Benue State

Rooftop solar in Okpokwu, Benue: what the roofs are worth

Okpokwu has 66,844 buildings with a viable rooftop and 878 MWp of roof capacity. 22% run a generator, and together they spend ₦20.1bn a year on energy.

Viable buildings

66,844

Usable roof area

3.94 km²

878 MWp roof capacity

Energy spend

₦20.1bn/yr

18.2 GWh/yr burned on generators

Median payback

5.4 yr

Median IRR 21% (cash saved)

The savings bracket for Okpokwu

Approach B

Cash saved

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

Current energy spend₦20.1bn/yr

Year-one cash saved₦19.3bn

Lifetime cash saved₦990bn

NPV₦158bn

Median IRR21%

Median payback5.4 yr

Unlocked energy17.4 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity90.6 MWp

Capex₦95.4bn

Year-one energy value₦90.5bn

Lifetime energy value₦4.3tn

NPV₦731bn

Median IRR103%

Median payback1.1 yr

Three ways to size Okpokwu'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: 90.6 MWp
Capital cost: ₦95.4bn
Year 1 savings: ₦90.5bn/yr
NPV: ₦731bn
Median IRR: 103%
Median payback: 1.1 yr

The odds a rooftop in Okpokwu pays back quickly

Of the 66,090 buildings in Okpokwu with a modelled payback, 47.2% pay back inside five years and 22.0% inside three.

Create a free account

How much of Okpokwu's demand actually gets met

Buildings in Okpokwu consume 27.3 GWh/yr but want 44.7 GWh/yr. The 39% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Okpokwu

Loading band economics…

How many rooftops in Okpokwu 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 66,090 buildings with a modelled result out of 66,844 in Okpokwu. 40,438 clear a positive NPV.

Payback

Under 3 years14,513 (22%)

Under 5 years31,181 (47%)

Under 7 years40,405 (61%)

Under 10 years45,968 (70%)

Return (IRR)

Above 10%44,523 (67%)

Above 15%40,438 (60%)

Above 20%34,069 (51%)

Above 25%26,162 (39%)

CO₂ avoided

36.1 kt/yr

Fuel avoided

10.5 million litres/yr

Energy unlocked

17.4 GWh/yr

Demand that is suppressed today

People served

280k

What hardware costs right now

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

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 Okpokwu

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
D	23,582	5,125	₦8.59bn	₦8.08bn	21%	5.1 yr
E	22,857	5,373	₦6.77bn	₦6.5bn	19%	5.4 yr
C	20,292	4,033	₦4.73bn	₦4.71bn	21%	5.4 yr
B	113	1	₦1.51m	₦1.51m	13%	7.9 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	65,321	13,176	₦16.5bn	₦15.7bn	19%	5.4 yr
Commercial General	482	418	₦1.24bn	₦1.24bn	57%	1.9 yr
Anchor	442	401	₦1.86bn	₦1.86bn	75%	1.4 yr
Worship	407	389	₦326m	₦326m	59%	1.9 yr
Commercial Retail	124	83	₦23.2m	₦23.2m	45%	2.4 yr
Industrial	43	40	₦82.6m	₦82.6m	69%	1.6 yr
Productive Use	14	14	₦3.34m	₦3.34m	59%	1.9 yr
Hospitality	11	11	₦13m	₦13m	61%	1.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
50 100m2	20,083	4,044	₦2.47bn	₦2.43bn	23%	4.6 yr
Under 30m2	18,390	3,194	₦271m	₦270m	7%	15.6 yr
30 50m2	13,379	2,315	₦442m	₦442m	9%	9.6 yr
100 250m2	13,134	4,012	₦8.3bn	₦8.11bn	27%	4.1 yr
250 1000m2	1,798	925	₦7.35bn	₦6.79bn	51%	2.1 yr
Over 1000m2	60	42	₦1.26bn	₦1.25bn	63%	1.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Unclassified	22,713	3,214	₦5.74bn	₦5.35bn	19%	5.6 yr
Rural	19,742	3,008	₦4.04bn	₦4.03bn	15%	6.6 yr
Dense Urban	12,676	3,679	₦3.72bn	₦3.72bn	23%	4.6 yr
Urban	11,713	4,631	₦6.59bn	₦6.2bn	27%	4.1 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Small	24,248	5,107	₦2.88bn	₦2.83bn	23%	4.6 yr
Shed	23,325	4,107	₦324m	₦324m	7%	14.6 yr
Residential	10,743	3,621	₦12.8bn	₦12bn	27%	4.1 yr
Residential Formal	5,262	147	₦144m	₦144m	17%	6.4 yr
Residential Informal	1,364	171	₦385m	₦385m	25%	4.1 yr
Institutional	401	373	₦1.59bn	₦1.58bn	57%	1.9 yr
Apartment	338	18	₦10.3m	₦10.3m	23%	4.6 yr
Commercial	174	142	₦680m	₦680m	53%	1.9 yr
Educational Facility	162	150	₦300m	₦300m	83%	1.4 yr
Worship Center	149	143	₦73.2m	₦73.2m	63%	1.6 yr
Kiosk Shop	137	96	₦26.2m	₦26.2m	51%	2.1 yr
School	128	117	₦141m	₦141m	81%	1.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	66,844	14,532	₦20.1bn	₦19.3bn

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	66,197	13,961	₦17.5bn	₦16.7bn	21%	5.4 yr
Enterprise	465	423	₦1.92bn	₦1.91bn	73%	1.4 yr
SME High	182	148	₦692m	₦692m	53%	1.9 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	23,333	4,116	₦323m	₦323m
3.0	17,726	5,346	₦14.4bn	₦13.7bn
2.0	14,553	3,528	₦3.51bn	₦3.41bn
4.0	5,960	335	₦1.14bn	₦1.14bn
1.0	5,212	1,167	₦540m	₦540m
5.0	53	34	₦161m	₦161m
6.0	7	6	₦64m	₦64m