I posted this in the marine section, but this one seems much more active so I hope it's okay that I'm posting in both places.
My sailboat currently has 2x 100Ah Renogy 12v lithium batteries that I've been charging from shore power. These were setup by the previous owner to provide house power as well as starting for a 9.9HP outboard. I'm going to add solar and an inverter, as well as a DC-DC MPPT charge controller that will allow me to add a separate AGM starting battery. The components I've purchased include 2x 100W 12v Renogy solar panels, Renogy 30A DC-DC MPPT Solar Charge Controller, and a 1000W Renogy Inverter. Below is my first draft at a wiring diagram, and I'd appreciate any feedback. Some questions I have include:
My sailboat currently has 2x 100Ah Renogy 12v lithium batteries that I've been charging from shore power. These were setup by the previous owner to provide house power as well as starting for a 9.9HP outboard. I'm going to add solar and an inverter, as well as a DC-DC MPPT charge controller that will allow me to add a separate AGM starting battery. The components I've purchased include 2x 100W 12v Renogy solar panels, Renogy 30A DC-DC MPPT Solar Charge Controller, and a 1000W Renogy Inverter. Below is my first draft at a wiring diagram, and I'd appreciate any feedback. Some questions I have include:
- Should I use positive and negative busbars? My diagram currently assumes multiple ring terminals stacked on lugs. For a 12v system, is this better or are busbars preferred?
- I currently have a 1, 2, 1+2, Off battery selector switch. Is there any advantage in placing the 1,2,1+2, Off Battery selector between the positive terminals of the batteries so that I can isolate one battery as well disconnect both? Should I replace that switch with a on/off battery disconnect so that the batteries can be disconnected?
- Expanding on question 2, should I have a circuit breaker at the batteries or is the 100A fuse appropriate?