My Grid import for last week:

1 Jan 41.5kwh

2 Jan 25.21kwh

3 Jan 30.1kwh

4 Jan 37.1kwh

5 Jan 39.55kwh

6 Jan 44.2kwh

we wfh so in all day. 

Grid import:

2022: 10158 not using weather comp/AI

2023: 8225 using wc/AI

Also note:
we used a hot tub quite a lot in 2022 but used less in 2023. Impacted grid import and solar export.
we have an elec car since June 2023 so actual comparative for 2023 will be under 8000 

Its complex making exact comparisons even though i try and keep a spreadsheet. so many variables! e.g. We sometimes import from grid to fill batteries and sell back to Octopus for profit in Saving Sessions and also in 2022 when prices were all over the place.
hot tub usage
e/v 

Overall I'm absolutely certain our usage is reduced by WC/AI

with regard to tariffs etc.... I do not have any Home Automation and have not looked into it a lot. Can the LG be integrated easily?

My tariffs are:

Import: Octopus Tracker (daily tracker not Agile)

Export: Octopus Fixed (15p)

I use Tracker for a number of reasons:
1. My inverter is only 2.6kw so I can't fill batteries very fast during cheap periods and can't draw from batteries very fast. So i need to use grid at all times.
2. With maximising WC/AI I prefer to keep constant running and not be having to control for tariff reasons

On solar...

I have 2 systems:

Original 7 panels 2kw. Pitched roof - south facing
on FIT but now transferred to actual export payment instead of assumed. Produces circa 1500kw pa

New system: 20 panels 6kw. 6deg/flat roof - east facing. Good sun until mid afternoon
Produces circa 5000kw pa

New system includes 3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter 

newer kit has advantage of ability to import/export at higher rates than mine

recommend looking at utilising emergency power supply - preferably with a gateway such as Tesla, Solaredge or Givenergy All in one so that it auto changes over.

Many installers don't bother to point you at EPS options!

@derek-m If you navigate to the UK LG Therma V heat pump owners group on facebook you will find a complete setup doc for AI I pulled together after my own struggles to get this right. Look in files section V2.

Posted by: @ians

↑

@derek-m If you navigate to the UK LG Therma V heat pump owners group on facebook you will find a complete setup doc for AI I pulled together after my own struggles to get this right. Look in files section V2.

Hi Ian,

Thanks for the link but I am not a facebook user, have never been and doubt that I ever will be. Just a friendly old dinosaur. 😋 

@ians Thank you - sounds like that will be a greatr help. Now just waiting for my request to join the group to be accepted.

Excellent document in the Facebook user group. Step by step guide on AI setup

https://www.facebook.com/share/g/HTnrvUAd5v6MwUV7/

@tim441

I would like to reinstate this thread please as Im going to try and sort out a friends LG heat pump. Could you just check what I think I have gleaned so far.

I can get into the SETTINGS menu by using the ver number as the password.

Select Temperature sensor: I can select 'Air+Water' if the thermostat is in a sensible position otherwise just 'Water'

Air Heating Set Temperature: ? Not sure what these do

Water heating Set Temperature ? Not sure what these do

LWT Temperature for Auto Mode: WC curve temperatures

Outdoor Temperature for Auto mode: WC OAT temperatures

After finished in SETTINGS, go back, then into the FUNCTION menu and set

Water Temperature Setting- Heating Temperature Setting to AUTO

Then go back to main screen and set heating to AUTO.

Their house should be idea for a heat pump as its got a big slab and UFH but its costing them a fortune to run at the moment. Just want to be sure I have it all sorted in my head before going over.

Thanks in advance

Good luck.. take it slowly. Ideally print the doc above and write down all changes so you can revert or seek guidance.

The Facebook group has helpful installers & service engineers - so recommend joining if you can.

After making main changes the tweaks may need to be done if house too hot or too cold.

I now use 5800kWh on AI (weather compensation) vs 8200kWh on fixed flow. Huge savings

Also check tariff. Depends on usage as well as if solar panels, batteries, EV etc.  In 2025 i imported 14500kWh at 8p kWh and exported 7500kWh at 15p. Net cost near zero!

Posted by: @bontwoody

↑

I would like to reinstate this thread please as Im going to try and sort out a friends LG heat pump. Could you just check what I think I have gleaned so far.

I can get into the SETTINGS menu by using the ver number as the password. 👍

Select Temperature sensor: I can select 'Air+Water' if the thermostat is in a sensible position otherwise just 'Water. 👍

Air Heating Set Temperature: ? Not sure what these do

16/25

Only works if using controller as your thermostat. Home shouldn’t go below 16 or above 25c.

Water heating Set Temperature ? Not sure what these do

20/55

Water heating will run between 20c and 55c when it needs to resolve it’s curve/heat (e.g. the heat you want)

I use 29/48

 

LWT Temperature for Auto Mode: WC curve temperatures 👍

Doc suggests 30/50. 

Outdoor Temperature for Auto mode: WC OAT temperatures 👍

Doc suggests 3/15 . If possible tweak lower if house warm enough. E.g-2i use -4/15

After finished in SETTINGS, go back, then into the FUNCTION menu and set 👍

Water Temperature Setting- Heating Temperature Setting to AUTO 👍

Then go back to main screen and set heating to AUTO. 👍

Their house should be idea for a heat pump as its got a big slab and UFH but its costing them a fortune to run at the moment. Just want to be sure I have it all sorted in my head before going over.

@tim441 Thanks Tim, I think its been set to a constant flow temperature of 54C looking at a photo, so it should make a massive difference to their bills 🙂

On the main controller you can easily press 

+ or - up to 5 deg

This allows temporary changes to test for a few days

- or if weather colder/hotter than normal 

- temp tweak if solar gain or holidays

Etc

- without changing the main settings

@bontwoody yes, that is shocking!!

Depending where you are hopefully it will run at under 40deg much of the time. Right now its 8deg outside here... LWT is at 38deg.... and house a comfortable 21deg.

Saving elec as well as better efficiency. I would not be surprised if savings 25 to 30%

Fyi I'm now on Octopus Intelligent Go tariff as I also have batteries and EV. import price for 2025 averaged under 10p kWh 

I guess they can currently feel the heat in the floor. With  AI and lower temps the floor may hardly feel warm! But should keep a very comfortable room temp all the same.

Let us know how it goes!