A thunderstorm rolls through, the power drops, and when it returns the router refuses to boot. That scenario sits at the intersection of three distinct layers of defence that are routinely confused: the hardware you place between the wall socket and your devices, the coverage your home insurance policy provides, and the compensation you can demand from your electricity distributor. Getting them straight is the difference between a minor inconvenience and a dead workstation.
- Three different tools: A power strip only adds sockets, a surge protector diverts voltage spikes, and a UPS keeps current flowing from a battery during an outage.
- Joules are consumable: Every absorbed spike degrades the protective circuit, so models with an indicator light or automatic shutdown are worth the premium.
- VA is not watts: A 1,000 VA UPS cannot deliver 1,000 W if its power factor is 0.6, so always check both figures against your load.
- Claims have a clock: Under Spain’s new supply regulation, distributors must answer complaints within 15 working days.
Power Strip, Surge Protector, UPS: Three Different Jobs
A standard power strip does nothing more than multiply outlets. A surge protector intercepts voltage peaks and shunts them away before they reach your equipment. A UPS goes further, maintaining current through a battery when the grid fails. Manufacturer Belkin stresses in its surge protection guidance that strips and protectors are easily mistaken for one another because they look nearly identical, yet they perform entirely different functions.
Spikes do not always arrive from outside. Belkin separates external surges, caused by lightning or a fault on the distribution network, from internal ones generated inside your own installation when a motor-driven appliance such as an air conditioner or refrigerator shuts down abruptly.
Reading Joule Ratings on a Surge Protector
The joule figure describes how much surge energy a protector can absorb before its protective circuit stops working. Higher numbers mean greater protection and a longer service life. Eaton’s buying guide offers a rough scale: 400–600 J for basic protection of lamps and small appliances, 600–1,000 J for televisions and entertainment equipment, and above 1,000 J for computers and networking gear.
Two details matter more than the headline number. First, protectors wear out: each absorbed spike degrades the component, so Eaton recommends models with an indicator light or alarm that signals when protection has failed, or with automatic shutdown, since without it a protector may keep supplying power while offering no protection at all. Belkin advises replacing the unit after a significant spike such as a storm, and in any case every two years. Second, spikes also travel through data cables, and some protectors include ports for network, coaxial or telephone lines, which is useful for a router receiving the line from outside. Belkin adds a further warning: never daisy-chain one protector into another strip.
When a UPS Earns Its Place, and What VA Really Means
A UPS justifies its cost when the concern is not just a spike but an outage: losing unsaved work, a NAS shutting down mid-write, or losing internet during a brief blackout. A television is fine behind a protector; a work computer, router and network drive benefit from battery backup.
UPS capacity is quoted in two figures, as Schneider Electric, owner of the APC brand, explains. Watts (W) represent the real power drawn by connected devices. Volt-amperes (VA) represent apparent power, the product of voltage and current, and in electronics the VA figure is always equal to or greater than the wattage. The power factor links the two, typically 0.8 or 0.9. The practical rule: add up the wattage of everything you plan to connect and confirm you exceed neither the watt nor the VA rating of the UPS. Runtime depends on the model and the load, so verify it on the manufacturer’s datasheet before assuming you can keep working through an outage.
What to Do When a Spike Destroys a Device
Complain in writing to your supplier first, preserve the evidence, and review your home insurance policy: these routes are compatible rather than mutually exclusive.
Spanish regulation Royal Decree 1955/2000 sets the voltage reaching a home at no more than ±7% of the declared level (Article 104) and recognises that a consumer harmed by a service quality failure may claim damages through civil proceedings (Article 105.7). The distributor is exempt in cases of force majeure or third-party action, provided it proves them, but the regulation clarifies that failures stemming from inadequate electrical installations and weather phenomena normal to the area do not count as force majeure.
Royal Decree 88/2026, of 11 February, which approves the new supply regulation, obliges retailers and distributors to run a free customer service, issue a complaint reference number and respond within a maximum of 15 working days. Where the retailer contracts network access on your behalf, it must represent you, on request, in service quality complaints. If no reply arrives or the answer is unsatisfactory, consumers can turn to the Consumer Arbitration Boards, an accredited alternative dispute resolution entity, or their regional authority’s procedures.
The OCU recommends gathering receipts and invoices for the affected devices, documents proving the damage, photos and video, and filing the complaint in writing. A technical report from a repair service stating that the fault is consistent with a surge considerably strengthens the case.
Home insurance typically covers electrical damage under multi-risk policies, but with conditions. According to Endesa’s guidance on insurance and electrical faults, such damage is the third most common cause of household claims, and insurers commonly request an expert report, apply an excess, cover only devices above a certain value, or indemnify at the device’s actual value at the time of the incident rather than replacement cost. Read that clause before you need it.
The most cost-effective protection remains the least glamorous: a protector with a solid joule rating, an indicator light and automatic shutdown for the computer and router, plus a small UPS only where an outage would cost you data. Claims against the distributor exist for genuine network failures, but they demand evidence and patience, and they will not cover spikes generated inside your own home. Prevention first, policy review second, and the argument with the utility last.