Išmanūs namai už 2 000€ vs 20 000€: Ką pasirinkti? (Relės prieš PRO sistemą) Eltis LT

Summary

The video compares smart relays—such as Wi-Fi, Zigbee, or Bluetooth devices—with a professional wired smart-home system, primarily KNX. It focuses on installation, reliability, cost, and which option suits different homes.

Smart relays

Smart relays are compact devices added to a conventional 230 V electrical installation, often behind switches. They can control lights or other circuits and can be linked for automations.

They are relatively easy to add to an existing home, room by room, and some homeowners may install them themselves. However, they can be difficult to locate and replace later.

Professional systems such as KNX

KNX uses a dedicated wired data line and a panel for system equipment. Switch buttons and devices can be programmed individually, and control logic is distributed across devices.

A fault in one device generally affects only that device. However, a failed system power supply could disrupt the wider system unless redundancy is provided. Installation requires planning and specialist programming.

Connectivity and offline operation

Relays may depend on a strong Wi-Fi network, which can require upgraded networking equipment as the number of devices grows. Zigbee and Bluetooth mesh devices can relay signals through one another, but may need to be positioned to extend coverage.

The presenter says properly installed relays can still be controlled by physical buttons if internet access is lost. Internet access is mainly needed for some remote functions or automations.

Reliability and maintenance

The presenter reports that the relays they have used have generally worked for several years, while noting that electronics can fail and that replacing concealed relays can be inconvenient. A voltage surge is cited as an example that can damage multiple devices.

KNX is presented as a long-life option used in commercial buildings and designed for long-term service. The video mentions typical warranties of two to three years and a five-year warranty program for registered Jung equipment.

Cost

Relays are cheaper to start with and can be installed incrementally. The presenter estimates equipment for a relay-based setup at roughly €3,000–€4,000, depending on requirements. The total cost can rise once a home server, better networking, and future maintenance are included.

KNX costs more initially because it requires specialized equipment, switches, design, and professional commissioning. In a new build, however, it can reduce some conventional wiring and switch-installation costs. A well-documented professional system may also add value to the property. The video’s precise quoted upper price range for KNX is unclear in the subtitles.

Recommendation

Consider KNX early when designing or extensively rebuilding a home, especially if a long-term, professionally maintained system is the goal. For an existing home where rewiring is impractical, smart relays are usually the more practical way to add automation.

The presenter’s main advice is to choose the system during the planning stage rather than deciding after construction is complete.

Guide and analysis topics

1. How smart relays differ from a professional KNX system
2. Retrofitting smart-home functions into an existing installation
3. Internet loss, system reliability, and device failures
4. Upfront versus long-term costs
5. Choosing relays, a professional system, or a combination

Main speaker and sources

The video is presented by an unnamed Eltis LT representative. Systems and products mentioned include KNX, Wi-Fi, Zigbee, Bluetooth, Matter, and Jung equipment.