# Controling of Solar Geyser **URL:** \ **Category:** Free discussion\ **Created:** [October 17, 2023, 9:31am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030 "2023-10-17T09:31:34Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![staniland1212](https://avatars.discourse-cdn.com/v4/letter/s/a587f6/32.png) [@staniland1212](https://forum.ewelink.cc/u/staniland1212)\ **Post date:** [October 17, 2023, 9:31am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/1 "2023-10-17T09:31:34Z")
Hi, I currently make use of solar geysers in my home where they are controlled by a Geyserwise device The geyserwise has a 12v solar pump circulating the water between the tube manifold on my roof and water in the geyser in my ceiling. The geyserwise has a control panel where you set timers. The geyserwise has 2 temperature probes. 1 goes into the temperature pocket on the tank and the other into the tube manifold on my roof. When the temperature in the manifold is 7° higher than the water in the tank, the geyserwise switches on the pump to circulate water. And stops when temp is less than 5. My question: Can this somehow be replicated with a TH switch and waterproof temperature sensor? Can these switches take 2 sensors? Or could 2 TH switches talk to each other in a scene somehow? The switching on and off of a 220v pump to circulate the water is the easy part. I want to keep this within eWeLink if possible as I don’t know how to use IFTT etc… Any ideas? ---
**Author:** ![songal](https://avatars.discourse-cdn.com/v4/letter/s/c67d28/32.png) [@songal](https://forum.ewelink.cc/u/songal)\ **Post date:** [October 17, 2023, 10:01am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/2 "2023-10-17T10:01:59Z")
This can be done in the ewelink app using the scene’s temperature difference function. ---
**Author:** ![staniland1212](https://avatars.discourse-cdn.com/v4/letter/s/a587f6/32.png) [@staniland1212](https://forum.ewelink.cc/u/staniland1212)\ **Post date:** [October 17, 2023, 10:17am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/3 "2023-10-17T10:17:53Z")
Can you a difference in temp between 2 TH switches? Within 1 scene? ---
**Author:** ![staniland1212](https://avatars.discourse-cdn.com/v4/letter/s/a587f6/32.png) [@staniland1212](https://forum.ewelink.cc/u/staniland1212)\ **Post date:** [October 17, 2023, 10:20am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/4 "2023-10-17T10:20:59Z")
I don’t see how this is possible within a scene. I have looked. I have TH switch…under a scene I don’t see a difference in temp. And I’d need 2 switches…so a scene between the 2 in theory. ---
**Author:** ![deondutoit11](https://avatars.discourse-cdn.com/v4/letter/d/b3f665/32.png) [@deondutoit11](https://forum.ewelink.cc/u/deondutoit11)\ **Post date:** [October 17, 2023, 12:44pm UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/5 "2023-10-17T12:44:40Z")
HI. I have the exact same setup, only 2 geysers with 2 geyserwise units. I bought the TH16 with waterproof probe 2 months ago. i fastened the probe to the coldwater outlet from the geyser that goes to the solar manufold. i made the set point 53 C and used the ewelink app for the automation. i later moved the automation to iHost because i bought 1. it has been running with no problems for 2 months. my ON time is 9 in the morning and OFF time is 3 in the afternoon. when the geysers reach that temp they both switch off untill 2morrow. ---
**Author:** ![deondutoit11](https://avatars.discourse-cdn.com/v4/letter/d/b3f665/32.png) [@deondutoit11](https://forum.ewelink.cc/u/deondutoit11)\ **Post date:** [October 17, 2023, 12:47pm UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/6 "2023-10-17T12:47:28Z")
With the TH 16 you might as well sell the geyserwise to a friend because the ewelink app works great. you can also have an automation that turns on a geyser element if the temp is below 45 in the afternoon, just for an hour or so. just use a relay then that switches the 12volt pump on and off when needed. ---
**Author:** ![staniland1212](https://avatars.discourse-cdn.com/v4/letter/s/a587f6/32.png) [@staniland1212](https://forum.ewelink.cc/u/staniland1212)\ **Post date:** [October 17, 2023, 12:59pm UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/7 "2023-10-17T12:59:04Z")
Ok, cool. How do you circulate the water? Did you fit a 220v pump to the TH switch? And then it just runs all day? And only switches off at 53°? ---
**Author:** ![staniland1212](https://avatars.discourse-cdn.com/v4/letter/s/a587f6/32.png) [@staniland1212](https://forum.ewelink.cc/u/staniland1212)\ **Post date:** [October 17, 2023, 12:59pm UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/8 "2023-10-17T12:59:54Z")
Ah nee. Can I call you? Or WhatsApp me 0813908907 🙏🏼 ---
**Author:** ![songal](https://avatars.discourse-cdn.com/v4/letter/s/c67d28/32.png) [@songal](https://forum.ewelink.cc/u/songal)\ **Post date:** [October 18, 2023, 2:06am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/9 "2023-10-18T02:06:33Z")
Of course, you need to have two temperature and humidity sensor devices, and then set the temperature difference between the two devices as a trigger condition inside 1 scene ![9b27637d3788ef3421c8ee16e70fd49](https://europe1.discourse-cdn.com/flex005/uploads/ewelinkforum/original/2X/e/e61e34ddf171ad891e6289b5c245f0012eda9ecf.jpeg) ![b39151c0a80ce9754b7a764d3913ed3](https://europe1.discourse-cdn.com/flex005/uploads/ewelinkforum/original/2X/e/ea62b3c045c1970ea3317d08f24b39b1191fc7bd.jpeg) ![9566042d783c27c9ff9e9382f7cf006](https://europe1.discourse-cdn.com/flex005/uploads/ewelinkforum/original/2X/f/f8c883cb4601e25162f6f4d1e0b481f5e6acb811.jpeg) ![530f654f16a850d1fe7c996dbfe3b78](https://europe1.discourse-cdn.com/flex005/uploads/ewelinkforum/original/2X/f/f85e7f810984735310ed22873a04edf942a73f8b.jpeg) ---
**Author:** ![staniland1212](https://avatars.discourse-cdn.com/v4/letter/s/a587f6/32.png) [@staniland1212](https://forum.ewelink.cc/u/staniland1212)\ **Post date:** [October 18, 2023, 3:42am UTC](https://forum.ewelink.cc/t/controling-of-solar-geyser/23030/10 "2023-10-18T03:42:43Z")
Thank you for this.