Anambra State

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

Dunukofia has 44,762 buildings with a viable rooftop and 1.03 GWp of roof capacity. 44% run a generator, and together they spend ₦27.7bn a year on energy.

Viable buildings

44,762

Usable roof area

4.59 km²

1.03 GWp roof capacity

Energy spend

₦27.7bn/yr

24.4 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Dunukofia

Approach B

Cash saved

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

Current energy spend₦27.7bn/yr

Year-one cash saved₦27.7bn

Lifetime cash saved₦1.47tn

NPV₦222bn

Median IRR25%

Median payback4.4 yr

Unlocked energy24 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity92.6 MWp

Capex₦93.8bn

Year-one energy value₦71.9bn

Lifetime energy value₦3.41tn

NPV₦561bn

Median IRR83%

Median payback1.4 yr

Three ways to size Dunukofia'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: 92.6 MWp
Capital cost: ₦93.8bn
Year 1 savings: ₦71.9bn/yr
NPV: ₦561bn
Median IRR: 83%
Median payback: 1.4 yr

The odds a rooftop in Dunukofia pays back quickly

Of the 44,594 buildings in Dunukofia with a modelled payback, 76.2% pay back inside five years and 42.3% inside three.

Create a free account

How much of Dunukofia's demand actually gets met

Buildings in Dunukofia consume 44.1 GWh/yr but want 68 GWh/yr. The 35% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Dunukofia

Loading band economics…

How many rooftops in Dunukofia 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 44,594 buildings with a modelled result out of 44,762 in Dunukofia. 40,303 clear a positive NPV.

Payback

Under 3 years18,868 (42%)

Under 5 years33,976 (76%)

Under 7 years40,261 (90%)

Under 10 years42,809 (96%)

Return (IRR)

Above 10%42,441 (95%)

Above 15%40,303 (90%)

Above 20%35,866 (80%)

Above 25%27,012 (60%)

CO₂ avoided

51.9 kt/yr

Fuel avoided

14 million litres/yr

Energy unlocked

24 GWh/yr

Demand that is suppressed today

People served

148k

What hardware costs right now

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

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 Dunukofia

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
B	21,464	10,031	₦13.3bn	₦13.3bn	25%	4.4 yr
C	15,531	7,454	₦11.9bn	₦11.8bn	25%	4.4 yr
A	7,064	1,628	₦1.39bn	₦1.39bn	25%	4.4 yr
E	669	476	₦1.03bn	₦1.03bn	73%	1.4 yr
D	34	20	₦139m	₦139m	63%	1.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	43,338	18,656	₦21.1bn	₦21bn	25%	4.4 yr
Commercial General	632	396	₦2.2bn	₦2.2bn	47%	2.4 yr
Anchor	318	235	₦3.37bn	₦3.36bn	53%	2.1 yr
Worship	185	146	₦341m	₦341m	53%	2.1 yr
Industrial	147	123	₦593m	₦591m	59%	1.9 yr
Commercial Retail	124	35	₦18.3m	₦18.3m	33%	3.4 yr
Filling Station	10	10	₦17.6m	₦17.6m	55%	1.9 yr
Hospitality	7	7	₦131m	₦131m	45%	2.4 yr
Automotive	1	1	₦1.08m	₦1.08m	57%	1.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	17,080	7,414	₦10bn	₦10bn	25%	4.4 yr
50 100m2	9,910	4,223	₦1.57bn	₦1.57bn	25%	4.4 yr
Under 30m2	7,580	3,249	₦329m	₦323m	19%	5.9 yr
30 50m2	5,580	2,408	₦435m	₦435m	21%	4.9 yr
250 1000m2	4,533	2,258	₦12.1bn	₦12.1bn	31%	3.4 yr
Over 1000m2	79	57	₦3.29bn	₦3.28bn	53%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	38,341	15,909	₦21.2bn	₦21.2bn	25%	4.4 yr
Dense Urban	3,888	2,317	₦3.18bn	₦3.18bn	53%	2.1 yr
Unclassified	1,679	806	₦2.53bn	₦2.53bn	25%	4.1 yr
Urban	854	577	₦808m	₦808m	57%	1.9 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	12,153	6,767	₦2.29bn	₦2.29bn	49%	2.1 yr
Residential	11,120	6,180	₦16.8bn	₦16.8bn	51%	2.1 yr
Residential Formal	8,433	2,090	₦1.05bn	₦1.05bn	25%	4.4 yr
Shed	5,534	2,634	₦263m	₦263m	21%	5.4 yr
Residential Informal	3,923	361	₦306m	₦306m	25%	4.4 yr
Apartment	1,914	505	₦246m	₦246m	25%	4.4 yr
Institutional	327	256	₦2.77bn	₦2.77bn	49%	2.1 yr
Duplex	194	76	₦30.8m	₦30.8m	25%	4.4 yr
Commercial	152	120	₦814m	₦814m	55%	1.9 yr
Commercial Corridor	128	7	₦115m	₦115m	33%	3.1 yr
Kiosk Shop	124	35	₦18.3m	₦18.3m	33%	3.4 yr
Industrial Site	107	93	₦512m	₦510m	59%	1.9 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	44,762	19,609	₦27.7bn	₦27.7bn

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	44,022	19,125	₦22.7bn	₦22.7bn	25%	4.4 yr
Enterprise	444	343	₦3.93bn	₦3.92bn	53%	1.9 yr
SME High	296	141	₦1.06bn	₦1.06bn	35%	3.1 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	20,180	11,161	₦22.9bn	₦22.9bn
4.0	13,051	2,854	₦3.4bn	₦3.39bn
0.0	5,597	2,675	₦279m	₦279m
2.0	5,215	2,572	₦861m	₦858m
1.0	613	340	₦55.1m	₦55.1m
5.0	100	6	₦113m	₦113m
6.0	6	1	₦146m	₦146m