ASHP and WonderWatt

MrMessy

Just curious who else here has an ASHP (A2W, A2A, GS).

What tariff are you on, are you planning on switching tariff over winter, how does/will WW help you reduce your costs?

Pourl

A2A, Agile + Outgoing Fixed (15p). No changes planned for winter.

First gen inverter needs multiple slots to top up batteries, WW makes it easy.

Keith

Pourl I've had an LG Therma V 9kW ASHP + rads installed in July. July 2023 I had a 6kW Solar system (micro-inverters)+ GivEnergy 9.5kW battery installed. I also have an eddi and zappi, althoug don't own an EV yet.

After having electric rads, where we just heated individual rooms, I am very much looking forward to a warmer winter ahead. I have already noticed a saving on the hot water, which has more pressure than before and is hotter. After a bath the ASHP reheats in about 15 minutes.

I changed from a fixed tariff with Octopus the end of July to Agile and rolled over Outgoing Fixed (15p) until August 2025, so was quite relieved at 'Pourl's' first line.

I'd also be interested in any advice on the best way to run it with regardss to set back (4-7pm) settings and good charging practice aided with WW.

I'm one for spreadsheets, so after the winter I should have a good idea of what it costs to run and whether it is as efficient as they say.

Keith (Southend)

Tima441

Keith hopefully you're running with weather compensation (AI) which is far more efficient than fixed flow temps. Excellent Facebook group can help with document and best settings.
I have had a LG ashp since 2021 with GivEnergy batteries & pv solar from 2020.
Using Agile import and fixed export.

Suggest only very small setback during 4-7pm as cost of bringing temp back up may be more than the saving otherwise. I'm experimenting with INCREASING temp by 0.5deg in the period 1-4pm to help ensure peak usage minimised.

Tima441

Keith interested to see if you find the Eddi worthwhile.
I think with export at 15p it's better to export as much as possible. The ashp should heat DHW with SCOP efficiency of say 3. Almost certainly making that the best option

MrMessy

Keith on Agile, I'd be tempted to modify the heating profile to match the Cosy profile ie. +0.5deg in the cheap periods and -0.5deg between 4-7pm (as @Tima441 says).
It's not necessarily the most efficient, but should be more cost effective without sacrificing any comfort.

It may take you a while to get your weather curve dialled in, but you cant really know if you've got that right until it's properly cold anyway.

Keith

Tima441 Many thanks for your reply. It does has (AI), what is the name of the Facebook Group? Sounds useful reading and also I realise this community is for WW.

Keith (Southend)

Tima441

Keith https://www.facebook.com/groups/716683532924964/?ref=share

Keith

Tima441 Perfect, I've applied to join. Thank you.

Keith

MrMessy Weather's my hobby, so should be on top of that one :-) Thanks Keith