An open-source alternator regulator for LiFePO4

Launch Pricing
$390 MSRP: $590
Order now →
X Engineering alternator regulator — V7 prototype in cherry enclosure

More capable and less expensive

Visible diagnostics NOT silent misbehavior
Open source NOT a sealed black box
True state of charge NOT voltage-based estimates
Bumpless, cascaded PID control NOT Oscillation and voltage spikes
WiFi app NOT tiny dip switches
Vessel data interface NOT just a charge controller

What It Does

Truly maximizes alternator output — safely

  • Actively manages thermal, electrical, and mechanical constraints
  • Sensible settings that work out of the box
  • Deep configurability for advanced users
  • Includes alternator durability physics model and visual trend tracking for early failure warnings

Keeps you informed

  • Live feed to App for hundreds of parameters
  • Full historical logs — not just snapshots
  • Compare to fleet reference data, always updating
  • Programmable alarms on any fault condition

Saves fuel and alternator wear

  • Pulls weather forecasts based on your GPS position
  • Charges when you need it, or let's your Solar work first

Works with your existing system

  • 12V, 24V, and 48V LiFePO4 — same hardware, same software
  • Nothing here is proprietary, locked, or restricted
  • Integrates with BMS, shunts, Victron equipment, NMEA 2000 networks

Cruising Intelligence Network

Each regulator optionally contributes to a shared, anonymous dataset of real-world vessel performance, conditions, and energy use, going far beyond the alternator.

  • Anchorage and Passage Comfort — motion-based scoring derived from onboard accelerometer data
  • Speed & Efficiency — real-world performance comparisons across similar boats
  • Energy Production and Use — alternator and solar output across different climates, seasons, and usage patterns
  • Exploration History — track ports visited, passage lengths, and fleet cruising patterns
  • Leaderboards and Records — highlights top performance across the fleet

Tech

About

X Engineering builds open-source marine electronics focused on control, transparency, and real-world performance. The goal is simple: systems that behave predictably, expose what they’re doing, and can be understood and modified by the people using them.

Developed and tested in real cruising environments, with an emphasis on reliability.

Read more about the project →