The 5 Worst Decisions That Spike Your Electricity Bill in Summer
Paying more for electricity in summer and don’t know why?
Summer is one of the times when household energy consumption rises the most. Intensive use of air conditioning, appliances and small habits that go unnoticed can have a brutal impact on your bill. At Renovae we tell you the most common mistakes and how to avoid them.
1. Using the air conditioning with no control or strategy
It’s the summer classic. Air conditioning accounts for up to 50% of daily consumption in many homes during the hottest months.
- Mistake: leaving it on all day, even when no one is home.
- Tip: use timers, keep it between 24–26 °C, and support it with fans to distribute the air.
What’s more, keeping the filters clean can reduce its consumption by up to 15%.
2. Charging devices and running appliances during peak hours
Many users don’t know their tariff may have time-of-use pricing. Charging your phone, running the washing machine or cooking at midday can cost twice as much as doing it at night or in the morning.
Does your tariff have time bands? If you don’t know, you’re losing money. At Renovae we analyse your bill and tell you whether you can switch to a more efficient one.
3. Trusting that your tariff is “good” because you’ve always had it
The energy market changes. What was cheap a year ago may not be now. Many people stick with their current tariff out of lack of knowledge or convenience, without realising there are better options available.
- Tip: review your tariff at least once a year or whenever your habits change (remote working, new appliances, more people at home…)
4. Ignoring “hidden” or phantom consumption
Appliances on standby (TV, routers, plugged-in chargers, microwaves…) keep consuming energy even when not in use.
In summer, this multiplies because we tend to have more devices connected. You can save up to €6–10 a month by unplugging them or using smart power strips.
5. Not adapting your routine to the cheapest hours
In summer there’s more daylight and more free time… but many people keep inefficient routines: ironing at 7pm, running the washing machine at midday, using the oven when it’s 40 °C outside.
Small changes to your schedule can translate into savings of up to 20% a month.
How to avoid all these mistakes at once?
With a free energy audit you can:
- Detect bad habits that raise your consumption
- Review your tariff and contracted power
- Apply personalised efficiency strategies
At Grupo Renovae we help hundreds of homes every month reduce their bill, with no building work and without changing their lifestyle.
What if you already do all this but still pay a lot?
In that case, we can look at other options:
- Adapt your tariff to your new habits
- Install a tailored self-consumption system (even without panels)
- Implement energy backup or advanced efficiency solutions
The key is not to assume that what you have is the best.
Real cases: common mistakes we’ve found
- Customer A: kept the AC at 21 °C all day. Adjustment: +3 °C and use of a timer. Saving: €28/month.
- Customer B: ran the washing machine and dishwasher at 2pm. Schedule change: 22% saving on monthly consumption.
- Customer C: didn’t know they had a time-of-use tariff. After the change: 17% less on their bill without changing routines.
Want to check whether you’re making any of these mistakes?
At Renovae we review it with you, step by step, at no cost. You only need your last bill and five minutes. You don’t need to switch providers if you don’t want to.