Open Hardware Load Controller

FrothFET is a DC load controller for doing digital switching of loads on your boat. With this board, you can control almost any type of DC load on your boat.

Specifications:

FrothFET Board Assembled

  • 8 x separately controllable channels
  • 20A current maximum per channel (with fans)
  • Built-in ATC fuses with bypass mode
  • Per channel current monitoring, accurate to 0.01A
  • Soft fuses and short protection
  • Run detection + Fuse failure + Bypass detection
  • Heavy 2oz copper PCB + thick bus bars
  • M4 (#8) screw terminals for secure and easy setup
  • Dimmable controls for LED lighting
  • 12v to 30v supply voltage (lead acid and lithium)
  • 100A total system power (beefy copper busbar)
  • easy system fusing with optional MEGA fuse on busbar.
  • 2x cooling fan headers with PWM or on/off control
  • 3D printable case w/ design files
  • ESP32-S3 controller with WiFi, Bluetooth, USB-C, etc.

Integrations

  • MQTT publishing
  • SignalK
  • Home Assistant
  • HTTP/REST endpoints
  • WebSocket real-time control

User Interface

FrothFET - Typical interface