Relays in wall boxes and panels
We fit relays behind switches, in sockets, in junction boxes or on a DIN rail in the panel. We check for a neutral, the load on the circuit and whether there is enough room for the relay to stay cool.
Sonoff · Shelly · Tuya · Ajax
Smart relays: installation, replacement and setup
Buying a smart relay is easy — every marketplace sells them. Finding someone to install it properly is harder: someone who checks whether there is a neutral wire in the wall box, keeps the relay within its load rating and sets it up so it doesn't keep dropping off Wi-Fi. We install Sonoff, Shelly, Tuya (Smart Life) and Ajax LightCore relays, replace faulty ones, migrate scenes and fix systems set up by other installers.
What we do
No-neutral relays
In older buildings the switch often has only a live wire. For these cases we choose relays that work without a neutral (Zigbee models from Sonoff, Shelly, Ajax) or run a neutral if it can be done without damaging the finish.
Replacing relays fitted by others
Relay burnt out, freezing or won't connect? We find the cause first — overload, weak Wi-Fi, wrong wiring — and replace the device only if it is actually faulty.
Setup and scenes
We connect relays to eWeLink, Shelly, Smart Life or Ajax and set up schedules, scenes and voice control via Google Assistant, Alexa or Apple Home where the model supports it.
One system instead of several apps
If your home has relays from different brands, we bring them together in Home Assistant or a single app, so you don't need three apps on your phone.
Reliable Wi-Fi and Zigbee
Half of all complaints about 'glitchy' relays come down to weak signal. We check Wi-Fi coverage and, if needed, add an access point or a Zigbee gateway closer to the devices.
How we work
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01
Call or message
Tell us what you have and what isn't working. A photo of the wall box or panel helps us understand what will be needed.
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02
Visit and inspection
An engineer checks the wiring, load and signal, suggests a relay model for your situation and gives you a price before any work starts.
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03
Installation and setup
We install the relay, connect it to the app, set up scenes and show you how to use them.
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04
Warranty
Our work comes with a warranty. If a relay stops working because of the installation, we fix it.
Pricing
Prices are for labour only, relays not included. You can buy the relays yourself or order them from us. We confirm the exact total after the inspection: it depends on the number of relays, whether there is a neutral and where they are mounted.
| Smart relay installation in a wall box | pc | from 650 ₴ |
| Relay installation on a DIN rail | pc | from 800 ₴ |
| Faulty relay replacement with settings migration | pc | from 750 ₴ |
| Smart switch in place of a regular one | pc | from 700 ₴ |
| Scene or automation setup | scene | from 1,500 ₴ |
| Zigbee gateway installation and setup | pc | from 1,200 ₴ |
| Engineer visit in Kyiv (credited toward the work) | visit | from 1,500 ₴ |
| Engineer visit in Kyiv region (credited toward the work) | visit | from 2,000 ₴ |
Smart relay FAQ
Which relay should I choose — Sonoff, Shelly or Tuya?
Sonoff is an affordable, widely used option with the eWeLink app. Shelly costs more but works locally, without the cloud, and most models measure power use. Tuya (Smart Life) relays are the cheapest, but quality varies a lot between manufacturers. If you have an Ajax alarm system, Ajax LightCore relays are the natural choice. We pick the model to suit your wiring and needs.
There is no neutral in the wall box. Can I still have a smart relay?
Yes. Some relays work without a neutral — mostly Zigbee models, which need a gateway. Some light fittings also need a small bypass capacitor so the lamp doesn't flicker. We'll check which option fits during the visit.
My relay keeps going offline. What's wrong?
Usually it isn't the relay but weak Wi-Fi: a relay inside a metal panel or behind a concrete wall struggles to get a signal. Another cause is overheating from a load above its rating. We find the cause first and only replace the relay if it is actually faulty.
Can I call you out to replace just one relay?
Yes, we take small jobs too. A visit costs from 1,500 ₴ in Kyiv and from 2,000 ₴ in the region, credited toward the work if you go ahead.
Will my scenes survive a relay replacement?
If the new relay is the same brand, scenes can usually be moved over or quickly restored. When switching brands, we set the scenes up again and check that everything works as before.
Can I control relays by voice and without internet?
By voice — via Google Assistant, Alexa or Apple Home if the model supports it. Without internet — relays with local control: Shelly, Zigbee relays through a gateway, or any devices in Home Assistant.
Other services
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Whole-home Wi-Fi for houses and townhouses
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Solar and backup power for your home
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Turnkey backup power
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Turnkey smart home
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Maintenance for your home's engineering systems
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Turnkey Home Assistant setup
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We work across the Kyiv region
Same rates for the work and the same warranty as in Kyiv. A site visit in the region starts at 2,000 ₴ and is credited toward the job.
Contact
Tell us what needs doing and we'll get back to you during business hours
Send a request
Tell us about the job in a short form — from replacing a smart relay to a full rewire. We'll send a preliminary estimate within a day.