Measure before changing habits. Estimate each appliance’s kWh from wattage and hours, compare it with meter readings, then target long-running or high-power loads first.
Tiny devices are easy to blame, but heating, cooling, pumping and other high-power equipment usually offer larger savings than occasional phone charging.
The essentials
- Wattage on each appliance nameplate.
- Real operating hours, including automatic cycles.
- Baseline meter balance at the same time each day.
- Faults such as poor seals, clogged filters or leaking hot-water systems.
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.
- Wattage on each appliance nameplate.
- Real operating hours, including automatic cycles.
- Baseline meter balance at the same time each day.
- Faults such as poor seals, clogged filters or leaking hot-water systems.
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.
- List appliances by watts and daily hours.
- Estimate kWh and rank the largest loads.
- Change one behaviour or appliance setting at a time.
- Compare meter readings over similar days before keeping the change.
Mistakes to avoid
These shortcuts often turn a traceable problem into a second payment, a lost evidence trail or a safety risk.
- Judging consumption only from how quickly a naira balance falls after a tariff change.
- Turning off essential safety or refrigeration equipment blindly.
- Buying an energy-saving device without independent specifications.
When to escalate
If consumption remains implausibly high with major loads isolated, ask a qualified electrician to check the premises and report suspected meter faults to the DisCo.
Frequently asked
Which appliances usually use the most electricity?
High-power or long-running loads such as water heaters, air conditioners, pumps, irons, kettles and refrigeration often dominate, but measure your own equipment.
Does switching off at the wall save electricity?
It can eliminate standby use for some devices, but the largest savings normally come from reducing high-power operating time and fixing inefficient equipment.
Research sources
Official guidance, product information and public sources were reviewed on 27 July 2026.