Hi
If you want a single box to do mains, solar and B2B charging, and trickle charge the vehicle battery, I can’t find much to beat this fella:
https://www.12voltplanet.co.uk/votronic-vbcs-12v-triple-charger-45a-dc-to-dc-30a-mains-350w-solar.html
Quite expensive and all eggs in one basket, I...