Potencia Contratada in Spain: How to Get Your Power Level Right

Every electricity contract in Spain has two elements: what you pay per kWh you consume (the energy charge), and what you pay per kW of capacity you have contracted (the power charge). The second element — potencia contratada — is a fixed monthly amount billed regardless of whether you actually use that capacity. Get it wrong and you either pay too much every month, or your circuit breaker trips every time you try to run the oven and the air conditioning simultaneously.

This guide explains what potencia contratada is, how to calculate what you actually need, the 2.0TD dual-setting option, and how to change it — with specific attention to the mistakes that expats on the Costa del Sol most commonly make.

What Potencia Contratada Is (And What It Isn’t)

Potencia contratada is the maximum electrical power your home is permitted to draw from the grid at any single moment. It is measured in kilowatts (kW).

Think of it like a water pipe. You can have a large tank (connected to the grid), but the pipe leading into your house has a fixed diameter. Potencia contratada is that diameter. If you try to pull more water through than the pipe allows — by running too many appliances simultaneously — the ICP (your breaker) cuts power to prevent overload.

You pay for this capacity in your monthly término de potencia — a fixed charge per kW per day. A higher potencia means a higher standing charge, whether you use the capacity or not. Under the 2.0TD tariff structure (the standard domestic tariff in Spain since 2021), this charge varies by time period (P1 and P2), but the principle is the same.

Potencia contratada has nothing to do with how much electricity you use. If you use zero electricity in a month, you still pay the potencia charge. This is the element of the bill that many people misunderstand when they see their bill and wonder why it’s so high even in a month when the house was empty.

For more on how all the bill elements work together, see our guide on how to read your Spanish electricity bill.

Available Potencia Levels in Spain

Under the 2.0TD domestic tariff (for supply points with contracted potencia up to 15kW), the available levels are defined by the regulator and typically increment in standardised steps:

• 2.3 kW
• 3.45 kW
• 4.6 kW
• 5.75 kW
• 6.9 kW
• 8.05 kW
• 9.2 kW
• 10.35 kW
• 11.5 kW
• 14.49 kW

Above 15kW, you move onto the 3.0TD tariff, which is a commercial-scale contract. The vast majority of domestic properties on the Costa del Sol sit somewhere between 3.45kW and 9.2kW.

Typical Potencia by Property Type: Costa del Sol

There is no universal rule, but the following ranges reflect what residents in similar properties typically use — and what tends to work without constant tripping:

Property Type	Typical Potencia	Notes
Studio or 1-bed apartment	3.45 kW	Works without AC or single small unit. Minimum available.
2-bed apartment, no AC	3.45–4.6 kW	Fine for moderate simultaneous use.
2-bed apartment, with AC	4.6–5.75 kW	AC + cooking + one other appliance requires at least 4.6kW.
3-bed house or townhouse	5.75–6.9 kW	Multiple AC units, oven, washing machine simultaneously.
Villa with pool (no workshop)	6.9–9.2 kW	Pool pump adds 0.75–1.5kW continuous draw.
Villa with pool, AC and workshop	9.2 kW+	Power tools + pool + AC simultaneously.

These are starting points. The actual figure that works for you depends on your specific appliances and how you use them — particularly whether you tend to run multiple large appliances at the same time.

The Maths: What Your Appliances Actually Draw

The ICP trips when your simultaneous demand — the combined draw of everything running at the same time — exceeds your contracted potencia. The relevant question is not what any single appliance draws, but what is running concurrently at the moment the breaker trips.

Typical power draws for common appliances:

Appliance	Typical Draw	Notes
Split AC unit (1 room)	0.8–2.0 kW	Higher at startup, then settles. Older units draw more.
Electric oven	2.0–3.0 kW	Full draw when heating up, cycles lower when up to temperature.
Electric hob (per ring)	1.5–2.0 kW	Two rings on = 3–4kW. Induction hobs can be higher.
Washing machine	0.5–1.0 kW	Higher at the start of a hot wash cycle.
Tumble dryer	2.0–3.0 kW	Often the hidden culprit — rarely thought of as a big draw.
Pool pump	0.75–1.5 kW	Runs continuously when programmed. Variable-speed pumps draw less.
Dishwasher	1.0–2.0 kW	Heating element is the high-draw phase.
Electric kettle	1.5–2.0 kW	Short burst but high draw — enough to tip the balance.
Microwave	0.8–1.2 kW	Usually not the primary cause of tripping, but adds to total.
Desktop computer + monitors	0.2–0.5 kW	Lower than most people assume.
Refrigerator	0.1–0.25 kW	Continuous but low. Spikes briefly when compressor starts.

The Remote Worker Scenario

This catches people on the Costa del Sol particularly hard. If you work from home and are on 3.45kW: AC running (1.5kW) + video call setup with monitors (0.3kW) + coffee machine mid-morning (1.3kW) = 3.1kW, which is fine. Then someone makes toast (0.9kW) and you’re at 4.0kW. The ICP trips.

Readers who work remotely have reported this scenario repeatedly — it became a real issue particularly as summer temperatures climbed and AC went from occasional to constant. If you’re full-time at home, add 1.5–2kW to your off-season estimate when sizing your potencia.

The Summer Villa Scenario

Pool pump running (1.2kW) + AC in the living room (1.5kW) + oven preheating (2.5kW) = 5.2kW. On a 4.6kW contract, this trips the breaker. It’s not a fault — it’s physics. Either schedule the pool pump to run overnight (off-peak, when the oven isn’t on), or increase potencia to 5.75kW.

The 2.0TD Dual Potencia Setting: P1 and P2

Under Spain’s current standard domestic tariff (2.0TD, in force since June 2021), you can contract two different potencia levels for two different time periods:

• P1 (peak period): Monday to Friday, 08:00–00:00
• P2 (off-peak period): Monday to Friday, 00:00–08:00 + all day Saturday, Sunday, and public holidays

The standing charge per kW per day is higher in P1 than in P2 (roughly 60/40 split between periods, varying by season). This means you can reduce costs by setting a lower potencia for the period when you don’t need the capacity.

Practical Example: Two-Person Apartment, Work From Home

• P1 potencia: 4.6kW — covers daytime working, cooking, AC on warm days
• P2 potencia: 3.45kW — overnight, only fridge, router, and standby devices running

The saving: instead of paying for 4.6kW across all hours, you pay for 3.45kW during P2. Since P2 covers 8 hours every weeknight plus all weekend, this represents a meaningful reduction in the fixed portion of your bill.

Practical Example: Villa with Pool

• P1 potencia: 6.9kW — covers daytime AC, cooking, normal household use
• P2 potencia: 4.6kW — pool pump scheduled to run 02:00–06:00, fridge and standby only otherwise

Alternatively, if you want to maximise off-peak electricity use (which is cheaper per kWh in PVPC):

• Set your washing machine, dishwasher, and pool pump to run on timers in the P2 window
• Set P2 potencia higher to accommodate the scheduled loads
• Keep P1 potencia at what you need for human-active hours

The dual potencia option is available to anyone on the 2.0TD tariff — both PVPC and most free-market tariffs that use the 2.0TD structure. Ask your supplier to confirm they support P1/P2 potencia settings. Some suppliers only allow a single potencia level even under 2.0TD — this varies by contract. If yours doesn’t support it, and you want to use the dual setting, switching suppliers is an option. See our guide on switching electricity in Spain.

Why Your ICP (Breaker) Keeps Tripping

The ICP — Interruptor de Control de Potencia — is set to your contracted potencia. When the combined draw from all running appliances exceeds this level for more than a few seconds, the ICP disconnects the supply.

There are two types of ICP in use in Spain:

Mechanical ICP (Older Properties)

The older physical breaker — a grey box separate from your main fuse board. It is calibrated to your contracted potencia and trips mechanically when demand exceeds it. If your property was last connected before approximately 2009–2012, you likely have one of these. They are relatively unforgiving — a brief spike from an appliance starting up can trigger a trip even if the sustained demand wouldn’t exceed the limit.

If you increase your contracted potencia above the current calibration of the mechanical ICP, an electrician must physically adjust or replace the ICP to match the new level. This is the “possible electrician work” involved in increasing potencia — it is often required for older properties. Cost: approximately €50–100 for the visit and adjustment.

Digital ICP / Smart Meter (Newer Properties)

Modern digital meters (telegestión-capable smart meters) have an integrated electronic ICP that is configured remotely by the distribuidora when your contracted potencia changes. No electrician visit is required — the distribuidora reprograms the meter through the grid communication system. This is the case for most properties that have had smart meter installation (required by regulation for supplies above certain consumption levels; the rollout is largely complete across Andalucía).

Digital ICPs are also generally more tolerant of brief spikes — a momentary overload from an appliance starting won’t necessarily trip the ICP unless sustained demand genuinely exceeds the limit. This makes living at or near your potencia limit slightly more manageable than with a mechanical ICP.

What Is Not the ICP

Your fuse board (cuadro eléctrico) also has circuit breakers — the MCBs (miniature circuit breakers) protecting individual circuits. These trip on fault conditions (short circuits, overloads on a specific circuit) rather than on total potencia demand. If a specific appliance trips a breaker and no others are affected, that is an MCB, not the ICP. If everything in the house goes off simultaneously, that is the ICP.

How to Change Your Potencia Contratada

Contact your comercializadora (your electricity supplier) — not the distribuidora. Potencia changes are a commercial arrangement with your supplier, not a network infrastructure change. The distribuidora (E-Distribución for most of Costa del Sol) implements the change once instructed by your supplier.

Reducing Potencia: Free

Reducing your contracted potencia costs nothing. You can do it by phone, online, or in writing to your supplier. The change is implemented within 1–2 billing cycles (typically within a month).

Before reducing, model your actual peak simultaneous demand carefully. The typical mistake is reducing based on average usage, then discovering that occasional peak demand — particularly in summer — exceeds the lower level. If you reduce and then need to go back up, increasing costs money (see below).

A useful strategy: if you’re unsure, try reducing by one step (e.g., from 5.75kW to 4.6kW) and monitor for a few months before reducing further.

Increasing Potencia: Costs Vary

Increasing your contracted potencia involves:

1. Administrative fee: Most suppliers charge €15–20 for processing the change
2. ICP recalibration or replacement: If your property has a mechanical ICP, an electrician must visit to adjust or replace it — typically €50–100
3. No electrician needed if your property has a digital smart meter — the distribuidora reconfigures it remotely

If you are currently on a contract with no mechanical ICP (modern property, smart meter), increasing potencia is generally simple: call your supplier, pay the small administrative fee, and the change happens automatically within a few weeks.

Seasonal Changes

You can change potencia as often as you need to — but most suppliers allow two free changes per year, with further changes potentially incurring an administrative fee. Some suppliers lock changes to once per year without charge. Check your contract terms.

A viable strategy for properties that only need high potencia in summer:

• Increase to higher potencia in April or May (before summer heat kicks in)
• Reduce back in October or November
• This uses both free annual changes in a sensible way

Alternatively, the dual P1/P2 potencia setting may allow you to handle seasonal variation without changing your contracted levels — by having a P1 level sized for summer and using P2 for the quieter overnight period year-round.

Changing Suppliers vs Changing Potencia

If you switch electricity suppliers, your contracted potencia carries over — the new supplier takes over the same supply point details. You can also change potencia at the same time as switching. See how switching electricity suppliers works in Spain for the full process.

How to Check Your Current Potencia

Three ways:

On Your Bill

Your electricity bill lists “Potencia contratada” or “Potencia en P1” and “Potencia en P2” in kW. The bill also shows the amount charged for this capacity (the término de potencia). If you see two separate lines for P1 and P2 potencia, you’re already using dual settings under 2.0TD.

E-Distribución Customer Area

For properties in Endesa’s distribution network (virtually all of Málaga province), you can access your supply point data at edistribucion.com. You’ll need to register using your CUPS code (on your bill) and your NIE or NIF. The customer area shows your contracted potencia, your meter type, and your consumption history by 15-minute intervals — useful for understanding your actual demand patterns before deciding whether to change your potencia level.

Call Your Supplier

Your supplier’s customer service line can confirm your current contracted potencia over the phone. Have your CUPS code and NIE ready.

The Costa del Sol Summer Sizing Mistake

This is the single most common potencia problem among expats who move to southern Spain. The sequence goes like this:

1. Move in during October, November, or December. Set up electricity contract. Everything works fine on 3.45kW or 4.6kW — the weather is mild, AC is off, you’re not running the pool pump yet.
2. June arrives. Temperature hits 35°C. AC goes on for the first time. Within a week, the ICP is tripping regularly — usually when you run the oven, or when someone boils the kettle while the AC is on.
3. Readers have reported this took them multiple trips to call their supplier, confusion about why the ‘electricity keeps going off,’ and delays because they initially thought it was a fault with the property.

The solution is straightforward: when you set up your contract, estimate your peak summer demand including AC — not your winter average. If you don’t know what AC you have or plan to install, size at least 1.0–1.5kW higher than your winter estimate.

For more on managing summer electricity costs on the Costa del Sol, see our guide on why your August electricity bill is so high and what to do about it.

Remote Workers: Special Considerations

Remote work changes your demand profile significantly. An occupied home during business hours has consistently higher consumption than a home that’s empty during the day. The 2.0TD tariff’s P1/P2 split works against remote workers in one sense (you’re consuming during the more expensive P1 hours), but the dual potencia option is particularly useful:

• Set P1 potencia to match your active daytime demand: multiple screens, AC, cooking, video calls
• Set P2 potencia lower for overnight: fridge, router, phone charging

For remote workers who are concerned about both cost and reliability, see our guide on electricity contracts for remote workers in Spain, which covers PVPC vs fixed-rate choices for daytime-heavy usage patterns.

Potencia and the Bono Social

If you are applying for or receiving Spain’s bono social electricity discount, note that contracted potencia must be 10kW or below to be eligible. This is not usually a constraint for domestic properties — but if you have an unusually high potencia contract from a previous tenant or for a specific use, check before applying. See our guide on the bono social in Spain for full eligibility details.

FAQ

Can I have a different potencia from my neighbour in the same building?

Yes. Each apartment or dwelling has its own supply point (CUPS) and its own contracted potencia. There is no shared limit across the building — the communal areas have their own separate supply. Your individual potencia is entirely independent of what your neighbours have contracted.

What happens if I temporarily need more power — e.g., a construction project?

For short-term construction or renovation work that requires higher power (power tools, concrete mixers, etc.), you can request a temporary increase from your supplier. Some suppliers handle this with a temporary contract modification; others suggest an independent connection for the construction period. For very high-power construction requirements, a separate temporary electrical supply is often more practical. Your electrician handling the renovation can advise.

Does reducing potencia affect my electricity cost in other ways?

Reducing potencia lowers your fixed monthly standing charge, which is always a saving. It does not affect your per-kWh energy rate — those are determined by your tariff type (PVPC vs fixed-market) and time of use, not by your contracted potencia. If you reduce potencia below what you actually need and the ICP trips regularly, the practical cost is inconvenience, not a higher bill — but it may push you to increase it again, which costs the administrative fee.

My potencia is 5.75kW but the breaker keeps tripping. Is my potencia wrong or is there a fault?

First, add up what was running when it tripped. If simultaneous demand could have exceeded 5.75kW, potencia is the issue. If the total should be well below 5.75kW and it’s still tripping, there may be a fault — either with the ICP itself (which can fail mechanically), or with a specific circuit. Call your distributor (E-Distribución: 900 503 051) for a fault check. Do not call your supplier for this — it is a network/meter issue, handled by the distribuidora.

Can I check my actual peak demand before deciding whether to increase potencia?

Yes, and this is the best approach. Log in to your E-Distribución account (edistribucion.com) and view your 15-minute interval consumption data. You can see not just kWh used but demand patterns — this shows you when your consumption spikes and by how much. If your peak 15-minute intervals are consistently at or near your contracted potencia, increasing by one step is justified. If peaks are well below, you may be fine or could even reduce.

I’m on a free-market tariff. Can I still change my potencia?

Yes. Potencia changes apply regardless of whether you’re on PVPC or a free-market tariff. Contact your current supplier to request the change. The process, costs, and timelines are the same. Note that some free-market tariffs are structured around specific potencia levels — check whether changing potencia triggers a contract change for your tariff.

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Related guides:

• Switching electricity supplier in Spain: what to expect
• How to read your Spanish electricity bill
• Electricity contracts for remote workers in Spain
• Why your August electricity bill is so high
• Complete guide to electricity in Spain for expats

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