Marine & Boating Power Systems
Marine & Boating Power Systems
From a weekend sailboat to a bluewater cruiser — ABYC-compliant Victron systems that handle shore power, solar, alternator, and generator charging in a saltwater-tough package.
Choose Your Build Tier
Marine electrical systems deal with corrosion, vibration, bilge hazards, and multiple charging sources. All three tiers use Victron’s marine-rated components and follow ABYC E-11 wiring standards.
- 100–200Ah LiFePO4 house bank (12V)
- 100–200W flexible or rigid solar panel
- Victron SmartSolar MPPT 75/15 or 100/20
- Victron Phoenix 12/800 or 12/1200 inverter
- Victron SmartShunt 500A
- Victron Orion-Tr Smart 12/12-18A DC-DC (engine alternator)
- Victron Battery Protect (load disconnect)
- 200–400Ah LiFePO4 house bank (12V or 24V)
- 300–600W solar (flexible or hard panels)
- Victron SmartSolar MPPT 100/30 or 100/50
- Victron MultiPlus-II 12/3000 or 24/3000 (inverter/charger + shore power)
- Victron Cerbo GX + VRM remote monitoring
- Victron Orion-Tr Smart 12/12-30A or 24/24-17A DC-DC
- Galvanic isolator on shore power inlet
- Victron SmartShunt 500A
- 400–800Ah LiFePO4 (24V recommended)
- 600W–1kW solar array
- Victron SmartSolar MPPT 150/60 or 150/100
- Victron Quattro 24/5000 (shore power + generator dual input)
- Victron Cerbo GX + GX Touch 50 + NMEA 2000 integration
- High-output alternator via Victron Orion-Tr Smart
- Galvanic isolator + isolation transformer
- Generator auto-start via Cerbo GX relay
Key Victron Components
Marine installations demand corrosion-resistant, ignition-protected components. Victron’s lineup meets ABYC E-11 requirements and integrates with NMEA 2000 networks via the Cerbo GX.
ABYC E-11 Compliance Matters
Marine wiring standards require ignition-protected devices in engine compartments, tinned copper wire, properly rated fusing within 7 inches of the battery, and color-coded conductors. We design all our marine installs to meet or exceed ABYC E-11.
Inverter / Charger
Single unit replaces a separate inverter, battery charger, and shore power transfer switch. Accepts 30A or 50A shore power. PowerAssist prevents tripping the dock pedestal breaker.
Quattro — Dual AC Input
Two AC inputs — connect shore power to Input 1 and a generator to Input 2. The Quattro automatically selects the best source and can charge from both simultaneously. Essential for offshore passages with a genset.
MPPT Solar Charge Controller
Manages solar input on boats where deck space limits panel size. Bluetooth-enabled for monitoring from the chart table. VE.Direct connects to the Cerbo GX for unified system visibility.
DC-DC Alternator Charger
Charges the house bank from the engine alternator while motoring. Galvanically isolated to protect against stray current corrosion — critical in a marine environment. Works with smart alternators.
System Hub + NMEA 2000
Connects all Victron devices and outputs battery state, solar production, and AC load data onto the NMEA 2000 network — visible on any compatible chartplotter (Garmin, Raymarine, Navionics).
Galvanic Isolator
Blocks low-frequency DC currents that travel through the shore power ground conductor and cause underwater metal corrosion. Required any time you connect to shore power in a marina.
Size Your System
Marine loads — refrigeration, watermaker, autopilot, nav instruments, anchor windlass — vary significantly by vessel type. Run the numbers before buying components.
System Load Audit
Add your fridge, watermaker, autopilot, nav lights, instruments, and other loads — get your true daily Wh demand.
Battery Bank Sizing
Enter your daily load and days of autonomy — get the right Ah for your house bank at sea.
Solar & MPPT Sizing
Size your marine solar array and select the right SmartSolar controller for 12V or 24V systems.
DC Wire Sizing
ABYC-compliant wire sizing for your battery runs, MPPT cables, and DC distribution panel feeds.
Marine Pro Tips
What separates a bulletproof boat electrical system from one that fails at anchor 50 miles offshore.
⚡ Always Install a Galvanic Isolator
Shore power ground conductors carry stray DC current that silently eats your through-hulls, prop, and shaft. A galvanic isolator (or isolation transformer for full protection) blocks this. Non-negotiable for any boat that regularly docks at a marina.
🚢 Isolate Engine Start from House Bank
Keep your engine start battery separate from the house bank. Use a dedicated Victron Orion-Tr Smart to top up the house bank from the alternator without combining the two banks. You’ll always have start power even if the house bank is depleted.
💡 Use Tinned Copper Wire Throughout
Bare copper oxidizes rapidly in a marine environment — especially in bilge areas or near salt air. Tinned copper wire (required by ABYC) resists corrosion at the conductor level, not just at the terminals. Don’t cut corners here.
📡 Connect Cerbo GX to Your Chartplotter
The Cerbo GX outputs battery state-of-charge, solar production, and AC load data onto NMEA 2000. Compatible Garmin, Raymarine, and Navionics displays can show your full electrical status right at the helm — no need to go below to check the system.
☀️ Flexible Panels for Curved Decks
Rigid panels are efficient but hard to mount on most sailboat cabintops or powerboat hardtops. Semi-flexible mono panels (100W each) can follow the deck curve and are far easier to install with minimal drilling. Shade from rigging is your bigger efficiency loss anyway.
🔥 Fuse Within 7 Inches of the Battery
ABYC E-11 requires a fuse or circuit breaker within 7 inches of each battery terminal on ungrounded conductors. In a bilge environment a short can ignite fuel vapors. A properly fused system is the difference between an electrical fault and a fire.
Guides & Articles
Deep dives on marine-specific electrical topics from our team.
Victron Cerbo GX Setup Guide: VRM Remote Monitoring Step by Step
Configure your Cerbo GX, integrate NMEA 2000, and monitor your boat’s electrical system from anywhere.
MultiPlus vs MultiPlus II — Which One Do You Need?
Key differences between Victron’s two most popular inverter/chargers and which one fits a marine install.
How to Size a Victron SmartSolar MPPT: The Complete Guide
Choosing the right MPPT for limited deck space on 12V and 24V marine systems.
Ready to upgrade your boat’s electrical system?
We design and install ABYC-compliant Victron systems for sailboats, powerboats, and cruisers in the Houston area — and can ship components and provide remote design support anywhere in the US.