Anambra State

Rooftop solar in Awka South, Anambra: what the roofs are worth

Awka South has 108,869 buildings with a viable rooftop and 2.64 GWp of roof capacity. 30% run a generator, and together they spend ₦55.9bn a year on energy.

Viable buildings

108,869

Usable roof area

11.7 km²

2.64 GWp roof capacity

Energy spend

₦55.9bn/yr

42.6 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Awka South

Approach B

Cash saved

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

Current energy spend₦55.9bn/yr

Year-one cash saved₦55.2bn

Lifetime cash saved₦3.08tn

NPV₦430bn

Median IRR25%

Median payback4.4 yr

Unlocked energy67.8 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity268 MWp

Capex₦246bn

Year-one energy value₦150bn

Lifetime energy value₦6.97tn

NPV₦1.1tn

Median IRR65%

Median payback1.6 yr

Three ways to size Awka South'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: 268 MWp
Capital cost: ₦246bn
Year 1 savings: ₦150bn/yr
NPV: ₦1.1tn
Median IRR: 65%
Median payback: 1.6 yr

The odds a rooftop in Awka South pays back quickly

Of the 106,330 buildings in Awka South with a modelled payback, 64.2% pay back inside five years and 23.8% inside three.

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How much of Awka South's demand actually gets met

Buildings in Awka South consume 134 GWh/yr but want 202 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 Awka South

Loading band economics…

How many rooftops in Awka South 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 106,330 buildings with a modelled result out of 108,869 in Awka South. 86,159 clear a positive NPV.

Payback

Under 3 years25,262 (24%)

Under 5 years68,310 (64%)

Under 7 years85,987 (81%)

Under 10 years96,882 (91%)

Return (IRR)

Above 10%95,605 (88%)

Above 15%86,159 (79%)

Above 20%73,542 (68%)

Above 25%44,925 (41%)

CO₂ avoided

116 kt/yr

Fuel avoided

20 million litres/yr

Energy unlocked

67.8 GWh/yr

Demand that is suppressed today

People served

225k

What hardware costs right now

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

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 Awka South

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
A	78,682	17,960	₦32.4bn	₦32bn	25%	4.4 yr
B	21,014	10,054	₦17.6bn	₦17.6bn	27%	4.1 yr
D	3,936	1,828	₦1.93bn	₦1.79bn	25%	4.4 yr
C	2,686	1,339	₦2.41bn	₦2.35bn	33%	2.6 yr
E	2,551	1,069	₦1.6bn	₦1.51bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	100,089	29,029	₦26.3bn	₦26bn	25%	4.4 yr
Commercial General	4,533	1,648	₦17.6bn	₦17.5bn	35%	3.1 yr
Commercial Retail	2,461	914	₦470m	₦470m	33%	3.4 yr
Anchor	672	228	₦7.17bn	₦7bn	39%	2.6 yr
Industrial	407	240	₦2.53bn	₦2.44bn	43%	2.6 yr
Worship	398	130	₦342m	₦342m	33%	3.4 yr
Hospitality	200	33	₦1.39bn	₦1.33bn	33%	3.1 yr
Mall Retail	39	3	₦51.1m	₦51.1m	33%	3.1 yr
Filling Station	36	21	₦47.5m	₦47.5m	41%	2.6 yr
Productive Use	31	4	₦10.6m	₦10.6m	33%	3.4 yr
Automotive	3	0	₦649k	₦649k	29%	3.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	35,878	10,380	₦14.8bn	₦14.7bn	25%	4.4 yr
50 100m2	22,316	6,198	₦2.43bn	₦2.42bn	21%	4.9 yr
Under 30m2	21,553	6,190	₦724m	₦690m	13%	6.6 yr
30 50m2	14,650	4,133	₦800m	₦797m	19%	5.9 yr
250 1000m2	14,189	5,224	₦26.7bn	₦26.5bn	25%	4.4 yr
Over 1000m2	283	125	₦10.4bn	₦10.1bn	35%	3.1 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	99,388	27,835	₦45.1bn	₦44.7bn	25%	4.4 yr
Unclassified	5,286	1,775	₦4.42bn	₦4.2bn	25%	4.4 yr
Urban	2,928	1,810	₦5.63bn	₦5.47bn	49%	2.1 yr
Dense Urban	1,267	830	₦798m	₦798m	69%	1.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Informal	28,815	5,035	₦3bn	₦2.99bn	21%	4.9 yr
Residential Formal	28,544	6,900	₦2.63bn	₦2.61bn	23%	4.6 yr
Residential Small	15,623	6,378	₦1.9bn	₦1.9bn	25%	4.4 yr
Residential	14,790	6,421	₦18bn	₦17.7bn	25%	4.4 yr
Shed	8,170	3,267	₦364m	₦364m	21%	5.4 yr
Apartment	2,814	681	₦231m	₦231m	25%	4.4 yr
Kiosk Shop	2,476	917	₦472m	₦472m	33%	3.4 yr
Commercial	1,696	762	₦9.08bn	₦9.03bn	35%	3.1 yr
Commercial Corridor	1,411	381	₦5.57bn	₦5.54bn	35%	3.1 yr
Duplex	1,147	272	₦91.2m	₦91.2m	25%	4.4 yr
Institutional	679	331	₦6.07bn	₦5.98bn	31%	3.4 yr
Unknown	617	197	₦1.34bn	₦1.34bn	31%	3.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	108,247	32,048	₦53.6bn	₦52.9bn
Industrial	616	201	₦2.32bn	₦2.28bn
Retail	6	1	₦254k	₦254k

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	104,531	30,613	₦30.9bn	₦30.5bn	25%	4.4 yr
SME High	3,300	1,179	₦15.4bn	₦15.3bn	35%	3.1 yr
Enterprise	1,038	458	₦9.61bn	₦9.35bn	41%	2.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
4.0	44,529	9,816	₦15.1bn	₦15bn
3.0	35,713	12,884	₦28.2bn	₦27.7bn
2.0	15,698	4,607	₦1.33bn	₦1.33bn
0.0	7,996	3,268	₦382m	₦382m
1.0	3,052	1,069	₦234m	₦234m
5.0	1,459	428	₦5.09bn	₦5.07bn
6.0	422	178	₦5.56bn	₦5.49bn