With the warm weather, I experimented with this today and got a COP of 6 on a DHW cycle. Heated 250L Daikin cylinder (essentially rebranded Oso?) from 36° to 46° this afternoon. Daikin 4kW in quiet mode (more quiet). It was only installed last week so I’m still tweaking the settings for best efficiency. Conflicted by the fact that I’m missing out on 15p export by doing this, and can run overnight at 7p on IOG.