This is a strong concept for a Marine Onboard Digital Control Panel, but it is too broad to safely start the schematic without a few key system choices.
I’d break it into these major blocks:
Main controller
Touchscreen or button/display control panel
MCU or embedded Linux module
Firmware update/debug interface
DC load control
Lighting outputs
Pump outputs
Fused/monitored high-current 12 V or 24 V channels
Manual override/failsafe options
Battery management
House battery voltage/current monitoring
Start battery voltage/current monitoring
Low-voltage disconnect logic
Alternator/generator/shore/solar awareness if needed
Solar input
Solar voltage/current sensing
MPPT/charge-controller interface, or integrated charge control if desired
Tank levels
Fresh water, black water, fuel, etc.
Need to know sensor type: resistive sender, capacitive, ultrasonic, pressure, NMEA 2000, etc.
Generator input
Start/stop control?
Runtime/status monitoring?
AC voltage/frequency sensing?
Safety interlocks required
Weather and wind
Barometer
Temperature/humidity
Wind speed/direction input
Optional GPS/NMEA 0183/NMEA 2000 integration
Marine communications
CAN/NMEA 2000 is likely the best long-term backbone
Optional Wi-Fi/Bluetooth/app interface
Optional RS-485/NMEA 0183
Before I design the schematic, I need these decisions:
Is the boat electrical system 12 V, 24 V, or both?
Maximum current per output channel for lights and pumps?
How many controlled outputs do you want?
Do you want a touchscreen, physical switches, or both?
Should this integrate with NMEA 2000, or be standalone?
What battery chemistry: lead-acid, AGM, lithium/LiFePO4?
Do you want this board to directly control high-current loads, or drive external relays/solid-state modules?
Is this for a prototype or something you intend to install permanently on a boat?
Recommended first architecture: 12/24 V marine input → protected power module → MCU control board → CAN/NMEA interface → isolated/ protected load driver outputs → sensor inputs → display/user interface.
Confirm those answers and I’ll turn this into a proper project specification, rename the project appropriately, and start the schematic architecture.