How reliable have you found Shelly devices to be?
I have never used one so no experience with one at all. I recall reading somewhere that a user heavily into Home Automation and IOT said he was moving away from Shelly devices because he has had too many failures.
Wondering what others have experienced using Shelly devices.?
90%+ of my devices are Shelly Gen1 devices.
Of these, I had 1 failure. I think it was draw of the luck.. Because I replaced it with the same device that has then been running years. I think the Shelly Gen1 devices I installed in 2020. I have over 20 of them on my wifi.
The gen2/3 devices I have, the one struggles with wifi which is annoying but not at a critical point. So been ignoring it.
The gen4 devices are AMAZING. I had a gen1 device having wifi issues, so replaced it with a gen4 version to rather use zigbee. The zigbee works solid, which I expected since my zigbee network is solid stable. That said, it runs wifi at the same time and that also runs much better. Same location, different device. So massive improvement in that area. Also, it can act as a wifi extender. how cool is that. On top of that, you can choose to run it as matter or zigbee or wifi. Choice is really yours.
I like shelly devices, 99% of the time, they just work™. Nothing beats them.
Also have Sonoff devices, where the sonoffs had more failures between less devices.
If I had a choice, I will never again put a Sonoff in. Shelly however, any day and every day again.
That said, I run the shelly devices where I know they are not underpowered. I will not put them on my geyser.
For a pool pump, make sure the pump rating x7 is not more than the shelly device. Dont put a 10A device there, its stupid. 16A might work IF the pump is not rated too high. But you have to double check.
Also, the connectors on the gen4 devices seems to be much better than those on the gen1 devices. I think shelly really improved their quality.
great feed back ! Thanks
Will probably buy a few Shelly devices to mess with. My fear is going FAR down that rabbit hole and spend a whole lot of time/resource’s only to find out much later they are not so “tough” or reliable.
Maybe it was SONOFF devices that this other guy was getting out of because he had too many failures with them? IDK.
sonoff devices are horrible.
if you dont flash firmware, you need to go via their ewelink app first before adding in home assistant.
flashing firmware is not fun even for capable people, most other users just wont
Shelly if you do want to flash firmware, its super easy OTA. However, I feel they are best on their original firmware. Dont need cloud at all, can use direct in Home Assistant.
now works with zigbee or matter hub on gen4, your choice
I would like to see the reason anyone would want to move from Shelly to Sonoff, other than maybe price. For me, the Shelly devices are on the expensive side now, 2020 they were much cheaper.
I’ve used a plethora of smart switches on my HA install ranging from Sonoff (all flashed with Tasmota), ESPhome, Shelly, Aqara, Ring, Tuya, TP-Link etc… and Shelly has definitely come a long way and probably my favourite now out of those I’ve mentioned, their software is pretty good but you probably won’t ever touch it if you’re using it with HA, I do find their stuff a bit pricey though.
There is a lot more dev work being done on Shelly and HA integration which is worth some extra points in my book.
Probably worth adding that best value for money route would be building your own devices with ESP boards if you’re up to that but I’ve gotten to the point now largely because of lack of time that I just want something off the shelf.
I did, Shelly Gen1 on the geyser.
Had one Gen1 one fail me, Loadshedding before I had a Tripconnect.
A 2nd Gen1 I blew one up on my desk … did not see one wire strand sticking out - 220v can be vicious.
Neither is a reflection on Shelly.
Victron Cerbo NodRED just keeps switching the Shelly on/off day after day for years now.
… ok, ok, I’ll be honest … Hager 20A relay does the power, Shelly just triggers the 20A relay. 
I’ve worked with some of the Shelly people on a project once (it never went anywhere, but I got a glimpse). Their hardware is excellent, expensive, but excellent. They are a Bulgarian company (Alterco) based in Sophia.