smart immersion clock for economy 7

holcus

My old immersion clock is almost dead (Grasslin QE7). It's around 80€ to get a new one so I figured for that price I can get a nice smart wifi controlled switch. But its not that simple as I'm reviewing threads here, turns out none of the suggestion quite fit the bill:

I have a economy 7 storage heating system with sink and bath mode with heating element for each mode.

I am thinking these are my requirements
- 2 gang
- interlocking - so I cannot enable both heaters at the same time
- 13A - 3000W per gang
- wifi

some of the products suggested here:
https://www.alertelectrical.com/optimum-connect-wi-fi-socket-box-mounted-time-switch-op-sbwf01.html
https://www.amazon.co.uk/Timeguard-Controlled-Timeswitch-Socket-FSTWIFI/dp/B07228W28L/ref=pd_sbs_201_1

only has 1 gang, i wont be able to use SINK heater

https://www.lightinthebox.com/en/p/sonoff-dual_p6293479.html
has nice features but only 10A per device - each of my immersion heaters is 3000W ~ 13A so thats no good - also no interlocking

sonoff has also a 4 gang switch that does interlock but still 10A per channel only.

possibly solutions like this one could work for me:
https://www.inotapa.com/index.php?main_page=product_info&products_id=146568&fbclid=IwAR0juS9gNQ-kUD0VkJ_x0Ugm_dJ_ENvQWcl2TePeUuQJVduWp66Wkdwb9Y8

but that sounds like a lot of work - making plugs etc and still no interlocking.
I'm just a begginer DYIer.

Can you suggest a proper solution or am I stuck with analog solutions?

coylemj

holcus wrote: »

I have a economy 7 storage heating system with sink and bath mode with heating element for each mode.

Do you have full timer control over both modes? I know you can't have both elements heating at the same time but aside from that, do you have unrestricted control over when sink and bath are activated?

Example: If you chose to, could you set 'Sink' to come on from from 9 a.m. to 10 a.m. and 'Bath' to turn on from 1 p.m. to 3 p.m.?

The reason I ask is because any Economy 7 timer I've come across will only allow the Bath element to heat during off-peak hours.

For example, on the Sangamo website, there is only one 2 channel timer and the user manual says the following....

This product differs from a simple time switch as it has programs built in that match with Economy 7, Economy 10 and Eco 20:20 electricity tariffs.

This ensures your tank operates during off peak times avoiding expensive peak use. As such this controller is not freely programmable

https://www.sangamo.co.uk/collections/immersion-controllers/products/powersaver-dual-flexi

holcus

Do you have full timer control over both modes?

bath has a full timer controll, sink only has a knob which I can set to 15,30,60 and 120 mins.
SINK timer is manual only - it has to be set each time
I can set my BATH clock to any time of the day I like - neither BATH or SINK are restricted to the night

The Sangamo on is pretty much the same as my old one just with digital display.
I am looking for something bit more fancy, with an app and ability to controll it remotely.

Thanks!

coylemj

holcus wrote: »

The Sangamo on is pretty much the same as my old one just with digital display.
I am looking for something bit more fancy, with an app and ability to controll it remotely.

OK, what you're looking for is effectively the function you have at the moment which is a two-channel timer but with the ability to control the timer remotely from an app.

I searched high and low about two years ago and at that stage, there was no such a device out there. I have the Timeguard Wi-Fi timer but it's a single channel device only so it sits between the mains feed and the Sink/Bath switch....

https://www.timeguard.com/products/time/immersion-and-general-purpose-timeswitches/wi-fi-controlled-fused-spur

2011

Use use Sonoff devices throughout my home. The Sonoff TH16 can switch up to 16A or far more via a contractor. These devices can be controlled via a free app and which can display the current water temperature too. There are numerous Sonoff devices available including 5 channel DIN rail mounted versions. They also work with Google Home / Alexa. Expect to pay around €15 for a Sonoff TH16.