Seasonal energy guide

Why electricity use changes during harmattan—and how to measure it

Separate seasonal appliance changes from tariff, debt and meter problems when electricity seems to finish faster during harmattan.

Compare kWh—not only naira—across similar periods. Harmattan can change heating, lighting and appliance habits, while dust can reduce cooling and equipment efficiency; tariff or debt changes can also reduce units purchased.

There is no reliable universal percentage increase for every Nigerian household. Region, appliances, occupancy and weather differ, so measure your own baseline.

Keep this in mind

The essentials

  • kWh bought and used before and during harmattan.
  • New use of kettles, heaters, hot-water systems or longer lighting hours.
  • Dust on filters, vents and refrigerator coils.
  • Any tariff or account deduction change on receipts.

What to check first

Start with the evidence already in front of you. A precise account, meter, product or safety detail is more useful than guessing from the outcome alone.

  • kWh bought and used before and during harmattan.
  • New use of kettles, heaters, hot-water systems or longer lighting hours.
  • Dust on filters, vents and refrigerator coils.
  • Any tariff or account deduction change on receipts.

Step by step

Work through the existing transaction, account or installation in order. Keep the reference and result from each step before moving to the next.

  • Record seven normal days of meter readings and appliance use.
  • Clean serviceable filters and vents with equipment safely off.
  • Estimate new seasonal loads from watts and hours.
  • Build the budget from measured kWh and the current tariff.

Mistakes to avoid

These shortcuts often turn a traceable problem into a second payment, a lost evidence trail or a safety risk.

  • Applying a generic 20% or 50% multiplier without measurement.
  • Assuming every faster balance drop is a meter fault.
  • Opening equipment or sealed meters to clean internally.

When to escalate

If kWh use remains implausible after comparing like-for-like days and isolating major loads, arrange a safe installation check and report suspected meter faults.

Common questions

Frequently asked

Does harmattan always increase electricity consumption?

No. Some households may use less cooling while others add heating or hot-water loads. The direction and size depend on actual behaviour and location.

Can dust increase appliance consumption?

Clogged filters and obstructed heat exchange can make some appliances work harder. Follow manufacturer-safe cleaning instructions.

Research sources

Official guidance, product information and public sources were reviewed on 27 July 2026.

  1. U.S. Department of Energy guide to energy-efficient lighting
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