Plateau State

Rooftop solar in Bassa, Plateau: what the roofs are worth

Bassa has 107,138 buildings with a viable rooftop and 1.23 GWp of roof capacity. 16% run a generator, and together they spend ₦26.1bn a year on energy.

Viable buildings

107,138

Usable roof area

5.51 km²

1.23 GWp roof capacity

Energy spend

₦26.1bn/yr

22.7 GWh/yr burned on generators

Median payback

6.1 yr

Median IRR 17% (cash saved)

The savings bracket for Bassa

Approach B

Cash saved

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

Current energy spend₦26.1bn/yr

Year-one cash saved₦25.7bn

Lifetime cash saved₦1.38tn

NPV₦211bn

Median IRR17%

Median payback6.1 yr

Unlocked energy23.7 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity113 MWp

Capex₦120bn

Year-one energy value₦119bn

Lifetime energy value₦5.65tn

NPV₦966bn

Median IRR103%

Median payback1.1 yr

Three ways to size Bassa'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: 113 MWp
Capital cost: ₦120bn
Year 1 savings: ₦119bn/yr
NPV: ₦966bn
Median IRR: 103%
Median payback: 1.1 yr

The odds a rooftop in Bassa pays back quickly

Of the 104,939 buildings in Bassa with a modelled payback, 43.0% pay back inside five years and 14.0% inside three.

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How much of Bassa's demand actually gets met

Buildings in Bassa consume 46.1 GWh/yr but want 69.8 GWh/yr. The 34% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Bassa

Loading band economics…

How many rooftops in Bassa 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 104,939 buildings with a modelled result out of 107,138 in Bassa. 56,007 clear a positive NPV.

Payback

Under 3 years14,714 (14%)

Under 5 years45,110 (43%)

Under 7 years56,093 (53%)

Under 10 years62,810 (60%)

Return (IRR)

Above 10%61,080 (57%)

Above 15%56,007 (52%)

Above 20%48,054 (45%)

Above 25%40,541 (38%)

CO₂ avoided

49 kt/yr

Fuel avoided

12.1 million litres/yr

Energy unlocked

23.7 GWh/yr

Demand that is suppressed today

People served

403k

What hardware costs right now

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

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 Bassa

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
B	31,089	9,268	₦13.2bn	₦13bn	27%	3.9 yr
C	26,197	1,648	₦3.85bn	₦3.8bn	7%	14.4 yr
D	21,603	1,038	₦2.21bn	₦2.21bn	7%	14.9 yr
E	19,118	1,187	₦1.51bn	₦1.5bn	7%	14.9 yr
A	9,131	3,506	₦5.26bn	₦5.19bn	31%	3.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	105,507	15,528	₦18.5bn	₦18.3bn	17%	6.4 yr
Anchor	557	417	₦5.25bn	₦5.21bn	63%	1.6 yr
Worship	472	307	₦198m	₦198m	55%	1.9 yr
Commercial General	430	292	₦1.49bn	₦1.44bn	49%	2.1 yr
Industrial	146	81	₦426m	₦425m	45%	2.4 yr
Filling Station	15	11	₦34.1m	₦34.1m	49%	2.1 yr
Hospitality	8	8	₦122m	₦122m	65%	1.4 yr
Productive Use	3	3	₦995k	₦995k	71%	1.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	46,325	4,361	₦358m	₦358m	5%	16.9 yr
50 100m2	21,516	3,648	₦1.56bn	₦1.54bn	29%	3.9 yr
30 50m2	19,225	2,355	₦418m	₦410m	9%	9.4 yr
100 250m2	16,422	4,621	₦6.72bn	₦6.59bn	31%	3.4 yr
250 1000m2	3,504	1,579	₦11.2bn	₦11.1bn	33%	3.4 yr
Over 1000m2	146	83	₦5.83bn	₦5.73bn	53%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	37,998	1,955	₦9.98bn	₦9.65bn	7%	15.4 yr
Urban	34,359	3,873	₦8.1bn	₦8.07bn	17%	6.1 yr
Dense Urban	22,122	8,478	₦6.11bn	₦6.11bn	29%	3.6 yr
Rural	10,915	2,136	₦1.73bn	₦1.72bn	19%	5.9 yr
Urban Centre	1,744	205	₦163m	₦163m	19%	5.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	52,428	3,653	₦383m	₦383m	5%	16.1 yr
Residential Small	26,062	4,369	₦1.92bn	₦1.89bn	29%	3.9 yr
Residential	15,971	4,303	₦15.8bn	₦15.5bn	31%	3.4 yr
Residential Formal	10,942	3,186	₦469m	₦469m	25%	4.4 yr
Institutional	571	400	₦4.76bn	₦4.67bn	53%	2.1 yr
Educational Facility	190	151	₦424m	₦424m	85%	1.1 yr
School	159	123	₦254m	₦254m	81%	1.4 yr
Worship Center	156	99	₦44.9m	₦44.9m	57%	1.9 yr
Place Of Worship	155	103	₦36.2m	₦36.2m	57%	1.9 yr
Industrial Site	93	64	₦330m	₦329m	55%	1.9 yr
Healthcare Facility	69	41	₦1.01bn	₦1.01bn	45%	2.4 yr
Clinic	55	35	₦134m	₦134m	47%	2.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	107,059	16,619	₦26bn	₦25.7bn
Industrial	79	28	₦40.4m	₦40.4m

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	106,451	16,145	₦20.4bn	₦20.1bn	17%	6.1 yr
Enterprise	657	481	₦5.58bn	₦5.54bn	61%	1.6 yr
SME High	30	21	₦107m	₦107m	49%	2.1 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	52,514	3,694	₦394m	₦394m
2.0	19,614	4,639	₦3.85bn	₦3.8bn
1.0	16,585	1,876	₦807m	₦801m
3.0	11,516	4,296	₦20.3bn	₦20bn
4.0	6,907	2,140	₦598m	₦598m
5.0	2	2	₦119m	₦119m