. Rather than confuse the situation, perhapd we can talk more in depth on the PV side after your HP is mind sorted:-) Using RCBOs do not necessarily require a split board however, due to the DC pressent on both the HP and PV, its recommended the circuits are divided to reduce the risk of tripping from DC lealage. Will work out later the ideal situation for the number of ways likely required and get back to you. P.
Cheers 🙂