I would appreciate help reviewing my wiring diagram for a sailboat

DIY
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  1. You show a Lynx Power in for the batteries. How are you fusing these. Mega fuses have too low interrupt current and are not suitable. You could use separate Class T, the Lynx Class T or a Lynx Distributor with Adler EF3 fuses as in this post EF3 fuses in Lynx Distributor.
  2. You show resettable breakers, make sure that these are from reputable manufacturer such as BlueSea.
  3. There is a lot of info on parallel Multiplus systems here, VE Bus parallel. See limits on model / firmware for parallel set up. Set up properly in parallel the Cerbo sees them as one system.
  4. I would have thought 16A shore power is also common so a 3600W isolation transformer, would be useful, but agree not a necessity.
  5. I recommend using the Orion XS or Orion 1400 DC to DC converters. These are newer products and connect to the Cerbo GX and charging can be fully controlled by the BMS unlike the older Orions. The newer Orions also have programmable charge current so you could reduce to say 40A if your alternators were running hot at 50A. The newer Orions are non-isolated so your starter and house batteries would need to share a common negative.
  6. The Cerbo can connect 4 resistive tank senders directly. The GX Tank 140 can connect 4 tank senders, either voltage or 4-20mA. You need to choose senders to match.
  7. Read the Cerbo manual about connecting to NMEA2000 etc.
  8. I have not checked your wiring in detail, it looks OK on a quick look.