Rivers State

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

Ikwerre has 109,746 buildings with a viable rooftop and 2.65 GWp of roof capacity. 42% run a generator, and together they spend ₦58.2bn a year on energy.

Viable buildings

109,746

Usable roof area

11.8 km²

2.65 GWp roof capacity

Energy spend

₦58.2bn/yr

53.8 GWh/yr burned on generators

Median payback

4.6 yr

Median IRR 25% (cash saved)

The savings bracket for Ikwerre

Approach B

Cash saved

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

Current energy spend₦58.2bn/yr

Year-one cash saved₦57.8bn

Lifetime cash saved₦3.05tn

NPV₦438bn

Median IRR25%

Median payback4.6 yr

Unlocked energy42 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity196 MWp

Capex₦189bn

Year-one energy value₦123bn

Lifetime energy value₦5.77tn

NPV₦924bn

Median IRR65%

Median payback1.6 yr

Three ways to size Ikwerre'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: 196 MWp
Capital cost: ₦189bn
Year 1 savings: ₦123bn/yr
NPV: ₦924bn
Median IRR: 65%
Median payback: 1.6 yr

The odds a rooftop in Ikwerre pays back quickly

Of the 107,889 buildings in Ikwerre with a modelled payback, 66.1% pay back inside five years and 36.1% inside three.

Create a free account

How much of Ikwerre's demand actually gets met

Buildings in Ikwerre consume 109 GWh/yr but want 151 GWh/yr. The 28% they cannot buy is suppressed demand — load that appears the moment supply is reliable.

Create a free account

Electricity billing bands in Ikwerre

Loading band economics…

How many rooftops in Ikwerre 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 107,889 buildings with a modelled result out of 109,746 in Ikwerre. 89,702 clear a positive NPV.

Payback

Under 3 years38,948 (36%)

Under 5 years71,289 (66%)

Under 7 years89,474 (83%)

Under 10 years98,668 (91%)

Return (IRR)

Above 10%97,479 (89%)

Above 15%89,702 (82%)

Above 20%76,437 (70%)

Above 25%45,849 (42%)

CO₂ avoided

104 kt/yr

Fuel avoided

25.5 million litres/yr

Energy unlocked

42 GWh/yr

Demand that is suppressed today

People served

198k

What hardware costs right now

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

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 Ikwerre

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
B	37,385	16,562	₦19.3bn	₦19.1bn	25%	4.4 yr
C	35,033	15,984	₦18.9bn	₦18.8bn	25%	4.4 yr
D	17,419	6,726	₦9.91bn	₦9.89bn	23%	4.6 yr
A	11,664	3,973	₦5.08bn	₦5.05bn	25%	4.6 yr
E	8,245	2,942	₦5.08bn	₦4.96bn	23%	4.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	108,093	45,006	₦32bn	₦32bn	25%	4.6 yr
Commercial General	793	562	₦5.08bn	₦5.07bn	47%	2.4 yr
Anchor	362	247	₦20.2bn	₦19.9bn	49%	2.1 yr
Commercial Retail	354	275	₦90.2m	₦90.2m	51%	2.1 yr
Worship	92	64	₦171m	₦171m	41%	2.6 yr
Hospitality	29	18	₦498m	₦477m	47%	2.4 yr
Industrial	19	11	₦65.8m	₦65.3m	53%	2.1 yr
Filling Station	2	2	₦7.77m	₦7.77m	43%	2.6 yr
Mall Retail	2	2	₦1.82m	₦1.82m	43%	2.4 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
100 250m2	40,716	17,890	₦14.5bn	₦14.5bn	25%	4.4 yr
50 100m2	22,593	9,050	₦2.09bn	₦2.09bn	23%	4.9 yr
Under 30m2	21,385	8,428	₦770m	₦769m	17%	6.1 yr
30 50m2	12,897	5,090	₦738m	₦737m	19%	5.4 yr
250 1000m2	11,835	5,533	₦18.3bn	₦18bn	25%	4.4 yr
Over 1000m2	320	196	₦21.7bn	₦21.7bn	43%	2.6 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban Centre	69,681	30,763	₦26bn	₦25.9bn	25%	4.6 yr
Dense Urban	20,347	8,269	₦13.9bn	₦13.9bn	25%	4.6 yr
Urban	13,007	5,870	₦12bn	₦11.7bn	25%	4.4 yr
Unclassified	6,556	1,285	₦6.3bn	₦6.28bn	23%	4.6 yr
Rural	155	0	₦19.3m	₦19.3m	25%	4.6 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential Formal	31,428	10,478	₦3.63bn	₦3.63bn	23%	4.6 yr
Residential	23,120	11,723	₦23.2bn	₦23.2bn	29%	3.9 yr
Residential Small	21,715	10,341	₦2.87bn	₦2.85bn	25%	4.6 yr
Shed	18,100	7,981	₦989m	₦989m	21%	5.1 yr
Residential Informal	13,729	4,482	₦1.38bn	₦1.38bn	25%	4.6 yr
Commercial Corridor	374	336	₦2.19bn	₦2.19bn	53%	1.9 yr
Kiosk Shop	354	275	₦90.2m	₦90.2m	51%	2.1 yr
Institutional	237	163	₦18bn	₦17.9bn	41%	2.6 yr
Unknown	213	92	₦554m	₦551m	31%	3.6 yr
Educational Facility	114	79	₦1.43bn	₦1.43bn	57%	1.9 yr
School	102	68	₦174m	₦174m	53%	2.1 yr
Place Of Worship	41	30	₦33.7m	₦33.7m	45%	2.4 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	109,547	46,152	₦58bn	₦57.6bn
Industrial	89	0	₦1.94m	₦1.94m
Commercial	83	35	₦159m	₦159m
Orchard	27	0	₦3.61m	₦3.61m

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	108,958	45,572	₦35.4bn	₦35.3bn	25%	4.6 yr
SME High	410	359	₦2.51bn	₦2.5bn	53%	1.9 yr
Enterprise	378	256	₦20.3bn	₦19.9bn	49%	2.1 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
3.0	31,512	14,632	₦38.6bn	₦38.2bn
2.0	30,522	13,281	₦4.36bn	₦4.34bn
4.0	25,292	8,706	₦12.9bn	₦12.9bn
0.0	18,038	7,978	₦988m	₦988m
1.0	4,341	1,567	₦271m	₦271m
5.0	34	20	₦873m	₦866m
6.0	7	3	₦190m	₦182m