Many thanks crossy for your advice.
I will check about day/night usage but will not be off grid as will need it sometimes for sure.
Maybe worth looking at doing a smaller system and no battery to start with and I can always add more later.
As we don't usually go over 25 units for around half the year a smaller system might be better but will need to see the size and consumption of a swimming pool as it would surely bring the usage back up
Was that 40-50 panel's needed as might need a bigger garage roof
Well worth the investment