Time-of-Use Tariffs: €120 Savings in 10 Months

Time-of-Use Tariffs: €120 Savings in 10 Months and the Standby Power Nobody Cuts

How much can you save on your electricity bill without changing your lifestyle? The answer circulating among those who have tried time-of-use tariffs (TOU) ranges from a 20% to a 40% cut, according to cases shared in the thread. One specific example: moving from monthly bills of €100 to bimonthly bills of €80–€100, even while consuming more kilowatt-hours, as reported by a forum user. The trick isn't using less energy; it's using it better.

The mechanism is simple to explain but tedious to execute. TOU splits the day into two periods: a peak period, which is 20% more expensive, and an off-peak period that can be three times cheaper. In the conversation, prices for the 2.0 DHA tariff are cited at €0.17 per kWh during peak hours and €0.06 during off-peak hours, compared to €0.15 for standard non-discriminatory rates. The cheap schedule covers 14 hours in summer and one hour less in winter, from 10 PM to 12 PM.

The 200-Watt Standby Load Nobody Measures

Here is the data that surprises many: a home with TV, stereo system, computer, oven, microwave, washing machine, induction hob, and air conditioning plugged in permanently can maintain a consumption of between 200 and 300 watts in standby mode, according to measurements shared by a forum user. Twelve hours a day, thirty days a month, equals 90 kWh lost without anything actually running. At an average price of €0.25 including taxes, that’s €22 per month.

The proposed solution is almost aggressively simple: when leaving the house, turn off the circuit breakers. Two seconds. The fridge has its own circuit and keeps working; everything else drops to zero. The downside is losing the clock settings on ovens and video players. Some argue that meters have a 120-watt offset and invent part of the consumption, while others remind us that devices with inverters contain switching electronics that shouldn't be forcibly shut down.

The Fine Print: How Many Switches Can a Breaker Handle?

Reasonable doubt arises quickly. A residual current device (RCD) withstands approximately a thousand switches before causing problems, according to an electrician mentioned in the discussion. Flipping the main panel twice a day for years is tempting fate. Replacement costs about €25, and swapping it is easy if the main switch is turned off first. A less aggressive alternative: lower the miniature circuit breakers below instead of the RCD.

Savings don't come only from the breaker box. Washing machines, dryers, dishwashers, pool pumps, and programmed water heaters go into the off-peak slot. Induction hobs and ovens are used normally, because the pro-ardilla calculation between expensive and cheap hours still favors this approach, according to those applying the method. Contracted power drops to 4.4 or even 3.3 kW without tripping the automatic switch, and some note that the system tolerates brief overloads for a few minutes.

The Comparator That Doesn't Add Up

Aside from the free market, the discussion drifted toward where to contract. Regulated tariff prices coexist with offers promising a 2% discount during off-peak hours, and with retailers who appear in the official comparator without maintenance services they later impose on customers, as denounced by a participant. The repeated warning: today's cheap offer is tomorrow's inflated rate, once the customer stops paying attention.

The practical summary derived from all this: TOU doesn't reward those who consume less; it rewards those who consume at the right time. And the real enemy isn't the price per kWh; it's the silent drip of devices in standby. With these numbers, the question isn't whether it pays off. It's why more people don't do it.

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