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    Imo State

    Rooftop solar in Ohaji/Egbema, Imo: what the roofs are worth

    Ohaji/Egbema has 63,574 buildings with a viable rooftop and 1.32 GWp of roof capacity. 53% run a generator, and together they spend ₦43.9bn a year on energy.

    Viable buildings

    63,574

    Usable roof area

    5.89 km²

    1.32 GWp roof capacity

    Energy spend

    ₦43.9bn/yr

    37.5 GWh/yr burned on generators

    Median payback

    3.6 yr

    Median IRR 29% (cash saved)

    The savings bracket for Ohaji/Egbema

    Approach B

    Cash saved

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

    Current energy spend₦43.9bn/yr
    Year-one cash saved₦43.2bn
    Lifetime cash saved₦2.28tn
    NPV₦334bn
    Median IRR29%
    Median payback3.6 yr
    Unlocked energy33.7 GWh/yr
    Approach A

    Energy value (upper bracket)

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

    Installed capacity142 MWp
    Capex₦145bn
    Year-one energy value₦104bn
    Lifetime energy value₦4.9tn
    NPV₦797bn
    Median IRR79%
    Median payback1.4 yr

    Three ways to size Ohaji/Egbema'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
    142 MWp
    Capital cost
    ₦145bn
    Year 1 savings
    ₦104bn/yr
    NPV
    ₦797bn
    Median IRR
    79%
    Median payback
    1.4 yr

    The odds a rooftop in Ohaji/Egbema pays back quickly

    Of the 63,240 buildings in Ohaji/Egbema with a modelled payback, 75.6% pay back inside five years and 45.2% inside three.

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    How much of Ohaji/Egbema's demand actually gets met

    Buildings in Ohaji/Egbema consume 74.4 GWh/yr but want 108 GWh/yr. The 31% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

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    Electricity billing bands in Ohaji/Egbema

    Loading band economics…

    How many rooftops in Ohaji/Egbema 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 63,240 buildings with a modelled result out of 63,574 in Ohaji/Egbema. 55,514 clear a positive NPV.

    Payback

    Under 3 years28,586 (45%)
    Under 5 years47,794 (76%)
    Under 7 years55,434 (88%)
    Under 10 years59,250 (94%)

    Return (IRR)

    Above 10%58,735 (92%)
    Above 15%55,514 (87%)
    Above 20%49,904 (78%)
    Above 25%36,850 (58%)
    CO₂ avoided

    80.1 kt/yr

    Fuel avoided

    21.1 million litres/yr

    Energy unlocked

    33.7 GWh/yr

    Demand that is suppressed today

    People served

    244k

    What hardware costs right now

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

    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 Ohaji/Egbema

    Electricity billing band

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B) Median IRR Median payback
    A31,02315,527₦18.2bn₦17.9bn25%4.4 yr
    C13,4617,751₦10.2bn₦9.99bn41%2.6 yr
    B11,4337,273₦8.93bn₦8.89bn47%2.4 yr
    E4,3871,822₦2.77bn₦2.73bn25%4.4 yr
    D3,2701,191₦3.79bn₦3.7bn25%4.4 yr

    Load profile

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B) Median IRR Median payback
    Residential61,55531,914₦33.3bn₦32.9bn27%4.1 yr
    Commercial General796699₦4bn₦4bn45%2.4 yr
    Anchor441335₦5.71bn₦5.39bn51%2.1 yr
    Commercial Retail302287₦62.8m₦62.8m43%2.6 yr
    Worship219152₦229m₦229m43%2.6 yr
    Industrial13092₦449m₦448m47%2.4 yr
    Productive Use5731₦25.2m₦25.2m39%2.6 yr
    Hospitality4832₦116m₦116m39%2.6 yr
    Filling Station2622₦28.3m₦28.3m39%2.6 yr

    Roof size band

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B) Median IRR Median payback
    100 250m219,43010,693₦14.4bn₦14.2bn35%3.1 yr
    Under 30m215,3017,684₦624m₦622m23%4.9 yr
    50 100m213,7947,063₦2.47bn₦2.44bn27%4.1 yr
    30 50m28,7804,362₦667m₦666m25%4.4 yr
    250 1000m26,1773,689₦20.5bn₦20.3bn41%2.6 yr
    Over 1000m29273₦5.22bn₦5bn61%1.6 yr

    Settlement type

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B) Median IRR Median payback
    Dense Urban29,68017,443₦17.7bn₦17.4bn37%2.9 yr
    Urban22,58112,543₦16.2bn₦16.2bn33%3.4 yr
    Unclassified8,2642,323₦7.46bn₦7.21bn25%4.4 yr
    Rural2,8851,099₦2.02bn₦2.02bn25%4.4 yr
    Urban Centre164156₦451m₦408m43%2.4 yr

    Building type

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B) Median IRR Median payback
    Residential Small19,81311,205₦3.28bn₦3.26bn33%3.1 yr
    Residential17,82510,352₦28bn₦27.6bn39%2.6 yr
    Shed14,2616,712₦609m₦609m23%4.9 yr
    Residential Formal6,7863,069₦1.15bn₦1.15bn25%4.4 yr
    Residential Informal2,242207₦129m₦129m23%4.6 yr
    Apartment380243₦72.5m₦72.5m33%3.4 yr
    Commercial Corridor367360₦1.18bn₦1.18bn45%2.4 yr
    Kiosk Shop352314₦85.8m₦85.8m41%2.6 yr
    Institutional325246₦4.46bn₦4.24bn45%2.4 yr
    Duplex235118₦54m₦54m25%4.4 yr
    Commercial139126₦1.7bn₦1.7bn53%1.9 yr
    Educational Facility130105₦619m₦619m63%1.6 yr

    Land use

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B)
    (Unset)63,16133,458₦43.8bn₦43.1bn
    Industrial397105₦113m₦113m
    Orchard161₦181k₦181k

    Not published for this cube: Median IRR, Median payback.

    Lead segment

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B) Median IRR Median payback
    Standard62,48332,636₦34.9bn₦34.5bn27%3.9 yr
    Enterprise546411₦6.07bn₦5.75bn51%2.1 yr
    SME High545517₦2.89bn₦2.89bn45%2.4 yr

    Demand tier

    SegmentBuildings With generator Spend ₦/yr Cash saved yr 1 (B)
    3.028,24015,765₦36bn₦35.3bn
    0.014,2616,718₦610m₦610m
    2.011,1055,949₦2.58bn₦2.52bn
    4.07,4733,648₦3.56bn₦3.55bn
    1.02,3571,350₦275m₦275m
    5.0119116₦764m₦764m
    6.01918₦151m₦151m

    Not published for this cube: Median IRR, Median payback.

    Nearby LGAs in Imo

    Owerri North103,592 buildingsOwerri West101,430 buildingsMbatoli98,805 buildingsOrlu86,065 buildingsOwerri Municipal77,944 buildingsIdeato North74,322 buildingsAboh-Mbaise70,387 buildingsOru West64,792 buildingsNgor-Okpala61,667 buildingsIkeduru61,555 buildingsEhime-Mbano59,753 buildingsOru East57,424 buildings