Akwa Ibom State

Rooftop solar in Mkpat Enin, Akwa Ibom: what the roofs are worth

Mkpat Enin has 26,785 buildings with a viable rooftop and 664 MWp of roof capacity. 46% run a generator, and together they spend ₦41.8bn a year on energy.

Viable buildings

26,785

Usable roof area

2.95 km²

664 MWp roof capacity

Energy spend

₦41.8bn/yr

37.7 GWh/yr burned on generators

Median payback

4.6 yr

Median IRR 23% (cash saved)

The savings bracket for Mkpat Enin

Approach B

Cash saved

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

Current energy spend₦41.8bn/yr

Year-one cash saved₦40.3bn

Lifetime cash saved₦2.05tn

NPV₦322bn

Median IRR23%

Median payback4.6 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 capacity129 MWp

Capex₦134bn

Year-one energy value₦116bn

Lifetime energy value₦5.48tn

NPV₦920bn

Median IRR93%

Median payback1.1 yr

Three ways to size Mkpat Enin'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: 129 MWp
Capital cost: ₦134bn
Year 1 savings: ₦116bn/yr
NPV: ₦920bn
Median IRR: 93%
Median payback: 1.1 yr

The odds a rooftop in Mkpat Enin pays back quickly

Of the 26,668 buildings in Mkpat Enin with a modelled payback, 80.1% pay back inside five years and 46.5% inside three.

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How much of Mkpat Enin's demand actually gets met

Buildings in Mkpat Enin consume 50 GWh/yr but want 74.1 GWh/yr. The 33% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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Electricity billing bands in Mkpat Enin

Loading band economics…

How many rooftops in Mkpat Enin 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 26,668 buildings with a modelled result out of 26,785 in Mkpat Enin. 23,249 clear a positive NPV.

Payback

Under 3 years12,396 (46%)

Under 5 years21,352 (80%)

Under 7 years23,226 (87%)

Under 10 years24,370 (91%)

Return (IRR)

Above 10%24,025 (90%)

Above 15%23,249 (87%)

Above 20%22,083 (82%)

Above 25%12,464 (47%)

CO₂ avoided

70.2 kt/yr

Fuel avoided

23.4 million litres/yr

Energy unlocked

24.1 GWh/yr

Demand that is suppressed today

People served

273k

What hardware costs right now

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

Solar panels

₦250

₦/W

Inverters

₦127,419

₦/kVA

Batteries

₦177,500

₦/kWh

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Building mix in Mkpat Enin

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
E	16,590	8,539	₦29.5bn	₦28.3bn	57%	1.9 yr
D	7,627	3,450	₦10.7bn	₦10.4bn	23%	4.6 yr
C	2,113	399	₦1.42bn	₦1.42bn	23%	4.6 yr
B	454	23	₦183m	₦183m	23%	4.6 yr
A	1	0	₦7.54k	₦7.54k	17%	6.1 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	26,027	11,710	₦37.4bn	₦36.1bn	23%	4.6 yr
Commercial General	262	238	₦1.51bn	₦1.51bn	57%	1.9 yr
Worship	258	240	₦663m	₦663m	59%	1.9 yr
Anchor	173	165	₦2.12bn	₦1.92bn	77%	1.4 yr
Industrial	44	40	₦120m	₦119m	67%	1.6 yr
Commercial Retail	20	17	₦8.3m	₦8.3m	57%	1.6 yr
Hospitality	1	1	₦3.64m	₦3.64m	45%	2.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	11,150	5,232	₦18.2bn	₦17.7bn	23%	4.6 yr
50 100m2	6,422	2,710	₦2.56bn	₦2.45bn	23%	4.6 yr
Under 30m2	3,239	1,455	₦210m	₦208m	15%	6.6 yr
30 50m2	3,077	1,356	₦412m	₦411m	21%	4.9 yr
250 1000m2	2,867	1,635	₦19.3bn	₦18.5bn	63%	1.6 yr
Over 1000m2	30	23	₦1.1bn	₦1.1bn	59%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	13,780	7,377	₦25.5bn	₦24.3bn	59%	1.9 yr
Unclassified	6,696	1,813	₦7.5bn	₦7.21bn	23%	4.6 yr
Dense Urban	5,707	3,103	₦8.5bn	₦8.42bn	51%	2.1 yr
Rural	602	118	₦314m	₦314m	23%	4.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	10,833	5,298	₦32.9bn	₦31.7bn	25%	4.6 yr
Residential Small	9,935	4,465	₦4.21bn	₦4.08bn	23%	4.6 yr
Shed	4,581	1,947	₦235m	₦235m	11%	9.1 yr
Residential Formal	669	0	₦24.7m	₦24.7m	21%	5.1 yr
Institutional	217	198	₦1.76bn	₦1.76bn	57%	1.9 yr
Worship Center	96	89	₦118m	₦118m	63%	1.6 yr
Commercial Corridor	91	84	₦452m	₦452m	65%	1.6 yr
Place Of Worship	74	70	₦74.2m	₦74.2m	63%	1.6 yr
Educational Facility	72	69	₦531m	₦531m	81%	1.4 yr
School	47	46	₦198m	₦198m	79%	1.4 yr
Industrial Site	42	38	₦115m	₦114m	69%	1.6 yr
Market	33	30	₦66.4m	₦66.4m	63%	1.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	26,785	12,411	₦41.8bn	₦40.3bn

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	26,478	12,123	₦39.1bn	₦37.8bn	23%	4.6 yr
Enterprise	216	204	₦2.24bn	₦2.03bn	73%	1.4 yr
SME High	91	84	₦452m	₦452m	65%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	11,438	6,171	₦35.6bn	₦34.4bn
2.0	8,870	3,895	₦5.23bn	₦5.08bn
0.0	4,584	1,950	₦236m	₦236m
1.0	1,270	354	₦330m	₦219m
4.0	621	39	₦343m	₦343m
5.0	2	2	₦49.1m	₦49.1m