Anambra State

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

Anaocha has 77,690 buildings with a viable rooftop and 1.69 GWp of roof capacity. 38% run a generator, and together they spend ₦48.2bn a year on energy.

Viable buildings

77,690

Usable roof area

7.54 km²

1.69 GWp roof capacity

Energy spend

₦48.2bn/yr

45 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Anaocha

Approach B

Cash saved

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

Current energy spend₦48.2bn/yr

Year-one cash saved₦47.7bn

Lifetime cash saved₦2.48tn

NPV₦384bn

Median IRR25%

Median payback4.4 yr

Unlocked energy38.3 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity173 MWp

Capex₦175bn

Year-one energy value₦145bn

Lifetime energy value₦6.9tn

NPV₦1.15tn

Median IRR97%

Median payback1.1 yr

Three ways to size Anaocha'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: 173 MWp
Capital cost: ₦175bn
Year 1 savings: ₦145bn/yr
NPV: ₦1.15tn
Median IRR: 97%
Median payback: 1.1 yr

The odds a rooftop in Anaocha pays back quickly

Of the 77,410 buildings in Anaocha with a modelled payback, 68.5% pay back inside five years and 37.1% inside three.

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How much of Anaocha's demand actually gets met

Buildings in Anaocha consume 73.4 GWh/yr but want 112 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 Anaocha

Loading band economics…

How many rooftops in Anaocha 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 77,410 buildings with a modelled result out of 77,690 in Anaocha. 64,716 clear a positive NPV.

Payback

Under 3 years28,755 (37%)

Under 5 years53,000 (68%)

Under 7 years64,616 (83%)

Under 10 years70,709 (91%)

Return (IRR)

Above 10%69,398 (89%)

Above 15%64,716 (83%)

Above 20%56,489 (73%)

Above 25%42,975 (55%)

CO₂ avoided

86.5 kt/yr

Fuel avoided

24.4 million litres/yr

Energy unlocked

38.3 GWh/yr

Demand that is suppressed today

People served

299k

What hardware costs right now

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

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 Anaocha

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	26,744	9,030	₦13.9bn	₦13.8bn	25%	4.4 yr
B	17,307	7,940	₦14.9bn	₦14.6bn	25%	4.1 yr
E	16,500	5,930	₦10.5bn	₦10.3bn	25%	4.4 yr
D	15,857	6,021	₦8.47bn	₦8.42bn	25%	4.4 yr
A	1,282	417	₦520m	₦520m	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	74,460	27,066	₦34.1bn	₦33.8bn	25%	4.4 yr
Commercial General	1,764	1,189	₦6.58bn	₦6.57bn	51%	2.1 yr
Commercial Retail	687	417	₦129m	₦129m	47%	2.1 yr
Anchor	340	285	₦6.15bn	₦6bn	55%	1.9 yr
Industrial	242	207	₦974m	₦974m	65%	1.6 yr
Worship	170	152	₦222m	₦222m	59%	1.9 yr
Filling Station	18	15	₦17.3m	₦17.3m	61%	1.6 yr
Hospitality	8	6	₦20.5m	₦20.5m	47%	2.1 yr
Productive Use	1	1	₦241k	₦241k	55%	1.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	26,083	9,784	₦17.2bn	₦17.1bn	25%	4.4 yr
50 100m2	17,998	6,619	₦3.22bn	₦3.13bn	25%	4.6 yr
Under 30m2	14,383	5,372	₦579m	₦578m	15%	6.9 yr
30 50m2	11,118	4,095	₦804m	₦782m	19%	5.6 yr
250 1000m2	8,018	3,402	₦21.4bn	₦21.1bn	25%	4.1 yr
Over 1000m2	90	66	₦5.06bn	₦4.99bn	63%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	74,943	28,308	₦47bn	₦46.5bn	25%	4.4 yr
Unclassified	2,747	1,030	₦1.28bn	₦1.17bn	25%	4.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	27,797	10,376	₦4.5bn	₦4.41bn	23%	4.6 yr
Residential	22,295	8,871	₦27.8bn	₦27.5bn	25%	4.4 yr
Shed	14,441	5,491	₦534m	₦534m	15%	6.9 yr
Residential Formal	6,168	1,370	₦800m	₦784m	25%	4.4 yr
Residential Informal	2,720	737	₦409m	₦409m	25%	4.4 yr
Commercial	860	568	₦3.7bn	₦3.69bn	51%	2.1 yr
Apartment	689	130	₦80.9m	₦80.9m	25%	4.4 yr
Kiosk Shop	688	418	₦129m	₦129m	47%	2.1 yr
Commercial Corridor	435	255	₦1.24bn	₦1.24bn	53%	2.1 yr
Institutional	429	362	₦4.29bn	₦4.29bn	55%	1.9 yr
Duplex	256	60	₦35.1m	₦35.1m	25%	4.4 yr
Industrial Site	191	158	₦761m	₦761m	67%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	77,690	29,338	₦48.2bn	₦47.7bn

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	75,791	28,005	₦36.1bn	₦35.8bn	25%	4.4 yr
SME High	1,317	841	₦4.97bn	₦4.96bn	51%	2.1 yr
Enterprise	582	492	₦7.12bn	₦6.97bn	59%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	40,077	16,120	₦39.6bn	₦39.2bn
0.0	14,524	5,522	₦545m	₦545m
2.0	12,548	4,716	₦1.76bn	₦1.76bn
4.0	8,493	2,027	₦4.7bn	₦4.62bn
1.0	1,634	797	₦161m	₦161m
5.0	334	120	₦1bn	₦1bn
6.0	80	36	₦418m	₦418m