First off, thanks for all the amazing posts. I have learned so much reading all the helpful information found on this site. Here is my situation, I recently purchased a 1976 Islander 36. The boat only had a 12v system present w/ 2 cranking batteries. The 12v panel is going but the existing 12v equipment is staying (lights, instruments, and radio). The boat was repowered in 2005 where they replaced the Atomic 4 with a M25XPB.
I am installing a new 110v and 12v system. This will include all of the equipment listed on the wiring diagram. I drew up the wiring diagram to help me with the install and for future maintenance. There were a couple areas I'm not a 100% on so I'm hoping to get some constructive criticism.
Obviously, some of the wiring isn't shown or simplified such as the DC branches or 110v out from the inverter.
Here are some of the questions I have:
1. I was trying to decide what battery fuses to go with. The inverter manual suggested a 250A Class T fuse. I'm fine with using those but I saw the MRBF's which might work better for my installation. Would this type of fuse work? The Blue Seas 5118 Class T fuse is listed with a AIC at 20,000 and the Blue Seas 5189 Terminal fuse (MRBF) is listed at 10,000. For the 4x6v house system, the 10,000 AIC should be enough, right? Also, should I use the 250A fuse on both the house bank and the reserve bank or should the reserve bank use a lower rated fuse?
2. Can someone double check how I have my DC neg bus and grounding bus set up. Is it close or did I miss the mark? It got a bit confusing towards the end.
3. Along the same lines, is the galvanic isolator located in the correct place? It seemed a bit funky tying the 110v panel ground into the grounding bus prior to connecting to the galvanic isolator.
4. Any idea what the amp draw is for the starter on a M25XPB? I wouldn't think more than 200 amps but that would only be a guess.
Again, feel free to pick my plan apart. I already have most of the equipment listed and would like to use it unless it absolutely will not work. I have some basic 110v experience with houses but a boat's electrical system is new territory for me. Thanks again for everyone's time reading this,