Leafgrey Controls
Yacht bridge systems and vessel monitoring displays
Marine technology
Newport, Rhode Island

Vessel systems integration for modern marine platforms.

Leafgrey Controls Inc. combines advanced marine electrical systems, digital switching, Victron integration, networked vessel systems, and AI-assisted vessel intelligence — built for large pleasure and commercial vessels.

Ask Leafgrey AIExplore capabilities

Explore marine electrical systems, vessel technology, troubleshooting, calculations, or any subject you want to discuss. Full access is available directly on the site. No membership required.

Serving Newport, Rhode Island, and the surrounding marine community

ABYCNMEA 2000VictronCE

Platform focus

Marine technology · vessel systems integration

AI · public
Focus
Vessel systems
Service area
Newport, RI
Core stack
Victron + AI
Delivery
Integration
  • Power-system modernization & digital switching
  • Victron Lithium NG · GX · VE.Can integration
  • Leafgrey AI — full public technical access

Optional account only saves history and vessel resources — create one if useful.

Vessel intelligence

From onboard electrical systems to intelligent diagnostics

Leafgrey does not bolt a dashboard onto an opaque vessel. We integrate marine electrical systems, digital switching, Victron platforms, and networks — then deploy the intelligence layer that understands them: edge processing, electrical-native diagnostics, crew co-pilot interfaces, and a living digital twin.

Open Leafgrey AI

Local-first edge processing

Inference and rules run shipboard — close to BMS, GX devices, and digital switching — so connectivity never blocks critical alerts.

Marine electrical fluency

Leafgrey AI and diagnostics reason in SOC, charge limits, bus voltage, N2K drop, and inverter mode — not generic IoT tags.

Crew & shore co-pilot

Natural-language Q&A, guided procedures, and shift digests that turn sparse alarms into actionable vessel narratives.

Living digital twin

As-builts, equipment IDs, and live telemetry fused into a twin that updates as systems are modernized.

Capabilities

Marine electrical systems, automation, and intelligence

Vessel systems integration spanning power-system modernization, Victron platforms, digital switching, networks, and AI-assisted diagnostics.

Vessel Intelligence

Capability domain

Leafgrey deploys a vessel intelligence layer above generation, storage, distribution, digital switching, and sensors — correlating signals, detecting anomalies, and giving crew and shore teams a shared operational picture on large pleasure and commercial platforms.

Edge inference
Digital twins
Anomaly detection
Crew decision support

Advanced monitoring

Telemetry the intelligence layer actually uses

Live demo of a Victron-integrated 25.6 VDC Lithium NG house system — voltage, current, SOC, charge sources, loads, BMS status, and predicted runtime in a professional vessel monitoring layout.

House bank · Lithium NG 25.6 V class

Victron-integrated vessel energy system

BMS OK
Charge limit 100 A
Discharge limit 100 A
Cell Δ 12 mV

Battery voltage

26.78 VDC

State of charge

79%

Battery current

-30.9 A

Battery temp

24.1 °C

DC load

27.4 A

AC load

1.0 kW

Solar

0.75 kW

Predicted runtime

10.2 h

Shore input0.00 kW
Alternator0.57 kW
Generator input0.00 kW
Inverter output0.48 kW

Normal operating window

~26.4–27.2 VDC float / discharge · ~28.0–28.4 VDC absorption charge

System alarms

No active anomalies · baselines within band

Historical energy

Demo window · production systems store multi-month time-series

Technical tools

Marine electrical calculators

Practical tools for vessel systems work — start with Ohm’s law below. Additional calculators unlock in Inside Access for registered members.

Interactive

Ohm’s law calculator

Enter any two of voltage, current, resistance, or power.

Results

V
— V
I
— A
R
— Ω
P
— W

Enter any two known values.

Inside Access tools

Additional calculators are available to registered members.

DC voltage-drop calculator

Create an account to unlock this calculator and save results to your vessel profiles.

Create an account

Programming & systems intelligence

Beyond conventional marine electrical installs

Leafgrey Controls builds deeply integrated vessel systems — hardware, onboard networks, telemetry pipelines, automation, and intelligent diagnostics — with credible software practice, not buzzwords.

battery_telemetry.py
Python
1def estimated_runtime_h(soc_pct: float, capacity_ah: float, load_a: float) -> float:
2    if load_a <= 0:
3        return float('inf')
4    remaining_ah = (soc_pct / 100.0) * capacity_ah
5    return remaining_ah / load_a
6
7def discharge_anomaly(vbat: float, ibat: float, soc: float) -> bool:
8    # Lithium NG 25.6V class — flag abnormal discharge under light load
9    if ibat < -5 and vbat < 26.2 and soc > 40:
10        return True
11    return False

Edge status log

[telemetry] vbat=26.92V soc=86% ibat=-18.4A temp=24.1C

[ve.can] node=bms state=OK charge_limit=100A discharge_limit=100A

[nmea2000] bus_v=12.41 devices=18 err=0

[mqtt] publish vessel/house/battery retained

[rules] no anomaly · baseline within 2σ

[edge] inference cycle 42ms · local-first

Python

Telemetry pipelines, analytics, ML inference

TypeScript

Dashboards, APIs, edge services

JavaScript

Node-RED functions, browser tools

Node-RED

Event-driven vessel automation

MQTT

Pub/sub telemetry fabric

REST / WebSockets

API integrations & live streams

NMEA 2000

Navigation & sensor backbone

CAN / VE.Can

Victron power-system bus

Modbus

Meters, gensets, industrial IO

Victron GX

Cerbo / Ekrano system brain

Time-series DB

Historical energy & events

Edge compute

Local-first processing

Leafgrey AI

Vessel electrical intelligence — open to everyone

Ask Leafgrey AI anything about marine electrical systems, calculations, troubleshooting, or a modernization plan. Full capability is public; accounts only save your work.

Leafgrey AI

Public · full technical capability

No membership required
ContactOptional: save with account

I'm Leafgrey AI — Leafgrey Controls' marine electrical and vessel-systems intelligence system.

Full access is public. No membership required.

Ask deep technical questions, run calculations, troubleshoot systems, brainstorm a modernization, or talk through an idea. Optional accounts only save history, profiles, and documents — they do not unlock a different AI.

I use approved website knowledge, technical retrieval, structured diagnostics, and a deterministic equation engine. I will not invent live vessel data or company claims.

Escalate anytime: +1 401-302-2516

Full public AI · no live telemetry · educational guidance · optional account only saves history

Delivery model

Survey. Architect. Integrate. Learn.

Marine electrical systems and the intelligence layer are planned together — so monitoring and Leafgrey AI inherit real topology.

  1. 01

    Survey

    Vessel walkthrough, electrical inventory, network map, and telemetry audit — establish what the platform can already report.

  2. 02

    Architect

    AC/DC architecture, digital switching topology, Victron integration plan, and intelligence data model designed together.

  3. 03

    Integrate

    Distribution, GX devices, networks, automation, dashboards, and monitoring commissioned as one coherent stack.

  4. 04

    Learn

    As-builts, baselines, and operational history become living knowledge for Leafgrey AI and Inside Access resources.

Optional account

Save your work in Inside Access

Leafgrey AI is available to everyone. Create an optional account to save conversations, calculations, vessel information, and technical resources — not to unlock the AI.

  • Saved calculations & profiles

    Keep vessel voltages, battery banks, and calculator results for later sessions.

  • Technical library bookmarks

    Articles, guides, and worksheets organized for your projects.

  • Documents & equipment lists

    Upload manuals and keep equipment inventories with your account.

  • Ready to expand

    Foundation for project records, reports, and future live vessel integrations.

Create optional accountContinue with public AI

Convenience features (optional)

Advanced electrical calculators
Marine power-system calculators
Technical vessel articles by Leafgrey Controls
System-integration deep dives
Victron system guides
Digital-switching resources
Diagnostic procedures
Wiring and system-design references
Vessel technology case studies
Interactive technical diagrams
Downloadable worksheets
Project-planning resources
Product and technology evaluations
AI-assisted troubleshooting tools
Saved calculator results
Saved vessel profiles
Personalized technical recommendations

Sample library topics

  • Victron

    Victron 25.6 VDC Lithium NG operating windows

    Normal float, charge absorption, discharge floors, and what Leafgrey monitors on NG banks.

  • Networks

    VE.Can backbone layout for multi-device plants

    Termination, power insertion, and device order patterns that stay maintainable after refits.

  • Controls

    Digital switching scenes with SOC-aware shedding

    How hotel scenes coordinate with inverter limits and lithium charge state.

  • Diagnostics

    NMEA 2000 voltage-drop field procedure

    Measuring backbone voltage under load and isolating long-run drop faults.

About

Specialized marine technology for integrated vessel systems.

Leafgrey Controls Inc. is a marine technology and vessel-systems company. We connect advanced marine electrical systems, automation, digital switching, Victron platforms, onboard networks, remote monitoring, custom dashboards, data analytics, and AI-assisted vessel intelligence into coherent, maintainable installations.

The Leafgrey Controls Team works with vessel owners, captains, and yards who need more than a conventional install — systems that are documented, observable, and ready for intelligent diagnostics.

Serving Newport and vessels throughout Rhode Island and Southern New England

Newport service area

Serving Newport, Rhode Island, and the surrounding marine community.

Deep integration

Electrical hardware, NMEA 2000, CAN/VE.Can, MQTT, and software layers designed to work as one system.

Vessel intelligence

Local-first processing, anomaly detection, and Leafgrey AI decision support grounded in marine electrical reality.

Southern New England reach

Serving vessels throughout Rhode Island and Southern New England from a Newport focus.

Contact

Discuss your vessel systems project

Tell us about the platform, Victron or digital-switching scope, monitoring goals, or modernization timeline. We respond with clear next steps.