Katsina State

Rooftop solar in Charanchi, Katsina: what the roofs are worth

Charanchi has 91,685 buildings with a viable rooftop and 493 MWp of roof capacity. 5% run a generator, and together they spend ₦6.16bn a year on energy.

Viable buildings

91,685

Usable roof area

2.25 km²

493 MWp roof capacity

Energy spend

₦6.16bn/yr

4.61 GWh/yr burned on generators

Median payback

13.4 yr

Median IRR 9% (cash saved)

The savings bracket for Charanchi

Approach B

Cash saved

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

Current energy spend₦6.16bn/yr

Year-one cash saved₦6.13bn

Lifetime cash saved₦351bn

NPV₦49.5bn

Median IRR9%

Median payback13.4 yr

Unlocked energy9.37 GWh/yr

Approach A

Energy value (upper bracket)

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

Installed capacity57.1 MWp

Capex₦62bn

Year-one energy value₦67.6bn

Lifetime energy value₦3.2tn

NPV₦555bn

Median IRR107%

Median payback0.9 yr

Three ways to size Charanchi'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: 57.1 MWp
Capital cost: ₦62bn
Year 1 savings: ₦67.6bn/yr
NPV: ₦555bn
Median IRR: 107%
Median payback: 0.9 yr

The odds a rooftop in Charanchi pays back quickly

Of the 91,352 buildings in Charanchi with a modelled payback, 27.0% pay back inside five years and 5.3% inside three.

Create a free account

How much of Charanchi's demand actually gets met

Buildings in Charanchi consume 14.4 GWh/yr but want 23.8 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 Charanchi

Loading band economics…

How many rooftops in Charanchi 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 91,352 buildings with a modelled result out of 91,685 in Charanchi. 32,888 clear a positive NPV.

Payback

Under 3 years4,869 (5%)

Under 5 years24,680 (27%)

Under 7 years32,968 (36%)

Under 10 years43,530 (48%)

Return (IRR)

Above 10%39,489 (43%)

Above 15%32,888 (36%)

Above 20%26,929 (29%)

Above 25%21,087 (23%)

CO₂ avoided

13.8 kt/yr

Fuel avoided

2.31 million litres/yr

Energy unlocked

9.37 GWh/yr

Demand that is suppressed today

People served

236k

What hardware costs right now

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

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 Charanchi

Electricity billing band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
C	28,440	1,059	₦1.72bn	₦1.72bn	9%	13.4 yr
E	24,211	346	₦1.26bn	₦1.26bn	7%	14.9 yr
D	23,426	944	₦988m	₦985m	7%	14.9 yr
B	15,608	1,869	₦2.19bn	₦2.16bn	23%	4.6 yr

Load profile

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Residential	89,730	3,377	₦4.16bn	₦4.13bn	9%	13.4 yr
Commercial Retail	1,070	379	₦75.5m	₦75.5m	37%	2.9 yr
Commercial General	521	216	₦586m	₦586m	39%	2.9 yr
Anchor	256	180	₦1.32bn	₦1.32bn	61%	1.6 yr
Worship	78	60	₦15.5m	₦15.5m	61%	1.6 yr
Industrial	30	6	₦10.1m	₦10.1m	39%	2.6 yr

Roof size band

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Under 30m2	52,763	1,681	₦258m	₦258m	5%	15.9 yr
30 50m2	22,369	1,090	₦482m	₦480m	11%	8.9 yr
50 100m2	13,032	910	₦1.31bn	₦1.31bn	31%	3.4 yr
100 250m2	3,113	421	₦1.84bn	₦1.81bn	31%	3.4 yr
250 1000m2	395	107	₦1.34bn	₦1.34bn	33%	3.4 yr
Over 1000m2	13	9	₦938m	₦938m	57%	1.9 yr

Settlement type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Urban	56,051	2,346	₦4.15bn	₦4.11bn	7%	14.1 yr
Dense Urban	17,651	1,807	₦1.55bn	₦1.55bn	23%	4.9 yr
Unclassified	13,343	47	₦402m	₦402m	5%	16.9 yr
Rural	4,640	18	₦67.5m	₦67.5m	9%	9.9 yr

Building type

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)	Median IRR	Median payback
Shed	62,809	1,959	₦274m	₦274m	7%	15.1 yr
Residential Small	15,330	856	₦1.47bn	₦1.47bn	31%	3.4 yr
Residential Informal	5,482	259	₦190m	₦190m	25%	4.4 yr
Residential	3,529	303	₦2.19bn	₦2.16bn	31%	3.4 yr
Residential Formal	2,578	0	₦28.1m	₦26.2m	19%	5.9 yr
Kiosk Shop	1,070	379	₦75.5m	₦75.5m	37%	2.9 yr
Commercial	300	118	₦267m	₦267m	39%	2.9 yr
Institutional	166	114	₦928m	₦928m	59%	1.9 yr
Educational Facility	79	58	₦121m	₦121m	91%	1.1 yr
Healthcare Facility	77	48	₦410m	₦410m	57%	1.9 yr
Commercial Corridor	71	3	₦38.5m	₦38.5m	37%	2.9 yr
School	53	39	₦60.3m	₦60.3m	89%	1.1 yr

Land use

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
(Unset)	91,685	4,218	₦6.16bn	₦6.13bn

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	91,054	3,915	₦4.53bn	₦4.5bn	9%	13.4 yr
SME High	371	121	₦306m	₦306m	37%	2.9 yr
Enterprise	260	182	₦1.32bn	₦1.32bn	61%	1.6 yr

Demand tier

Segment	Buildings	With generator	Spend ₦/yr	Cash saved yr 1 (B)
0.0	60,596	1,703	₦254m	₦254m
2.0	11,195	714	₦1.24bn	₦1.24bn
3.0	8,242	760	₦3.67bn	₦3.64bn
1.0	7,921	871	₦515m	₦515m
4.0	3,567	134	₦259m	₦259m
5.0	140	26	₦97.1m	₦97.1m
6.0	24	10	₦127m	₦127m