Robobrew water volumes

[Ghillie]

Looking at my profile I have it set for 2l boil off per hour.

I strike in with 19l and sparge about 13l

Boil volume is 27.68l
Post boil 25.68l
Loss to trub 2.65
Into fermenter 22l

My numbers have been all over the place recently so I think I'll have to do a simple brew and double check everything.

They’re very specific volumes. 0.68L accuracy?

You won’t be losing 2.65L to trub post boil. Sounds like you’re not accounting for dead space in your calculations.

FYI if you’re getting 22L into the FV from a 27.68L preboil then you’ll be looking at 4-4.5L/hr boil off when accounting for 4% shrinkage.

It would be worthwhile revisiting Gash’s Robo profile bud, especially if you’re finding your numbers are a bit off. I can’t see you ever dialling your numbers well with the values you’ve shared with your own profile.