Power Window

Compare tariffs with flexible electricity use.

PVPC comparison

Compare PVPC and electricity tariffs in Spain

A cheap advertised price does not always win on your bill. Compare PVPC with editable offers using monthly usage, EV charging, contracted power, and taxes.

PVPC

Flexible usage changes the result

If you can move EV charging, laundry, or cooling, PVPC can perform differently from a simple average. The comparator places flexible kWh into cheap hours.

Offers

Enter real prices

Copy energy prices, power terms, monthly fees, and whether taxes are included. This makes the estimate closer to the offer you are actually seeing.

Taxes

Fiscal territory matters

The app separates VAT, IGIC, or IPSI through editable presets. You can also adjust the electricity tax and the fixed social-bonus cost.

Ranking

Cost first, referrals second

If referral links are added, they should be labelled. The ranking should remain based on estimated cost, not commission.

How to compare

What to check before switching electricity tariff

A tariff is not decided only by the headline kWh price. For a real household, annual usage, contracted power, timing, taxes, added services, and flexible loads such as EV charging all matter.

Energy price

This is the most visible part of many offers, but it may be shown with or without taxes. PVPC changes by hour; a fixed tariff is usually more stable. The comparator keeps this input explicit.

Contracted power

Contracted power is paid even when you are not consuming energy at that moment. Moving a washing machine or EV session does not remove that fixed cost, so Power Window keeps it separate.

Services and lock-in

Some offers include maintenance, insurance, temporary discounts, or lock-in clauses. Before switching, check whether the promotional price applies for the full year or only for a few months.

Hourly profile

Two homes with the same monthly consumption can pay different bills if one uses energy in expensive hours and the other charges an EV or runs appliances in cheaper blocks.

Frequently asked questions

Comparing Spanish tariffs with PVPC

How can I compare PVPC with an electricity tariff?

Enter monthly usage, flexible usage, contracted power, and offer prices. The comparator estimates PVPC by moving flexible kWh into cheaper hours.

What is a fixed tariff compared with PVPC?

A fixed tariff simplifies the kWh price. PVPC changes by hour and can reward homes that shift flexible loads.

Is the cheapest advertised offer always best?

No. Review contract lock-in, extra services, prices with or without taxes, power terms, and whether your actual usage fits the offer structure.

More guides

Before choosing a tariff