How to reduce frequency of defrosts on Daikin Altherma?

[divenal (Dave Denholm)]

@chrisg

Not sure how I feel about putting all that energy into raising the flow temp to abort, switch to space, then switch back to DHW.

I had the same thought. Yet on another thread they’re talking about the benefit of heating the water in two separate time blocks, which I thought was interesting:
Daikon Altherma 3, sub 2 DHW COP