Anambra State

Rooftop solar in Anambra East, Anambra: what the roofs are worth

Anambra East has 52,794 buildings with a viable rooftop and 1.27 GWp of roof capacity. 36% run a generator, and together they spend ₦25.9bn a year on energy.

Viable buildings

52,794

Usable roof area

5.67 km²

1.27 GWp roof capacity

Energy spend

₦25.9bn/yr

24.1 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Anambra East

Approach B

Cash saved

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

Current energy spend₦25.9bn/yr

Year-one cash saved₦23.5bn

Lifetime cash saved₦1.23tn

NPV₦187bn

Median IRR25%

Median payback4.4 yr

Unlocked energy18.9 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity79.5 MWp

Capex₦78bn

Year-one energy value₦60.2bn

Lifetime energy value₦2.83tn

NPV₦468bn

Median IRR81%

Median payback1.4 yr

Three ways to size Anambra East'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: 79.5 MWp
Capital cost: ₦78bn
Year 1 savings: ₦60.2bn/yr
NPV: ₦468bn
Median IRR: 81%
Median payback: 1.4 yr

The odds a rooftop in Anambra East pays back quickly

Of the 51,450 buildings in Anambra East with a modelled payback, 61.7% pay back inside five years and 33.1% inside three.

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How much of Anambra East's demand actually gets met

Buildings in Anambra East consume 41 GWh/yr but want 59.9 GWh/yr. The 32% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Anambra East

Loading band economics…

How many rooftops in Anambra East 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 51,450 buildings with a modelled result out of 52,794 in Anambra East. 40,146 clear a positive NPV.

Payback

Under 3 years17,055 (33%)

Under 5 years31,760 (62%)

Under 7 years40,061 (78%)

Under 10 years45,030 (88%)

Return (IRR)

Above 10%44,371 (84%)

Above 15%40,146 (76%)

Above 20%33,908 (64%)

Above 25%26,560 (50%)

CO₂ avoided

42.6 kt/yr

Fuel avoided

11.4 million litres/yr

Energy unlocked

18.9 GWh/yr

Demand that is suppressed today

People served

126k

What hardware costs right now

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

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 Anambra East

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
B	25,688	9,260	₦6.51bn	₦6.49bn	25%	4.4 yr
C	15,267	6,972	₦7.9bn	₦7.89bn	25%	4.4 yr
A	4,608	290	₦334m	₦334m	19%	5.4 yr
E	3,735	1,436	₦7.99bn	₦5.56bn	23%	4.4 yr
D	3,496	994	₦3.2bn	₦3.19bn	13%	7.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	51,183	17,928	₦17.6bn	₦15.2bn	25%	4.4 yr
Commercial General	718	471	₦2.38bn	₦2.38bn	41%	2.6 yr
Industrial	284	160	₦775m	₦770m	43%	2.4 yr
Anchor	251	154	₦5.01bn	₦4.98bn	45%	2.4 yr
Commercial Retail	228	164	₦36.4m	₦36.4m	41%	2.6 yr
Worship	114	70	₦95.1m	₦95.1m	43%	2.4 yr
Filling Station	14	5	₦8.23m	₦8.23m	33%	3.1 yr
Mall Retail	1	0	₦646k	₦646k	35%	3.1 yr
Productive Use	1	0	₦151k	₦151k	33%	3.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	20,401	7,471	₦8.39bn	₦8.09bn	25%	4.4 yr
50 100m2	10,150	3,455	₦1.15bn	₦1.13bn	21%	5.1 yr
Under 30m2	9,580	3,205	₦284m	₦279m	13%	6.6 yr
30 50m2	6,711	2,431	₦429m	₦414m	19%	5.9 yr
250 1000m2	5,841	2,324	₦10.3bn	₦8.66bn	25%	4.4 yr
Over 1000m2	111	66	₦5.41bn	₦4.9bn	45%	2.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	20,360	5,907	₦4.41bn	₦4.41bn	25%	4.4 yr
Urban	14,049	7,225	₦9.18bn	₦9.17bn	41%	2.6 yr
Unclassified	8,138	2,503	₦5.48bn	₦5.23bn	19%	5.6 yr
Dense Urban	7,886	2,705	₦1.81bn	₦1.81bn	25%	4.4 yr
Rural	2,361	612	₦5.06bn	₦2.85bn	17%	6.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	13,496	6,045	₦14.7bn	₦12.3bn	25%	4.4 yr
Residential Small	12,924	5,473	₦1.66bn	₦1.62bn	25%	4.4 yr
Residential Formal	12,149	2,036	₦607m	₦607m	21%	4.9 yr
Shed	8,283	3,073	₦284m	₦284m	19%	5.9 yr
Apartment	1,876	263	₦68.3m	₦68.3m	23%	4.6 yr
Residential Informal	1,763	880	₦237m	₦237m	25%	4.4 yr
Duplex	579	109	₦30.5m	₦30.5m	25%	4.4 yr
Institutional	372	227	₦5.12bn	₦5.1bn	39%	2.6 yr
Commercial	269	179	₦782m	₦782m	39%	2.6 yr
Kiosk Shop	228	164	₦36.5m	₦36.5m	41%	2.6 yr
Industrial Site	211	124	₦708m	₦703m	47%	2.4 yr
Agricultural	113	49	₦28.6m	₦28.6m	29%	3.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	52,786	18,952	₦25.9bn	₦23.5bn
Industrial	5	0	₦68.2k	₦68.2k
Farmland	2	0	₦7.4k	₦7.4k
Farmyard	1	0	₦131k	₦131k

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	51,881	18,364	₦18.8bn	₦16.4bn	25%	4.4 yr
Enterprise	535	314	₦5.79bn	₦5.75bn	43%	2.4 yr
SME High	378	274	₦1.31bn	₦1.31bn	47%	2.4 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	22,650	10,124	₦21.8bn	₦19.4bn
4.0	14,667	2,836	₦2.48bn	₦2.48bn
0.0	8,375	3,115	₦309m	₦309m
2.0	6,127	2,464	₦1.03bn	₦957m
1.0	963	409	₦144m	₦138m
5.0	10	4	₦177m	₦177m
6.0	2	0	₦7.31m	₦7.31m