How to read your electricity usage graph
Many electricity bills in Spain include a usage graph.
Most people glance at it and ignore it, yet it is one of the most useful parts of the bill.
Understanding this graph helps explain why your bill changes and whether your tariff suits how you actually use electricity.
What the electricity usage graph shows
The usage graph usually displays:
- Electricity consumption over time
- Daily or monthly usage levels
- Seasonal patterns
It shows when your home uses the most energy, not just how much.
Why usage patterns matter more than price
Your usage pattern is often more important than the price per kWh.
For example:
- Homes that use more electricity during the day may benefit from solar-based tariffs
- Homes with higher evening usage may need time-of-use pricing
Choosing a tariff that does not match your pattern leads to unnecessary costs.
Seasonal changes and lifestyle factors
Electricity usage often changes through the year.
Common reasons include:
- Air conditioning in summer
- Heating or hot water in winter
- Pool pumps or irrigation systems
- More time spent at home during certain months
A single average price does not reflect these changes.
How we use your usage data
When you upload your electricity bill, we use the usage graph to:
- Understand when you use electricity
- Check whether your tariff fits your habits
- Identify savings opportunities
- Assess suitability for options like Octopus Sun Club
This allows us to make recommendations based on real data, not assumptions.
Get a professional usage analysis
Upload your electricity bill on our homepage and we will analyse your usage pattern for you.
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Frequently Asked Questions
What if my electricity bill does not include a usage graph?
Some older or simplified bills may not show a graph. However, you can always access your detailed usage data by registering on your distributor's online portal (e.g., i-DE, E-Distribución).
Does solar power change how I should read this graph?
Yes. If you have solar panels, your usage graph from the grid will drop significantly during sunny hours. Comparing this with your solar generation app gives the full picture of your total energy needs.
Can my usage pattern affect which tariff is best for me?
Absolutely. If you use most of your energy at night, an EV tariff might be best. If you work from home with AC, a flat-rate or solar-matching tariff could save you more.
Why does my usage change even when my habits feel the same?
Weather is the biggest factor. Heating in winter and AC in summer consume far more power than lights or appliances, causing spikes even if your daily routine hasn't changed.