Ebonyi State

Rooftop solar in Ohaozara, Ebonyi: what the roofs are worth

Ohaozara has 36,925 buildings with a viable rooftop and 792 MWp of roof capacity. 48% run a generator, and together they spend ₦25.6bn a year on energy.

Viable buildings

36,925

Usable roof area

3.53 km²

792 MWp roof capacity

Energy spend

₦25.6bn/yr

23.1 GWh/yr burned on generators

Median payback

4.1 yr

Median IRR 25% (cash saved)

The savings bracket for Ohaozara

Approach B

Cash saved

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

Current energy spend₦25.6bn/yr

Year-one cash saved₦25.5bn

Lifetime cash saved₦1.32tn

NPV₦207bn

Median IRR25%

Median payback4.1 yr

Unlocked energy22.1 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity93.9 MWp

Capex₦97.8bn

Year-one energy value₦86bn

Lifetime energy value₦4.08tn

NPV₦687bn

Median IRR99%

Median payback1.1 yr

Three ways to size Ohaozara'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: 93.9 MWp
Capital cost: ₦97.8bn
Year 1 savings: ₦86bn/yr
NPV: ₦687bn
Median IRR: 99%
Median payback: 1.1 yr

The odds a rooftop in Ohaozara pays back quickly

Of the 36,816 buildings in Ohaozara with a modelled payback, 76.5% pay back inside five years and 46.4% inside three.

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How much of Ohaozara's demand actually gets met

Buildings in Ohaozara consume 36.3 GWh/yr but want 58.4 GWh/yr. The 38% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Ohaozara

Loading band economics…

How many rooftops in Ohaozara 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 36,816 buildings with a modelled result out of 36,925 in Ohaozara. 31,745 clear a positive NPV.

Payback

Under 3 years17,101 (46%)

Under 5 years28,151 (76%)

Under 7 years31,723 (86%)

Under 10 years33,889 (92%)

Return (IRR)

Above 10%33,372 (90%)

Above 15%31,745 (86%)

Above 20%29,201 (79%)

Above 25%25,866 (70%)

CO₂ avoided

47.5 kt/yr

Fuel avoided

13.7 million litres/yr

Energy unlocked

22.1 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 Ohaozara.

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 Ohaozara

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	16,234	6,797	₦10bn	₦9.97bn	25%	4.4 yr
D	10,394	5,263	₦7.83bn	₦7.8bn	55%	1.9 yr
E	6,898	3,639	₦5.34bn	₦5.34bn	61%	1.9 yr
B	3,286	2,042	₦2.41bn	₦2.41bn	33%	3.1 yr
A	113	5	₦15.8m	₦15.8m	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	35,678	16,593	₦20.7bn	₦20.7bn	25%	4.1 yr
Commercial General	407	380	₦1.34bn	₦1.34bn	57%	1.9 yr
Anchor	378	354	₦2.72bn	₦2.66bn	61%	1.6 yr
Worship	287	258	₦342m	₦342m	59%	1.9 yr
Industrial	129	118	₦481m	₦480m	71%	1.4 yr
Commercial Retail	33	32	₦5.87m	₦5.87m	35%	3.1 yr
Filling Station	11	9	₦10.4m	₦10.4m	41%	2.6 yr
Hospitality	2	2	₦26.6m	₦26.6m	47%	1.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	12,595	6,186	₦11.1bn	₦11.1bn	27%	4.1 yr
50 100m2	10,870	5,056	₦2.68bn	₦2.68bn	25%	4.4 yr
30 50m2	5,162	2,334	₦478m	₦478m	23%	4.6 yr
Under 30m2	5,096	2,376	₦232m	₦232m	17%	6.1 yr
250 1000m2	3,162	1,766	₦9.99bn	₦9.96bn	49%	2.1 yr
Over 1000m2	40	28	₦1.09bn	₦1.04bn	59%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	17,604	9,574	₦16.4bn	₦16.3bn	53%	2.1 yr
Dense Urban	13,873	5,928	₦5.52bn	₦5.5bn	25%	4.4 yr
Unclassified	4,507	1,587	₦2.85bn	₦2.85bn	25%	4.4 yr
Rural	941	657	₦826m	₦826m	73%	1.4 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	15,872	7,581	₦3.73bn	₦3.73bn	25%	4.4 yr
Residential	11,799	5,652	₦16.5bn	₦16.5bn	27%	4.1 yr
Shed	6,423	2,550	₦214m	₦214m	15%	6.6 yr
Residential Formal	823	212	₦88.5m	₦88.5m	25%	4.4 yr
Residential Informal	722	577	₦133m	₦133m	27%	3.9 yr
Institutional	429	395	₦1.75bn	₦1.72bn	57%	1.9 yr
Educational Facility	121	117	₦422m	₦422m	81%	1.4 yr
Industrial Site	120	110	₦470m	₦470m	71%	1.4 yr
Worship Center	108	98	₦88.3m	₦88.3m	63%	1.6 yr
Place Of Worship	84	74	₦44m	₦44m	63%	1.6 yr
School	74	70	₦125m	₦125m	81%	1.4 yr
Healthcare Facility	63	57	₦1.21bn	₦1.19bn	53%	2.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	36,925	17,746	₦25.6bn	₦25.5bn

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	36,356	17,216	₦22.2bn	₦22.2bn	25%	4.1 yr
Enterprise	507	472	₦3.2bn	₦3.14bn	65%	1.6 yr
SME High	62	58	₦175m	₦175m	37%	2.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
2.0	14,477	7,069	₦4.55bn	₦4.55bn
3.0	12,908	6,746	₦20.1bn	₦20bn
0.0	6,456	2,573	₦222m	₦222m
1.0	2,343	1,099	₦386m	₦386m
4.0	724	243	₦238m	₦238m
5.0	16	15	₦85.4m	₦85.4m
6.0	1	1	₦10.5m	₦10.5m