Home Monthly kWh Consumption
Sums monthly kWh consumption of main appliances to estimate the bill.
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Household electricity consumption (kWh/month)
For each appliance, the monthly consumption works out to kWh = (watts × hours_per_day × days) / 1000, and what you pay is kWh × tariff. A four-person household in Brazil averages 150-200 kWh/month. Where does it go? The refrigerator eats about 30 kWh, the electric shower (5.5 kW, 15 min/day × 30 days) ~40 kWh, a 9,000 BTU air-conditioner run an hour a day around 30 kWh, LED lighting 5-10 kWh and the washing machine roughly 10 kWh. To see the math in action: a 1,500 W appliance running 4 h/day for 30 days = (1500 × 4 × 30)/1000 = 180 kWh, which at R$0.75/kWh comes to R$135. The ANEEL tariff flags (green/yellow/red) tack on a surcharge during dry seasons.
Applications
Trim the electricity bill, weigh keeping an old appliance against an inverter or LED replacement, size up rooftop solar PV, make sense of a Procel label, run an ISO 50001 audit, or just put together a household energy budget.
FAQ
Why is the electric shower the biggest villain? It pulls a lot of power (4-7 kW) and you use it in short bursts every day. For most Brazilian homes, swapping it for solar thermal or a gas heater is the one change that moves the needle the most.
Does standby consume? It does. TVs, set-top boxes and chargers sitting idle can add up to 5-15 kWh/month between them, and a power strip with a switch takes care of it.
How much do tariff flags add? During scarce-water periods the red flag level 2 puts roughly R$0.10/kWh on top of the base tariff, so a 200 kWh month ends up about R$20 pricier.
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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.