FAQs

All our installations are guaranteed by law and covered by our Civil Liability Insurance. As Authorized Installers, we sign off on and take responsibility for every job, ensuring strict compliance with the Low Voltage Electrotechnical Regulations (REBT).

 Not always, but a thorough inspection is vital. If the wiring is very old (cloth-covered or lacking earthing), it is dangerous and consumes more energy. We perform an initial diagnosis to tell you which parts can be kept and which are urgent upgrades for your safety.

Yes. We understand that a power outage in a business or a short circuit at home cannot wait. We have a specific rate for urgent interventions outside business hours or on holidays to solve the problem as soon as possible.

This could be due to an earth fault in an appliance, moisture in the wiring, or a defective breaker. We do not recommend blocking it or forcing it back up. Call us, and we will use diagnostic equipment to locate the exact leak without the need for unnecessary building work.

Yes, and it is easier than it seems. According to current regulations, you only need to inform the Community of Owners; you do not need their approval in a meeting. We handle the installation (wiring from your meter or a new line) and present the official communication to the property administrator.

Absolutely. The return on investment is usually less than 2 years. Besides lowering the lighting portion of your electricity bill by up to 60%, LEDs generate less heat (saving on air conditioning) and have a much longer lifespan, which reduces maintenance costs.

We plan interventions to minimize the impact on your activity. For preventive maintenance or renovations, we can coordinate during off-peak hours or perform partial shutdowns by zones so that your critical equipment (servers, fridges, tills) keeps running.

Yes, it is very likely. This is called "galvanic corrosion." It happens when you connect the boat to the port's shore power ground without adequate protection. at S4 Power, we diagnose the leak and install a Galvanic Isolator or an Isolation Transformer to protect your boat's metals and extend the life of your anodes.

Absolutely not. Regulations (ITC-BT-42) require specific cables with high resistance to water and oil (H07RN-F type) and industrial connectors (CETAC type). Using domestic extension cords is the number one cause of fires in marinas. We manufacture custom-made, certified shore power cables for your safety.

An electrical refit isn't just about aesthetics; it is about safety and autonomy. We replace old wiring (often corroded by salt) with tinned marine-grade cable, install LED lighting to reduce battery consumption, and mount modern protection panels with RCDs that prevent the dock pedestal breaker from tripping at the slightest issue.

Yes, we are specialists in onboard energy management. We correctly size cable sections so you don't have voltage drops in the fridge or the anchor windlass, and we install smart chargers and battery monitors so you always know exactly how much energy you have left before setting sail.

Absolutely. Although we work on the boat, we adhere to the strictest safety standards (Marine ISO and REBT for shore connection). We deliver the installation checked and ready to pass the Spanish Technical Boat Inspection (ITB) without problems.