Hi,
I use an RFLink 433Mhz gateway which works superb with lots of stuff including these cheap remote power sockets https://www.clasohlson.com/uk/Nexa-Remote-Switch-Set-3-pack/18-2650.
However, they have a max load of 1500w which isn’t enough to support switching a heater I’d like to control.
Does anyone know of any 433Mhz remote power switches that support 2kW+?
Thanks.
If you want to be safe instead of trusting the cheap Chinese relais in remote plugs, wire in a small box the remote plug of your choice with a commercial relais or contactor from a reputable brand.
Yeah, thanks. I’ve had really poor (and dangerous) experiences with cheap Chinese stuff off ebay so stick to stuff I trust (like the Nexa stuff).
I’m confident with electrical wiring, but I’m not sure how to wire in a decent relay or which ones are any good.
I don’t know what’s your local market, and in this forum I’m learning that electrical standards and practices in the world are very different.
Here in Italy we have DIN rail switchboards, and reputable brands are BTicino, Schneider electrics, Gewiss, ABB. Every brand makes switchboard relays (like this ) using low power mains voltage to switch high power mains voltage.
Another benefit of this setup is that usually smart plugs only break one of the wires (line or neutral), while with a DPST relay you can break both line and neutral for additional safety.
Cabling should be easy, the relay command is connected like any other load to the smart plug, and the relay contact are cabled like a simple switch to the appliance.
The Status remote socket runs to 2900w and it has a switch on the front which the nexa’s don’t 
(I have both btw)
@keithh666 I had some Aukey plugs very similar to yours. When 4 out of 6 broke, I opened to try a repair but found inside they were really low quality. I would never trust to run 12A through that for a long time.
Then you have to account for different line voltages: the Status plugs are rated 2.900W@220v, but the real rating is 13A, or 1.500W@110v like the ones used by Bob.
Well I have not opened my Status’s up but the back clearly states they are rated 13A 2900W @ 240V and I don’t believe they would be able to sell them in the UK unless they were fully compliant with our electrical codes. Mine run everything from a 2kw fire to lights to tv’s, amps etc. So far (touch wood) I’ve not a single problem with them unlike for instance Zwave devices which 3 have gone up in smoke out of 6 bought so far 
This is the inside of the Aukey switch, rated 16A. (sorry for the shitty photo)
The trace going from the relay to the output wire is 4mm, while it should be at least 7mm.
As a comparison, the traces in Sonoffs are fully covered with solder that greatly improves power transmission (think about cross-section):
I’m not going to debate with you except to say buyer beware :), since I can’t get inside mine as they use a special screw head which I don’t have a tool for. As regard the Sonoffs I’ve had one running (the sonoff pow) at 13A for 4 months and it finally set fire to it’s self about 3 weeks ago so I would not advise using them at full capacity for any length of time
Thanks for all the info. If I were permanently wiring it in, I’d look at a relay in a box, but since its likely to move, I think I’ll go for the Status remote sockets - the load I’m looking at is around 2.2kW, so should be OK. They seems to get good reviews.
No debate, just a useful opinion exchange 
Yes, mine too have those stupid safety screws. I had to dremel a slot in a screwdriver to open them. I trashed the broken circuit and wired a Sonoff Basic inside, it fitted just right, and that solved not having original Sonoffs with Italian plugs.
I’m a bit worried that a Sonoff gave up the magic smoke to you… I hope it wasn’t dangerous. Personally I distrust any “smart” plug for everything over 3-4 Amps, and here on the forum i always advice to use a commercial relay for anything over that current, or a contactor for inductive loads like water pumps. Fire is a great risk I don’t want to take.
Luckily I was in at the time as I’m currently unemployed, but I hate to think what would have happened if I was at work all day as would normally be the case :(, also the sonoff pow’s are rated at 16A, so I thought they would be safe at 13A but I cannot recommend them, at least not running 13A or more 24/7.
