Contracted Power for Businesses in Spain
For many companies in Spain, the biggest electricity problem is not the energy rate. It is paying for the wrong amount of contracted power month after month.
What is contracted power?
Contracted power, or potencia contratada, is the capacity the business reserves on the network. It is not the same as energy consumed. Even before the site uses a single kWh, the bill already reflects the power structure you agreed to.
That is why two businesses with similar consumption can still receive very different invoices. One may have a sensible contracted-power setup, while the other is paying for capacity that the site almost never needs.
Why it matters so much on business bills
On business tariffs, especially once the supply becomes more complex, contracted power can become one of the heaviest parts of the monthly cost.
It affects the fixed part of the invoice even in quieter months.
It shapes whether the tariff structure matches the operating profile.
If set too low, it can increase peak-risk and penalty exposure.
If set too high, the business simply overpays every month.
How businesses usually optimize it
The first step is checking whether the site is even on the right tariff structure. Start with 2.0TD vs 3.0TD, then review how the periods work under 3.0TD if the supply is already above the small-business threshold.
The second step is understanding real operating peaks. If the setup is badly aligned, the business can end up paying too much fixed capacity while still facing maximeter problems during short spikes.
Common contracted-power mistakes
The most expensive mistakes tend to be structural rather than dramatic. They sit on the bill month after month and slowly erode margin.
Copying old settings
Many businesses inherit old potencia levels from a previous operator, tenant, or opening-phase estimate and never revisit them.
Contracting for rare peaks
Some sites contract permanently for unusual or short-lived peaks instead of checking whether operating changes would be cheaper.
Ignoring period structure
On more complex business tariffs, the wrong power setup across periods can create a very expensive fixed-cost profile.
How to review potencia on the invoice
Start by understanding where contracted power appears on a Spanish business bill. If you want a faster answer, send the invoice for a free business bill check and we can flag whether the power setup looks too high, too tight, or simply outdated.
Related business guides
Think your business is over-contracted?
We can review one recent invoice and tell you whether the current power setup looks sensible for the site’s operating pattern.
Check My Business BillFAQ
Is contracted power the same as energy consumption?
No. Contracted power is the capacity reserved for the site, while energy consumption is the electricity actually used over time.
Can a business overpay even if its kWh price looks reasonable?
Yes. A business can have an acceptable energy rate but still overpay heavily because the contracted-power structure is wrong.
Why do hotels and restaurants often struggle with potencia?
Because they combine multiple systems with overlapping demand, such as HVAC, refrigeration, hot water, kitchens, and guest-comfort loads.
Should potencia be reviewed regularly?
Yes. It should be reviewed whenever operating hours, equipment, occupancy, or the overall business profile changes.