Plateau State

Rooftop solar in Langtang North, Plateau: what the roofs are worth

Langtang North has 140,000 buildings with a viable rooftop and 810 MWp of roof capacity. 12% run a generator, and together they spend ₦12bn a year on energy.

Viable buildings

140,000

Usable roof area

3.64 km²

810 MWp roof capacity

Energy spend

₦12bn/yr

11.4 GWh/yr burned on generators

Median payback

16.6 yr

Median IRR 5% (cash saved)

The savings bracket for Langtang North

Approach B

Cash saved

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

Current energy spend₦12bn/yr

Year-one cash saved₦11.8bn

Lifetime cash saved₦630bn

NPV₦95.6bn

Median IRR5%

Median payback16.6 yr

Unlocked energy12.6 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity66.6 MWp

Capex₦71.6bn

Year-one energy value₦72.2bn

Lifetime energy value₦3.44tn

NPV₦590bn

Median IRR99%

Median payback1.1 yr

Three ways to size Langtang North'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: 66.6 MWp
Capital cost: ₦71.6bn
Year 1 savings: ₦72.2bn/yr
NPV: ₦590bn
Median IRR: 99%
Median payback: 1.1 yr

The odds a rooftop in Langtang North pays back quickly

Of the 138,708 buildings in Langtang North with a modelled payback, 23.1% pay back inside five years and 11.7% inside three.

Create a free account

How much of Langtang North's demand actually gets met

Buildings in Langtang North consume 19.9 GWh/yr but want 32.5 GWh/yr. The 39% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Langtang North

Loading band economics…

How many rooftops in Langtang North 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 138,708 buildings with a modelled result out of 140,000 in Langtang North. 38,359 clear a positive NPV.

Payback

Under 3 years16,206 (12%)

Under 5 years32,102 (23%)

Under 7 years38,402 (28%)

Under 10 years45,254 (33%)

Return (IRR)

Above 10%43,013 (31%)

Above 15%38,359 (27%)

Above 20%33,767 (24%)

Above 25%28,840 (21%)

CO₂ avoided

22.6 kt/yr

Fuel avoided

5.63 million litres/yr

Energy unlocked

12.6 GWh/yr

Demand that is suppressed today

People served

182k

What hardware costs right now

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

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 Langtang North

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	56,016	7,875	₦5.03bn	₦5.03bn	5%	15.9 yr
E	41,367	4,153	₦3.88bn	₦3.7bn	5%	16.9 yr
D	40,967	4,019	₦2.88bn	₦2.85bn	5%	17.1 yr
B	1,650	286	₦179m	₦179m	19%	5.9 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	137,335	14,122	₦7.54bn	₦7.51bn	5%	16.6 yr
Commercial Retail	914	820	₦78.3m	₦78.3m	63%	1.6 yr
Commercial General	696	611	₦1.23bn	₦1.23bn	57%	1.9 yr
Anchor	569	441	₦2.78bn	₦2.59bn	65%	1.6 yr
Worship	425	300	₦263m	₦263m	59%	1.9 yr
Industrial	42	27	₦66m	₦66m	63%	1.6 yr
Hospitality	10	5	₦6.16m	₦6.16m	37%	2.4 yr
Filling Station	9	7	₦5.49m	₦5.49m	51%	2.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	100,475	7,696	₦662m	₦662m	5%	17.9 yr
50 100m2	15,529	3,043	₦1.34bn	₦1.34bn	27%	4.1 yr
30 50m2	12,823	2,167	₦359m	₦359m	11%	9.4 yr
100 250m2	9,629	2,698	₦3.89bn	₦3.86bn	29%	3.6 yr
250 1000m2	1,488	697	₦3.94bn	₦3.94bn	31%	3.6 yr
Over 1000m2	56	32	₦1.78bn	₦1.6bn	65%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	53,287	6,871	₦4.93bn	₦4.93bn	5%	16.1 yr
Unclassified	49,690	2,731	₦2.93bn	₦2.72bn	3%	18.4 yr
Urban Centre	22,440	4,786	₦3.32bn	₦3.32bn	17%	5.9 yr
Rural	14,583	1,945	₦792m	₦792m	5%	16.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	102,309	7,041	₦632m	₦632m	5%	17.6 yr
Residential Small	20,172	3,372	₦1.39bn	₦1.39bn	25%	4.4 yr
Residential	10,398	2,978	₦5.31bn	₦5.28bn	29%	3.6 yr
Residential Informal	4,454	731	₦205m	₦205m	21%	4.9 yr
Kiosk Shop	914	820	₦78.3m	₦78.3m	63%	1.6 yr
Institutional	476	357	₦1.99bn	₦1.81bn	59%	1.9 yr
Commercial Corridor	370	356	₦632m	₦632m	45%	2.4 yr
Educational Facility	197	162	₦487m	₦487m	89%	1.1 yr
School	163	136	₦252m	₦252m	87%	1.1 yr
Worship Center	154	106	₦48.3m	₦48.3m	65%	1.6 yr
Place Of Worship	122	89	₦27.3m	₦27.3m	63%	1.6 yr
Healthcare Facility	86	57	₦647m	₦647m	53%	1.9 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	140,000	16,333	₦12bn	₦11.8bn

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	138,993	15,487	₦8.44bn	₦8.41bn	5%	16.6 yr
Enterprise	611	468	₦2.84bn	₦2.66bn	65%	1.6 yr
SME High	396	378	₦686m	₦686m	45%	2.4 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	102,399	7,092	₦636m	₦636m
2.0	15,039	3,289	₦2.25bn	₦2.25bn
3.0	10,681	3,095	₦7.46bn	₦7.25bn
1.0	9,992	2,419	₦630m	₦630m
4.0	1,804	356	₦763m	₦763m
5.0	77	75	₦189m	₦189m
6.0	8	7	₦39.3m	₦39.3m