Abia State

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

Ugwunagbo has 25,109 buildings with a viable rooftop and 520 MWp of roof capacity. 30% run a generator, and together they spend ₦18bn a year on energy.

Viable buildings

25,109

Usable roof area

2.32 km²

520 MWp roof capacity

Energy spend

₦18bn/yr

16.4 GWh/yr burned on generators

Median payback

4.6 yr

Median IRR 23% (cash saved)

The savings bracket for Ugwunagbo

Approach B

Cash saved

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

Current energy spend₦18bn/yr

Year-one cash saved₦17.6bn

Lifetime cash saved₦935bn

NPV₦138bn

Median IRR23%

Median payback4.6 yr

Unlocked energy15.6 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity88.3 MWp

Capex₦89.7bn

Year-one energy value₦72.5bn

Lifetime energy value₦3.44tn

NPV₦571bn

Median IRR91%

Median payback1.1 yr

Three ways to size Ugwunagbo'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: 88.3 MWp
Capital cost: ₦89.7bn
Year 1 savings: ₦72.5bn/yr
NPV: ₦571bn
Median IRR: 91%
Median payback: 1.1 yr

The odds a rooftop in Ugwunagbo pays back quickly

Of the 25,080 buildings in Ugwunagbo with a modelled payback, 71.2% pay back inside five years and 29.1% inside three.

Create a free account

How much of Ugwunagbo's demand actually gets met

Buildings in Ugwunagbo consume 29.8 GWh/yr but want 45.4 GWh/yr. The 34% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Ugwunagbo

Loading band economics…

How many rooftops in Ugwunagbo 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 25,080 buildings with a modelled result out of 25,109 in Ugwunagbo. 20,973 clear a positive NPV.

Payback

Under 3 years7,298 (29%)

Under 5 years17,862 (71%)

Under 7 years20,949 (84%)

Under 10 years22,194 (88%)

Return (IRR)

Above 10%21,831 (87%)

Above 15%20,973 (84%)

Above 20%18,930 (75%)

Above 25%7,841 (31%)

CO₂ avoided

32.8 kt/yr

Fuel avoided

8.54 million litres/yr

Energy unlocked

15.6 GWh/yr

Demand that is suppressed today

People served

175k

What hardware costs right now

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

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 Ugwunagbo

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	8,224	1,823	₦5.6bn	₦5.58bn	23%	4.6 yr
B	6,394	2,812	₦4.93bn	₦4.87bn	25%	4.6 yr
D	5,017	1,046	₦3.73bn	₦3.42bn	23%	4.6 yr
E	4,320	625	₦2.24bn	₦2.24bn	23%	4.6 yr
A	1,154	1,143	₦1.48bn	₦1.48bn	47%	2.4 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	23,482	6,204	₦12.5bn	₦12.2bn	23%	4.6 yr
Commercial General	793	604	₦3.01bn	₦2.99bn	53%	1.9 yr
Commercial Retail	362	228	₦107m	₦107m	51%	2.1 yr
Anchor	225	203	₦1.81bn	₦1.73bn	63%	1.6 yr
Worship	124	114	₦223m	₦223m	59%	1.9 yr
Industrial	107	86	₦339m	₦338m	61%	1.6 yr
Filling Station	16	10	₦24.7m	₦24.7m	55%	1.9 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	8,724	2,678	₦7.28bn	₦7.27bn	25%	4.6 yr
50 100m2	6,324	1,758	₦1.39bn	₦1.39bn	23%	4.6 yr
Under 30m2	4,621	1,196	₦330m	₦213m	9%	9.6 yr
30 50m2	3,357	937	₦317m	₦317m	19%	5.6 yr
250 1000m2	2,065	866	₦7.85bn	₦7.58bn	25%	4.4 yr
Over 1000m2	18	14	₦811m	₦811m	55%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	14,222	2,695	₦8.87bn	₦8.62bn	23%	4.6 yr
Urban Centre	8,474	4,338	₦7.53bn	₦7.45bn	35%	3.1 yr
Unclassified	2,413	416	₦1.59bn	₦1.52bn	23%	4.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	8,694	1,851	₦1.62bn	₦1.51bn	23%	4.6 yr
Residential	6,961	1,609	₦9.14bn	₦8.95bn	25%	4.6 yr
Shed	4,719	702	₦85.5m	₦85.5m	9%	13.1 yr
Residential Informal	1,646	1,429	₦1.38bn	₦1.38bn	45%	2.4 yr
Residential Formal	1,225	514	₦203m	₦203m	23%	4.6 yr
Kiosk Shop	362	228	₦107m	₦107m	51%	2.1 yr
Commercial	352	276	₦1.63bn	₦1.61bn	65%	1.6 yr
Institutional	247	217	₦1.2bn	₦1.2bn	55%	1.9 yr
Commercial Corridor	174	104	₦549m	₦549m	39%	2.6 yr
Apartment	144	56	₦17.8m	₦17.8m	23%	4.6 yr
Educational Facility	79	69	₦366m	₦366m	77%	1.4 yr
Duplex	76	35	₦10.7m	₦10.7m	23%	4.6 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	25,109	7,449	₦18bn	₦17.6bn

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	24,266	6,791	₦13.7bn	₦13.4bn	23%	4.6 yr
SME High	539	387	₦2.2bn	₦2.19bn	55%	1.9 yr
Enterprise	304	271	₦2.09bn	₦2.01bn	63%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	12,812	3,601	₦13.3bn	₦13bn
0.0	4,738	712	₦87.3m	₦87.3m
2.0	4,395	1,384	₦1.01bn	₦893m
4.0	2,146	1,260	₦2.59bn	₦2.51bn
1.0	754	345	₦132m	₦132m
5.0	240	129	₦582m	₦582m
6.0	24	18	₦325m	₦325m