Geyser timer solution for solar

[Splinter]

...and how do you know if Eskom is on/off at home while at the coast ?

Look at your solar app?

 

[Dimpie (JIGSAW)]

Look at your solar app?

Ok fair, but sounds like the OP is looking for an automated setup

 

[wingnut771]

Manually, via the app?

How do you know the grid is down?

 

[wingnut771]

Look at your solar app?

what would make you do that?

 

[ISP cash cow]

Look at your solar app?

does the app send a notification to say the grid is down or do you have to keep looking at your app to see if the grid has gone down?

 

[Lupus]

Installed around 50k

Wow which one did you go for? Mine was 25k for a 4.7kw super version

 

[denmendez65]

Water Heating Calculator

Use the water heating calculator to determine how much time and energy you'll need to increase the temperature of the water.

www.omnicalculator.com

To heat water from 30 to 70 with a 3kw element will take almost 3 hours using 6.9 units.
Heating to 55 from 30 will take an hour and 49 minutes, using 4.3 units.
The heating from 55 to 70 is an hour and five minutes longer and 2.6 units more.
So two baths will end up costing more in the long run as to get back to the 70 degrees is partially longer than from 30 to 55

Yeah but average bath after mixing is about 41 degrees. You need to mix a lot of geyser water at 55 with the 16 or 18 degree cold tap water to get the 41. At 70 you would use more cold water and less hot geyser water to hit the 41.

There is no cost as its free PV power. Thats why solar geysers are set way higher to capture and store as much energy from the solar hours as possible.

For your case or a grid tied geyser. 55 is fine.

 

[denmendez65]

There are two factors here, hardware and logic. CBI is great for the hardware, you still need something to manage the logic. Home assistant is best for that.

What logic does HA have that a normal smart timer cant do?

 

[isie]

Water Heating Calculator

Use the water heating calculator to determine how much time and energy you'll need to increase the temperature of the water.

www.omnicalculator.com

To heat water from 30 to 70 with a 3kw element will take almost 3 hours using 6.9 units.
Heating to 55 from 30 will take an hour and 49 minutes, using 4.3 units.
The heating from 55 to 70 is an hour and five minutes longer and 2.6 units more.
So two baths will end up costing more in the long run as to get back to the 70 degrees is partially longer than from 30 to 55

but if the sun is shining not only is it free but its making my payback period less (just dont look too much into that logic though )

 

[Splinter]

How do you know the grid is down?

Eskom se Push, solar app?

 

[isie]

...and how do you know if Eskom is on/off at home while at the coast ?

you log in to the inverter to check (or at least if you have notifications on it will send theses)

 

[Splinter]

what would make you do that?

Eskom se push?

They do local water shortages as well these days.

 

[Hazy_Living@79]

you log in tot to the inverter to check (or at least if you have notifications on it will send theses)

What inverter do you have isie?

 

[Splinter]

does the app send a notification to say the grid is down or do you have to keep looking at your app to see if the grid has gone down?

It doesn't, but I know so little about the Sunsynk app

 

[denmendez65]

you log in tot to the inverter to check (or at least if you have notifications on it will send theses)

Tuya App has an option to create something called a "scene". It sends you notifications if any of the conditions you have set are met (current, voltage, power, device fault etc) are above or below a setpoint. My timer was 130 bucks. Software is free.

 

[denmendez65]

Tuya App has an option to create something called a "scene". It sends you notifications if any of the conditions you have set are met (current, voltage, power, device fault etc) are above or below a setpoint. My timer was 130 bucks. Software is free.

Some of the options but it has a bunch of other stuff.

 

[SauRoNZA]

what would make you do that?

Sunsynk just pings you a notification the moment grid power is lost.

In iPhone land you could probably use that to trigger a Siri Shortcut and turn the geyser off.

 

[SauRoNZA]

Tuya App has an option to create something called a "scene". It sends you notifications if any of the conditions you have set are met (current, voltage, power, device fault etc) are above or below a setpoint. My timer was 130 bucks. Software is free.

Yeah but it wouldn't detect any of that since the timer will still be getting power via the inverter.

 

[SauRoNZA]

It doesn't, but the I know so little about the Sunsynk app

It does, but maybe just needs to be configured.

 

[SauRoNZA]

What logic does HA have that a normal smart timer cant do?

The logic you make your own...it's the data that matters.

Grid Status, Solar Input, SOC of Batteries, Load Shedding schedule etc. I have something like 5 or 6 different triggers on my geyser timer depending on conditions.