Rivers State

Rooftop solar in Emuoha, Rivers: what the roofs are worth

Emuoha has 59,611 buildings with a viable rooftop and 1.19 GWp of roof capacity. 43% run a generator, and together they spend ₦65.2bn a year on energy.

Viable buildings

59,611

Usable roof area

5.32 km²

1.19 GWp roof capacity

Energy spend

₦65.2bn/yr

59 GWh/yr burned on generators

Median payback

4.4 yr

Median IRR 25% (cash saved)

The savings bracket for Emuoha

Approach B

Cash saved

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

Current energy spend₦65.2bn/yr

Year-one cash saved₦62.2bn

Lifetime cash saved₦3.22tn

NPV₦484bn

Median IRR25%

Median payback4.4 yr

Unlocked energy36.1 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity178 MWp

Capex₦178bn

Year-one energy value₦132bn

Lifetime energy value₦6.23tn

NPV₦1.02tn

Median IRR79%

Median payback1.4 yr

Three ways to size Emuoha'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: 178 MWp
Capital cost: ₦178bn
Year 1 savings: ₦132bn/yr
NPV: ₦1.02tn
Median IRR: 79%
Median payback: 1.4 yr

The odds a rooftop in Emuoha pays back quickly

Of the 59,331 buildings in Emuoha with a modelled payback, 70.8% pay back inside five years and 41.0% inside three.

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How much of Emuoha's demand actually gets met

Buildings in Emuoha consume 100 GWh/yr but want 136 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 Emuoha

Loading band economics…

How many rooftops in Emuoha 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 59,331 buildings with a modelled result out of 59,611 in Emuoha. 51,803 clear a positive NPV.

Payback

Under 3 years24,342 (41%)

Under 5 years42,007 (71%)

Under 7 years51,732 (87%)

Under 10 years55,088 (93%)

Return (IRR)

Above 10%54,553 (92%)

Above 15%51,803 (87%)

Above 20%44,762 (75%)

Above 25%27,017 (45%)

CO₂ avoided

108 kt/yr

Fuel avoided

31.8 million litres/yr

Energy unlocked

36.1 GWh/yr

Demand that is suppressed today

People served

265k

What hardware costs right now

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

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 Emuoha

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	33,082	14,357	₦29.7bn	₦29.3bn	25%	4.4 yr
B	9,309	5,614	₦12.2bn	₦11.8bn	47%	2.4 yr
D	8,263	3,019	₦11.4bn	₦11bn	25%	4.6 yr
E	6,927	1,887	₦9.79bn	₦8.02bn	23%	4.9 yr
A	2,030	1,020	₦2.12bn	₦2.1bn	25%	4.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	58,551	25,222	₦49.1bn	₦46.4bn	25%	4.4 yr
Commercial General	502	297	₦2.61bn	₦2.61bn	43%	2.6 yr
Anchor	277	229	₦13.3bn	₦13bn	61%	1.9 yr
Commercial Retail	182	79	₦24.2m	₦24.2m	33%	3.4 yr
Worship	59	45	₦74.1m	₦74.1m	47%	2.4 yr
Industrial	28	17	₦96.2m	₦94.2m	53%	1.9 yr
Hospitality	5	4	₦18.8m	₦18.8m	37%	2.9 yr
Filling Station	3	2	₦2.82m	₦2.82m	55%	1.9 yr
Productive Use	3	1	₦2.17m	₦2.17m	33%	3.1 yr
Mall Retail	1	1	₦208k	₦208k	35%	3.1 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	18,333	8,387	₦21.8bn	₦21.1bn	25%	4.4 yr
50 100m2	14,357	6,011	₦3.76bn	₦3.75bn	25%	4.6 yr
Under 30m2	13,531	5,491	₦613m	₦611m	19%	5.6 yr
30 50m2	8,816	3,596	₦787m	₦785m	23%	4.9 yr
250 1000m2	4,417	2,297	₦21.2bn	₦19.7bn	35%	3.1 yr
Over 1000m2	157	115	₦17bn	₦16.3bn	57%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Dense Urban	40,216	17,786	₦24.8bn	₦24.4bn	25%	4.4 yr
Urban	13,139	5,945	₦15bn	₦13.7bn	25%	4.4 yr
Unclassified	3,321	635	₦11.8bn	₦11.4bn	23%	4.6 yr
Rural	2,698	1,408	₦13.2bn	₦12.1bn	55%	1.9 yr
Urban Centre	237	123	₦504m	₦504m	51%	1.9 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	15,291	7,723	₦5.45bn	₦5.44bn	31%	3.4 yr
Shed	15,066	6,546	₦751m	₦751m	21%	5.4 yr
Residential	12,858	6,865	₦39.6bn	₦37bn	53%	2.1 yr
Residential Informal	9,025	2,741	₦2.63bn	₦2.63bn	25%	4.6 yr
Residential Formal	5,421	1,143	₦554m	₦554m	23%	4.6 yr
Apartment	740	156	₦69.1m	₦69.1m	23%	4.6 yr
Commercial Corridor	196	60	₦399m	₦399m	33%	3.1 yr
Kiosk Shop	183	79	₦24m	₦24m	33%	3.4 yr
Institutional	174	145	₦11.4bn	₦11.3bn	47%	2.1 yr
Duplex	146	46	₦19.1m	₦19.1m	25%	4.6 yr
Commercial	103	95	₦858m	₦858m	53%	1.9 yr
Educational Facility	93	81	₦1.48bn	₦1.48bn	67%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	58,879	25,489	₦63.4bn	₦60.5bn
Industrial	636	327	₦1.58bn	₦1.57bn
Commercial	83	81	₦189m	₦189m
Orchard	13	0	₦55k	₦55k

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	59,022	25,501	₦50.6bn	₦48bn	25%	4.4 yr
SME High	303	160	₦1.26bn	₦1.26bn	41%	2.6 yr
Enterprise	286	236	₦13.3bn	₦13bn	59%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	24,587	12,893	₦54.8bn	₦52bn
0.0	15,003	6,548	₦756m	₦756m
4.0	10,240	2,664	₦4.74bn	₦4.74bn
2.0	8,088	3,293	₦4.2bn	₦4.03bn
1.0	1,613	490	₦355m	₦354m
5.0	72	9	₦315m	₦315m
6.0	8	0	₦73.1m	₦73.1m