Katsina State

Rooftop solar in Faskari, Katsina: what the roofs are worth

Faskari has 113,331 buildings with a viable rooftop and 1.12 GWp of roof capacity. 15% run a generator, and together they spend ₦44.8bn a year on energy.

Viable buildings

113,331

Usable roof area

5.02 km²

1.12 GWp roof capacity

Energy spend

₦44.8bn/yr

47 GWh/yr burned on generators

Median payback

5.6 yr

Median IRR 19% (cash saved)

The savings bracket for Faskari

Approach B

Cash saved

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

Current energy spend₦44.8bn/yr

Year-one cash saved₦40.2bn

Lifetime cash saved₦2.03tn

NPV₦322bn

Median IRR19%

Median payback5.6 yr

Unlocked energy27.5 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity128 MWp

Capex₦135bn

Year-one energy value₦131bn

Lifetime energy value₦6.09tn

NPV₦1.05tn

Median IRR101%

Median payback1.1 yr

Three ways to size Faskari'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: 128 MWp
Capital cost: ₦135bn
Year 1 savings: ₦131bn/yr
NPV: ₦1.05tn
Median IRR: 101%
Median payback: 1.1 yr

The odds a rooftop in Faskari pays back quickly

Of the 111,507 buildings in Faskari with a modelled payback, 41.7% pay back inside five years and 15.4% inside three.

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How much of Faskari's demand actually gets met

Buildings in Faskari consume 84.1 GWh/yr but want 112 GWh/yr. The 25% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Faskari

Loading band economics…

How many rooftops in Faskari 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 111,507 buildings with a modelled result out of 113,331 in Faskari. 66,650 clear a positive NPV.

Payback

Under 3 years17,132 (15%)

Under 5 years46,508 (42%)

Under 7 years66,814 (60%)

Under 10 years84,234 (76%)

Return (IRR)

Above 10%80,230 (71%)

Above 15%66,650 (59%)

Above 20%52,927 (47%)

Above 25%36,019 (32%)

CO₂ avoided

68.6 kt/yr

Fuel avoided

17.3 million litres/yr

Energy unlocked

27.5 GWh/yr

Demand that is suppressed today

People served

258k

What hardware costs right now

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

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 Faskari

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	37,023	8,429	₦20.1bn	₦18.7bn	21%	5.1 yr
D	29,985	4,851	₦13.8bn	₦11.7bn	13%	7.9 yr
E	27,970	3,223	₦8bn	₦7.13bn	15%	6.6 yr
B	18,353	761	₦2.88bn	₦2.67bn	21%	5.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	112,164	16,407	₦16.8bn	₦16.6bn	19%	5.6 yr
Anchor	449	349	₦25.6bn	₦21.3bn	65%	1.6 yr
Commercial Retail	359	272	₦67m	₦67m	71%	1.4 yr
Commercial General	312	206	₦2.31bn	₦2.17bn	61%	1.6 yr
Worship	32	20	₦19.1m	₦19.1m	39%	2.9 yr
Industrial	10	8	₦11.2m	₦11.1m	57%	1.6 yr
Filling Station	3	0	₦672k	₦672k	37%	2.9 yr
Mall Retail	2	2	₦585k	₦585k	53%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	49,886	6,523	₦794m	₦794m	9%	9.6 yr
30 50m2	24,695	3,914	₦795m	₦795m	19%	5.9 yr
50 100m2	23,651	3,716	₦1.84bn	₦1.84bn	23%	4.6 yr
100 250m2	10,498	1,909	₦3.43bn	₦3.43bn	31%	3.6 yr
250 1000m2	3,783	877	₦8.4bn	₦8.22bn	31%	3.4 yr
Over 1000m2	818	325	₦29.5bn	₦25.1bn	33%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Dense Urban	38,645	5,632	₦12bn	₦11.4bn	21%	5.1 yr
Rural	28,800	2,133	₦12.7bn	₦10.5bn	17%	5.9 yr
Unclassified	23,145	754	₦5.64bn	₦5.07bn	7%	13.9 yr
Urban	22,741	8,745	₦14.5bn	₦13.3bn	27%	4.1 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	61,529	8,110	₦1.11bn	₦1.11bn	11%	8.4 yr
Residential Informal	28,792	3,682	₦4.12bn	₦4.12bn	23%	4.9 yr
Residential Small	15,530	3,208	₦1.58bn	₦1.58bn	25%	4.4 yr
Residential	6,313	1,407	₦10bn	₦9.82bn	31%	3.4 yr
Kiosk Shop	359	272	₦67m	₦67m	71%	1.4 yr
Institutional	340	256	₦25.2bn	₦21bn	61%	1.6 yr
Commercial Corridor	147	85	₦1.05bn	₦1.05bn	73%	1.4 yr
Educational Facility	114	91	₦225m	₦225m	87%	1.1 yr
Healthcare Facility	57	48	₦252m	₦252m	57%	1.9 yr
School	37	28	₦39m	₦39m	87%	1.1 yr
Commercial	35	29	₦707m	₦574m	77%	1.4 yr
Unknown	22	7	₦290m	₦290m	33%	3.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	113,331	17,264	₦44.8bn	₦40.2bn

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	112,688	16,793	₦17.5bn	₦17.3bn	19%	5.6 yr
Enterprise	456	355	₦25.6bn	₦21.3bn	65%	1.6 yr
SME High	187	116	₦1.76bn	₦1.62bn	73%	1.4 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	52,962	7,662	₦1bn	₦1bn
2.0	23,534	3,740	₦2.79bn	₦2.79bn
1.0	17,338	2,361	₦794m	₦794m
3.0	13,955	2,657	₦26.4bn	₦23bn
4.0	5,484	825	₦12.7bn	₦11.5bn
5.0	48	18	₦975m	₦840m
6.0	10	1	₦194m	₦191m