# Solar panel and smile p4 power shown wrong on the energy tab **URL:** \ **Category:** Questions & Help\ **Created:** [November 2, 2019, 11:42am UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122 "2019-11-02T11:42:30Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Edwin\_Biemond](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/edwin_biemond/32/72686_2.png) [@Edwin\_Biemond](https://community.homey.app/u/Edwin_Biemond)\ **Post date:** [November 2, 2019, 11:42am UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/1 "2019-11-02T11:42:30Z")
He, I added support for solar power generation and I think the total energy shown on this tab is not correct. It sums the smile and solar value together. In my case, smile it always the correct one (directly on the meter) and solar should be displayed separated in the graph. but at least not added as another consuming power source. ![Screenshot_2019-11-02-12-29-14](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/0/d/0dacef09ceb3351bbcaaab3adee38b147e5b88ca.jpeg) this is from the documentation Solar panels generate their own energy. Homey shows these devices in the outer ring in the _Energy_ tab. `/app.json` ```auto { "id": "my_driver", "class": "solarpanel", "capabilities": ["measure_power"] } ``` Homey will show this device separately in the UI. You should provide the _generated_ power as a positive value. When providing a negative value, e.g. `-13` watt, Homey assumes the solar panel is currently consuming instead of generating energy. ---
**Author:** ![Gruijter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gruijter/32/1973_2.png) [@Gruijter](https://community.homey.app/u/Gruijter)\ **Post date:** [November 2, 2019, 12:48pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/2 "2019-11-02T12:48:26Z")
Hi Edwin. You are misinterpreting the shown numbers. The outer thin ring shows your solar panel production (171w). The inner ring shows your total in-house usage. And that is 309w. The 309 comes for 138w from the grid (as shown by your P1 meter), and for 171w directly from your solar panels. So the shown numbers are good! Great app by the way, the Plugwise Smile 😘 ---
**Author:** ![Edwin\_Biemond](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/edwin_biemond/32/72686_2.png) [@Edwin\_Biemond](https://community.homey.app/u/Edwin_Biemond)\ **Post date:** [November 2, 2019, 3:36pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/3 "2019-11-02T15:36:36Z")
ok cool, that makes sense, I like to see a good sunny day where I am giving back to the net and still see . the internal power usage calculated by the solar and smile ---
**Author:** ![Edwin\_Biemond](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/edwin_biemond/32/72686_2.png) [@Edwin\_Biemond](https://community.homey.app/u/Edwin_Biemond)\ **Post date:** [November 28, 2019, 4:06pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/5 "2019-11-28T16:06:55Z")
in this case it is zeversolar but basically all solar apps can do this when they implement the following “class”: “solarpanel”, “capabilities”: [“measure\_power”] ---
**Author:** ![shadowz7](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/shadowz7/32/7945_2.png) [@shadowz7](https://community.homey.app/u/shadowz7)\ **Post date:** [June 23, 2020, 3:55pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/6 "2020-06-23T15:55:24Z")
Hi, how can I change the display from negative to positive? ---
**Author:** ![Gruijter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gruijter/32/1973_2.png) [@Gruijter](https://community.homey.app/u/Gruijter)\ **Post date:** [June 25, 2020, 6:56pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/7 "2020-06-25T18:56:55Z")
Not sure what you mean. Can you post a screenshot of the negative number you are refering to? ---
**Author:** ![shadowz7](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/shadowz7/32/7945_2.png) [@shadowz7](https://community.homey.app/u/shadowz7)\ **Post date:** [June 25, 2020, 7:03pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/8 "2020-06-25T19:03:12Z")
![Screenshot_20200625-205756](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/e/6/e6ca7d54635e897bdebd1f5ef0d56006375eb478.jpeg) ---
**Author:** ![Gruijter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gruijter/32/1973_2.png) [@Gruijter](https://community.homey.app/u/Gruijter)\ **Post date:** [June 25, 2020, 7:26pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/9 "2020-06-25T19:26:40Z")
What app gives you the solar power? And what advanced settings do you have for the solar device? ---
**Author:** ![shadowz7](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/shadowz7/32/7945_2.png) [@shadowz7](https://community.homey.app/u/shadowz7)\ **Post date:** [June 25, 2020, 7:32pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/10 "2020-06-25T19:32:22Z")
The App is the Fritz Bridge with DECT 200 energy meter. ---
**Author:** ![Gruijter](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/gruijter/32/1973_2.png) [@Gruijter](https://community.homey.app/u/Gruijter)\ **Post date:** [June 25, 2020, 7:56pm UTC](https://community.homey.app/t/solar-panel-and-smile-p4-power-shown-wrong-on-the-energy-tab/20122/11 "2020-06-25T19:56:50Z")
I think you need to contact the app developer, unless there is some advanced setting in the homey device.