Anambra State

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

Anambra West has 19,439 buildings with a viable rooftop and 290 MWp of roof capacity. 38% run a generator, and together they spend ₦45.5bn a year on energy.

Viable buildings

19,439

Usable roof area

1.3 km²

290 MWp roof capacity

Energy spend

₦45.5bn/yr

40.2 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Anambra West

Approach B

Cash saved

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

Current energy spend₦45.5bn/yr

Year-one cash saved₦39.9bn

Lifetime cash saved₦1.97tn

NPV₦324bn

Median IRR25%

Median payback4.4 yr

Unlocked energy19.1 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity89.3 MWp

Capex₦93.8bn

Year-one energy value₦92.9bn

Lifetime energy value₦4.3tn

NPV₦741bn

Median IRR99%

Median payback1.1 yr

Three ways to size Anambra West'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: 89.3 MWp
Capital cost: ₦93.8bn
Year 1 savings: ₦92.9bn/yr
NPV: ₦741bn
Median IRR: 99%
Median payback: 1.1 yr

The odds a rooftop in Anambra West pays back quickly

Of the 19,291 buildings in Anambra West with a modelled payback, 61.9% pay back inside five years and 38.8% inside three.

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How much of Anambra West's demand actually gets met

Buildings in Anambra West consume 51.6 GWh/yr but want 70.7 GWh/yr. The 27% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Anambra West

Loading band economics…

How many rooftops in Anambra West 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 19,291 buildings with a modelled result out of 19,439 in Anambra West. 12,325 clear a positive NPV.

Payback

Under 3 years7,476 (39%)

Under 5 years11,936 (62%)

Under 7 years12,322 (64%)

Under 10 years13,483 (70%)

Return (IRR)

Above 10%13,115 (67%)

Above 15%12,325 (63%)

Above 20%12,056 (62%)

Above 25%11,525 (59%)

CO₂ avoided

67.8 kt/yr

Fuel avoided

23.7 million litres/yr

Energy unlocked

19.1 GWh/yr

Demand that is suppressed today

People served

313k

What hardware costs right now

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

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 West

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
E	10,470	4,590	₦28.2bn	₦24.3bn	25%	4.1 yr
D	7,061	2,284	₦13.7bn	₦13bn	25%	4.4 yr
C	1,732	588	₦3.48bn	₦2.63bn	25%	4.4 yr
B	176	0	₦26.9m	₦25.7m	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	18,983	7,125	₦42.8bn	₦37.5bn	25%	4.4 yr
Anchor	189	156	₦1.85bn	₦1.61bn	79%	1.4 yr
Commercial General	138	100	₦622m	₦622m	57%	1.9 yr
Worship	68	60	₦53.2m	₦53.2m	61%	1.6 yr
Industrial	61	21	₦117m	₦117m	35%	3.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	5,452	3,248	₦25bn	₦22.8bn	73%	1.4 yr
Under 30m2	5,108	1,342	₦383m	₦306m	7%	15.6 yr
50 100m2	4,123	1,591	₦4.45bn	₦3.97bn	27%	4.1 yr
30 50m2	4,065	865	₦764m	₦692m	9%	12.9 yr
250 1000m2	678	408	₦13.5bn	₦10.9bn	73%	1.4 yr
Over 1000m2	13	8	₦1.39bn	₦1.21bn	65%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	7,881	1,081	₦9.93bn	₦7.85bn	7%	13.9 yr
Urban	7,094	3,682	₦18.6bn	₦17.9bn	61%	1.6 yr
Rural	2,510	1,098	₦7.47bn	₦6.37bn	25%	4.1 yr
Dense Urban	1,468	1,131	₦8.34bn	₦6.66bn	59%	1.9 yr
Urban Centre	486	470	₦1.08bn	₦1.08bn	75%	1.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	7,270	1,347	₦155m	₦155m	7%	15.1 yr
Residential Small	6,733	2,882	₦8bn	₦7.41bn	27%	4.1 yr
Residential	4,065	2,386	₦33.3bn	₦28.6bn	73%	1.4 yr
Residential Formal	862	489	₦1.35bn	₦1.35bn	53%	2.1 yr
Institutional	158	118	₦1.18bn	₦1.01bn	57%	1.9 yr
Educational Facility	82	68	₦549m	₦549m	83%	1.1 yr
Industrial Site	60	21	₦117m	₦117m	35%	3.1 yr
School	50	44	₦157m	₦157m	81%	1.4 yr
Healthcare Facility	29	23	₦405m	₦355m	53%	2.1 yr
Worship Center	26	23	₦11.5m	₦11.5m	63%	1.6 yr
Duplex	24	9	₦15.1m	₦15.1m	25%	4.1 yr
Clinic	21	15	₦79.5m	₦78.9m	53%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	19,437	7,462	₦45.5bn	₦39.9bn
Farmland	2	0	₦3.73k	₦3.73k

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	19,189	7,285	₦43.5bn	₦38.2bn	25%	4.4 yr
Enterprise	250	177	₦1.97bn	₦1.73bn	73%	1.4 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	7,283	1,350	₦155m	₦155m
3.0	5,059	3,044	₦33.8bn	₦29.8bn
2.0	4,191	2,232	₦8.34bn	₦7.21bn
1.0	2,144	399	₦1.6bn	₦1.16bn
4.0	762	437	₦1.59bn	₦1.58bn