365m	63%	1.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	68,098	3,047	₦3.95bn	₦3.82bn	3%	18.6 yr
Commercial Retail	1,531	145	₦48.5m	₦48.5m	35%	3.1 yr
Commercial General	474	163	₦364m	₦364m	37%	2.9 yr
Anchor	305	219	₦1.05bn	₦1.05bn	55%	1.9 yr
Worship	228	182	₦38m	₦38m	51%	2.1 yr
Industrial	51	23	₦25.5m	₦25.5m	39%	2.6 yr
Filling Station	3	1	₦251k	₦251k	37%	2.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	60,235	1,709	₦255m	₦255m	3%	19.1 yr
50 100m2	3,919	645	₦481m	₦477m	29%	3.6 yr
30 50m2	3,716	395	₦110m	₦110m	11%	8.9 yr
100 250m2	2,274	718	₦1.68bn	₦1.56bn	29%	3.6 yr
250 1000m2	528	299	₦2.42bn	₦2.42bn	63%	1.6 yr
Over 1000m2	18	14	₦533m	₦533m	67%	1.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	39,221	926	₦1.52bn	₦1.49bn	3%	19.6 yr
Rural	16,854	753	₦722m	₦630m	5%	17.9 yr
Urban	14,615	2,101	₦3.23bn	₦3.23bn	15%	6.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	56,835	1,300	₦192m	₦192m	3%	19.1 yr
Residential	6,008	850	₦3.2bn	₦3.08bn	13%	7.1 yr
Residential Small	5,252	896	₦552m	₦548m	29%	3.6 yr
Kiosk Shop	1,531	145	₦48.5m	₦48.5m	35%	3.1 yr
Commercial	271	37	₦135m	₦135m	37%	2.9 yr
Institutional	255	187	₦576m	₦576m	53%	2.1 yr
Educational Facility	88	69	₦194m	₦194m	79%	1.4 yr
Worship Center	77	61	₦7.78m	₦7.78m	55%	1.9 yr
Place Of Worship	75	61	₦4.66m	₦4.66m	49%	2.1 yr
Healthcare Facility	59	37	₦280m	₦280m	51%	2.1 yr
School	53	39	₦63.4m	₦63.4m	75%	1.4 yr
Clinic	48	31	₦97.8m	₦97.8m	47%	2.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	70,473	3,742	₦5.45bn	₦5.33bn
Farmland	217	38	₦22.2m	₦22.2m

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	70,071	3,505	₦4.27bn	₦4.15bn	3%	18.4 yr
Enterprise	331	235	₦1.06bn	₦1.06bn	55%	1.9 yr
SME High	288	40	₦139m	₦139m	37%	2.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	56,926	1,367	₦189m	₦189m
2.0	5,524	718	₦1.16bn	₦1.07bn
1.0	4,365	597	₦208m	₦207m
3.0	3,642	1,091	₦3.79bn	₦3.76bn
5.0	168	1	₦67.1m	₦67.1m
4.0	55	6	₦34m	₦34m
6.0	10	0	₦19m	₦19m