# \[APP\] Shelly - Smart solutions for every home and office **URL:** \ **Category:** Apps\ **Tags:** app, official, homey, homey-pro, homey-cloud\ **Created:** [August 28, 2018, 8:54pm UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765 "2018-08-28T20:54:43Z")\ **Posts on this page:** 20\ **Page:** 47
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 26, 2020, 7:13am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/927 "2020-07-26T07:13:06Z")
question about shelly EM. Are the clamps accurate? Is it possible to connect directly to a group, withputthe clamps that is? ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [July 26, 2020, 7:25am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/928 "2020-07-26T07:25:53Z")
> [@Otter](#): > > question about shelly EM. Are the clamps accurate? In [the Shelly forum](https://www.shelly-support.eu/forum/index.php?thread/1818-accuracy-of-shelly-em-devices-messgenauigkeit-von-shelly-em/&postID=23264#post23264) it’s stated that the accuracy is about 98%. The clamps are calibrated (I guess the device is calibrated with the particular clamps it’s shipped with) and you can’t use other clamps. > [@](#): > > Is it possible to connect directly to a group, withputthe clamps that is? Assuming you mean “without”: no. The clamps are for measuring loads up to 120A and 50A, _way_ too much for the device’s relay to handle. ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 26, 2020, 8:04am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/929 "2020-07-26T08:04:41Z")
Thanks! 98% is not that good… I am looking for a good system to measure energyoutput from my groups. I have bought some 1PM but to put 10 of them with wago’s in my fusebox is not the way to go. ---
**Author:** ![peltsi51](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peltsi51/32/12564_2.png) [@peltsi51](https://community.homey.app/u/peltsi51)\ **Post date:** [July 26, 2020, 8:22am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/930 "2020-07-26T08:22:02Z")
Can I ask for what purpose do you need such good accuracy? ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 26, 2020, 8:51am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/931 "2020-07-26T08:51:27Z")
23 solar panels, an EV, heatpump, induction etc. On 10.000 kWh 2% is not going to cut it ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [July 26, 2020, 9:48am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/932 "2020-07-26T09:48:56Z")
Why not? An regular consumer smart meter also has an accuracy of 2%, I think that if you want (significant) better accuracy you’ll have to venture into the realm of industrial or scientific measurement devices that require regular calibration. ---
**Author:** ![M\_a\_r\_c\_o](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/m_a_r_c_o/32/146_2.png) [@M\_a\_r\_c\_o](https://community.homey.app/u/M_a_r_c_o)\ **Post date:** [July 26, 2020, 12:08pm UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/933 "2020-07-26T12:08:56Z")
Then you need a 3 phase unit. Or a 3 phase kWh meter with Modbus and a Modbus to Ethernet and the Modbus app on the Homey. ---
**Author:** ![peltsi51](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peltsi51/32/12564_2.png) [@peltsi51](https://community.homey.app/u/peltsi51)\ **Post date:** [July 26, 2020, 6:10pm UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/934 "2020-07-26T18:10:01Z")
Okey you want to use it on these devices but what are you planning to do with the measurement? If the measurement is used for billing I understand that the 2% isn’t enough, but I can’t figure any other use case that you could need more accurate measurement. ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [July 26, 2020, 6:50pm UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/935 "2020-07-26T18:50:22Z")
> [@peltsi51](#): > > If the measurement is used for billing I understand that the 2% isn’t enough Consumer smart meters in NL have an accuracy of 2%, and those are used for billing 😛 ---
**Author:** ![peltsi51](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/peltsi51/32/12564_2.png) [@peltsi51](https://community.homey.app/u/peltsi51)\ **Post date:** [July 26, 2020, 7:25pm UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/936 "2020-07-26T19:25:14Z")
😃 Are you sure? In Finland the accuracy is typically 0,2% for instrument transformers and around 0,2% for the measurement device so total error could be around 0,4%. Don’t know the actual requirements but these are usually used. EDIT: You are right the requirement is also 2% in Finland 😊, but it those accuracies above are commonly used. ---
**Author:** ![widameista](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/widameista/32/23333_2.png) [@widameista](https://community.homey.app/u/widameista)\ **Post date:** [July 27, 2020, 5:00am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/937 "2020-07-27T05:00:45Z")
Have a few Plug S. Since a few days 2 of them got unreachable from homey. They have fixed IP, latest firmware and work without problem from the native Shelly app. I deleted one Plug S in Homey. When I add it again it is shown but then I get the message host unreachable. No idea how to get the plug S back to Homey? Please advice. ![image](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/a/7/a7a2335c40d50e65f16de2b68a50d79f34f8142b.jpeg) ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 27, 2020, 6:01am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/938 "2020-07-27T06:01:36Z")
My house is self sustainable, for insurance purposes I need to know what my own usage is and what the system installed is using. ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 27, 2020, 6:02am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/939 "2020-07-27T06:02:13Z")
Signal lost? ---
**Author:** ![Phuturist](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/phuturist/32/49_2.png) [@Phuturist](https://community.homey.app/u/Phuturist)\ **Post date:** [July 27, 2020, 6:06am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/940 "2020-07-27T06:06:18Z")
As the message indicates Homey can not reach that IP address. I see more and more issues with Homey’s networking capabilities. There is not much I can do about it, as far as I can tell this is not something I can fix within my app. It would be interesting to see if others apps also have issues connecting to that IP. You could for instance try to make a flow with the logica "make a webrequest” card to [http://192.168.0.72/status](http://192.168.0.72/status) and see if that also fails. If so, it’s for sure a Homey issue. ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 27, 2020, 6:25am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/941 "2020-07-27T06:25:52Z")
Hmm, thanks for enlighting me! So I’m just nitpicking 😉 I’ll accept the 2% then. Still some clamps are not my first choice. The 4pro does the job but is only 10A. There are not much (cheap) options left? ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [July 27, 2020, 8:55am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/942 "2020-07-27T08:55:48Z")
> [@Otter](#): > > The 4pro does the job but is only 10A. I don’t think the 4PRO supports power measurements. ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 27, 2020, 9:08am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/943 "2020-07-27T09:08:03Z")
Yes it does ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [July 27, 2020, 9:40am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/944 "2020-07-27T09:40:46Z")
I guess I’m looking at a different 4PRO than you are then 😛 ---
**Author:** ![Otter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/otter/32/11467_2.png) [@Otter](https://community.homey.app/u/Otter)\ **Post date:** [July 27, 2020, 10:04am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/945 "2020-07-27T10:04:59Z")
[https://shelly.cloud/knowledge-base/devices/shelly-4pro/](https://shelly.cloud/knowledge-base/devices/shelly-4pro/) ---
**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\ **Post date:** [July 27, 2020, 10:48am UTC](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765/946 "2020-07-27T10:48:20Z")
Oh duh, I was looking at the Sonoff 4PRO 😂 [Previous page](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765.md?page=46) [Next page](https://community.homey.app/t/app-shelly-smart-solutions-for-every-home-and-office/765.md?page=48)