If I activate the Price Guardian, does anything else change on my bill?

No. The Price Guardian only fixes the price of the energy you consume. Everything else continues to work exactly the same:

• Contracted capacity is billed at the regulated cost price, with no margin for Chippio.
• Taxes, network fees, and the meter rental are costs regulated by law and remain unchanged.
• The Tarifa Transparente fee (€3.90/month) continues to apply, prorated by the number of days in the cycle.
• The Price Guardian fee (€3.90/month) is added for the full month, without proration.