"Won't an AC destroy my electricity bill?" is one of the first questions we hear from people considering one for the first time. It's a fair question — and the honest answer is that it depends heavily on the unit you choose and how you use it. Here's how to actually work out the cost, using Uganda's current electricity tariffs.
The Basic Formula
Electricity cost is calculated as: wattage ÷ 1000 × hours used × cost per unit (kWh). As of the current ERA-regulated tariff, domestic consumers in Uganda pay approximately UGX 756 per unit (kWh) beyond the first 15 subsidised "lifeline" units, which are charged at UGX 250 per unit. These rates are reviewed quarterly by the Electricity Regulatory Authority, so it's worth checking your latest bill for the exact current rate.
A Real Example
A typical 1.5HP inverter split unit uses roughly 1,100–1,200 watts at full load, but draws considerably less once it reaches your set temperature and shifts into its lower-power maintenance mode. Running such a unit for 8 hours a day at an average draw closer to 700–800 watts (accounting for the inverter slowing down) works out to roughly 6 units (kWh) per day — at UGX 756 per unit, that's approximately UGX 4,500 per day, or around UGX 135,000 per month of continuous daily use. A non-inverter unit of the same capacity, running at full power for the same hours without slowing down, would typically cost noticeably more over the same period.
These figures are estimates for illustration — your actual cost depends on your specific unit's efficiency, the room's insulation, the outdoor temperature, and your usage pattern.
5 Ways to Cut Your AC Electricity Bill
1. Choose an inverter unit.
As covered in our inverter vs. non-inverter comparison, inverter units use meaningfully less power over time than fixed-speed models of the same capacity.
2. Set the temperature to 24–25°C, not lower.
Every degree colder than necessary increases power draw. 24–25°C is comfortable for most people and significantly more efficient than running at 18–20°C.
3. Keep the unit properly maintained.
A dirty filter or coil forces the compressor to work harder to achieve the same cooling — regular servicing keeps the system running at its intended efficiency.
4. Use timer and sleep functions.
Most units let you schedule the AC to switch off or step down automatically overnight or when a room is empty, rather than running at full settings the whole time.
5. Reduce heat entering the room.
Curtains or blinds during peak sun hours, and keeping doors closed while the AC runs, reduce how hard the unit has to work to maintain temperature.
Get a System That Fits Your Budget
Air Options (U) LTD can help you choose a unit sized and specified to minimise your running costs, not just your upfront price. Contact us for an honest recommendation, or see our maintenance plans to keep your system running efficiently long-term.