Abia State

Rooftop solar in Ikwuano, Abia: what the roofs are worth

Ikwuano has 34,670 buildings with a viable rooftop and 823 MWp of roof capacity. 37% run a generator, and together they spend ₦35.2bn a year on energy.

Viable buildings

34,670

Usable roof area

3.66 km²

823 MWp roof capacity

Energy spend

₦35.2bn/yr

31.8 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Ikwuano

Approach B

Cash saved

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

Current energy spend₦35.2bn/yr

Year-one cash saved₦35bn

Lifetime cash saved₦1.83tn

NPV₦283bn

Median IRR25%

Median payback4.4 yr

Unlocked energy24.1 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity119 MWp

Capex₦122bn

Year-one energy value₦104bn

Lifetime energy value₦4.91tn

NPV₦822bn

Median IRR97%

Median payback1.1 yr

Three ways to size Ikwuano'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: 119 MWp
Capital cost: ₦122bn
Year 1 savings: ₦104bn/yr
NPV: ₦822bn
Median IRR: 97%
Median payback: 1.1 yr

The odds a rooftop in Ikwuano pays back quickly

Of the 34,518 buildings in Ikwuano with a modelled payback, 73.2% pay back inside five years and 37.7% inside three.

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How much of Ikwuano's demand actually gets met

Buildings in Ikwuano consume 47.3 GWh/yr but want 71.4 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 Ikwuano

Loading band economics…

How many rooftops in Ikwuano 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 34,518 buildings with a modelled result out of 34,670 in Ikwuano. 29,737 clear a positive NPV.

Payback

Under 3 years13,000 (38%)

Under 5 years25,251 (73%)

Under 7 years29,714 (86%)

Under 10 years32,016 (93%)

Return (IRR)

Above 10%31,517 (91%)

Above 15%29,737 (86%)

Above 20%26,735 (77%)

Above 25%14,655 (42%)

CO₂ avoided

62.3 kt/yr

Fuel avoided

19.3 million litres/yr

Energy unlocked

24.1 GWh/yr

Demand that is suppressed today

People served

213k

What hardware costs right now

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

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 Ikwuano

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	10,353	4,070	₦10.5bn	₦10.4bn	25%	4.4 yr
C	8,753	3,883	₦10bn	₦9.99bn	25%	4.4 yr
E	8,070	3,803	₦11.7bn	₦11.6bn	25%	4.4 yr
B	6,629	1,202	₦2.89bn	₦2.89bn	25%	4.4 yr
A	865	6	₦81m	₦81m	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	33,475	11,990	₦29bn	₦28.9bn	25%	4.4 yr
Anchor	444	369	₦3.7bn	₦3.61bn	69%	1.6 yr
Commercial General	333	260	₦1.31bn	₦1.31bn	57%	1.9 yr
Worship	287	255	₦683m	₦683m	61%	1.9 yr
Industrial	108	75	₦429m	₦428m	59%	1.6 yr
Commercial Retail	13	12	₦4.15m	₦4.15m	65%	1.6 yr
Filling Station	7	3	₦5.19m	₦5.19m	33%	3.4 yr
Hospitality	3	0	₦8.61m	₦8.61m	33%	3.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	12,702	4,734	₦14bn	₦13.9bn	25%	4.4 yr
50 100m2	7,909	2,929	₦2.4bn	₦2.4bn	25%	4.6 yr
Under 30m2	5,755	1,982	₦298m	₦294m	15%	6.9 yr
30 50m2	4,450	1,628	₦470m	₦470m	21%	5.4 yr
250 1000m2	3,768	1,655	₦15.5bn	₦15.3bn	25%	4.4 yr
Over 1000m2	86	36	₦2.57bn	₦2.54bn	31%	3.4 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	16,311	7,057	₦19.5bn	₦19.3bn	25%	4.4 yr
Urban Centre	9,759	2,397	₦5.69bn	₦5.69bn	25%	4.4 yr
Dense Urban	4,929	1,746	₦4.35bn	₦4.35bn	25%	4.4 yr
Unclassified	2,953	1,182	₦4.68bn	₦4.65bn	25%	4.4 yr
Rural	718	582	₦989m	₦989m	71%	1.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	11,131	4,796	₦24.7bn	₦24.6bn	25%	4.4 yr
Residential Small	11,124	4,764	₦3.55bn	₦3.55bn	25%	4.4 yr
Shed	6,022	2,261	₦296m	₦296m	17%	6.6 yr
Residential Formal	2,761	73	₦231m	₦231m	21%	5.4 yr
Residential Informal	1,964	61	₦177m	₦177m	25%	4.6 yr
Institutional	400	326	₦2.73bn	₦2.71bn	57%	1.9 yr
Apartment	374	23	₦53.3m	₦53.3m	25%	4.4 yr
Educational Facility	167	138	₦761m	₦761m	79%	1.4 yr
School	124	103	₦228m	₦228m	79%	1.4 yr
Worship Center	102	90	₦118m	₦118m	63%	1.6 yr
Place Of Worship	96	84	₦93.1m	₦93.1m	63%	1.6 yr
Industrial Site	71	46	₦277m	₦276m	63%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	34,670	12,964	₦35.2bn	₦35bn

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	34,101	12,507	₦31bn	₦30.8bn	25%	4.4 yr
Enterprise	541	436	₦4.05bn	₦3.96bn	65%	1.6 yr
SME High	28	21	₦160m	₦160m	67%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	17,615	7,585	₦30.9bn	₦30.7bn
2.0	6,452	2,550	₦2.78bn	₦2.78bn
0.0	6,047	2,270	₦301m	₦301m
4.0	3,719	166	₦984m	₦984m
1.0	835	392	₦180m	₦179m
5.0	2	1	₦20.3m	₦20.3m