Cyberfruits Posted February 19 Share Posted February 19 Hi Has anybody used these Wifi energy metering monitoring clamps before? How accurate are they? Are they easy to install? I like to monitor the power consumption of my heat pump. Thanks Link to comment Share on other sites More sharing options...
TonyT Posted February 19 Share Posted February 19 I use a Shelly version, for power and another for flow/return/outside air nonissues 2+ years in 1 Link to comment Share on other sites More sharing options...
Cyberfruits Posted February 19 Author Share Posted February 19 1 hour ago, TonyT said: I use a Shelly version, for power and another for flow/return/outside air nonissues 2+ years in Similar clamp system i believe, Do you find it accurate enough? Link to comment Share on other sites More sharing options...
SteamyTea Posted February 19 Share Posted February 19 As it is a current clamp and your heap pump is an induction load, it will not be that accurate. Link to comment Share on other sites More sharing options...
sharpener Posted February 19 Share Posted February 19 (edited) 2 hours ago, SteamyTea said: As it is a current clamp and your heap pump is an induction load, it will not be that accurate. Good point. If it is an inverter drive then who knows what the waveform and power factor will be like? OP would be well advised to check that the proposed device measures true rms power not just infer it from the current, the spec here does not say. Fortunately it appears to have an AC voltage connection so at least there is that possibility. Edited February 19 by sharpener Link to comment Share on other sites More sharing options...
Alan Ambrose Posted February 19 Share Posted February 19 The fact that neither Corui nor Shelley specify accuracy suggests they are not that accurate. Suggest better than 5%? But given that we're often interested in the trend or difference rather than the absolute value it may not matter too much. Link to comment Share on other sites More sharing options...
TonyT Posted February 19 Share Posted February 19 https://shellystore.co.uk/product/shelly-pro-em-50a/ accuracy info if it worries you that much fit an old school meter. Link to comment Share on other sites More sharing options...
SteamyTea Posted February 20 Share Posted February 20 15 hours ago, TonyT said: if it worries you that much fit an old school meter. Or make one, it has WiFi. Link to comment Share on other sites More sharing options...
TonyT Posted February 20 Share Posted February 20 Making anything like that is to much of a faff, when you can buy something out the box and install dont get me wrong ideal tinkering project, but I don’t want the home brew look on my installs Link to comment Share on other sites More sharing options...
MortarThePoint Posted February 20 Share Posted February 20 (edited) Does it really need to be WiFi or do you just want to be able to check. If the later, my ASHP installation came with one of these: https://www.amazon.co.uk/gp/product/B08X6J865C/ Alternatively, I would love someone braver than me to try out one of these: https://www.aliexpress.com/item/1005004158545611.html https://www.aliexpress.us/item/1005005184859497.html Important to not that the first one says in its text that: "Both models have NO overcurrent protection, can not set current ,voltage in APP." The second offers current limiting, but that looks to be via software so not to be relied upon I'd say. Anyway, you need RCBO rather than just MCB function nowadays. Easy to put downstream of an RCBO. Both claim to be CE marked. Form you own risk assessment 🙂 Available as Zigbee too. Edited February 20 by MortarThePoint Link to comment Share on other sites More sharing options...
Alan Ambrose Posted February 20 Share Posted February 20 How to identify a Conformité Européenne mark vs a China Export mark https://starfishmedical.com/blog/conformite-europeenne-mark-vs-a-china-export-mar Link to comment Share on other sites More sharing options...
MortarThePoint Posted February 20 Share Posted February 20 17 minutes ago, Alan Ambrose said: How to identify a Conformité Européenne mark vs a China Export mark https://starfishmedical.com/blog/conformite-europeenne-mark-vs-a-china-export-mar A fair point, but it is the CE mark not China Export one and they even include their certificate: Link to comment Share on other sites More sharing options...
dpmiller Posted February 20 Share Posted February 20 I'm running our ASHP off one of the Tuya MCBs and it reports nicely to SmartLife. Seems as accurate as the cheapo din-rail meter it replaced, and runs cooler too. 1 Link to comment Share on other sites More sharing options...
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