The essentials in 30 seconds
- Three families coexist in 2026: classic mechanical circuit breakers (BEP, Blue Sea, the standard for recreational sailing), CZone (Navico, integrated with B&G/Simrad/Mastervolt), EmpirBus (Mastervolt, full MasterBus integration).
- Advantages of digital switching: load-by-load power monitoring (fridge, autopilot, etc.), smartphone control, automation scenarios (Night = everything off except nav), data history.
- Disadvantages: hardware cost 3-5× higher, configuration complexity, electronic dependency (CPU failure = total failure), training required for service.
- Workshop verdict: classic BEP for 70% of 30-45 ft recreational sailboats (~ $500-800 USD installed). CZone for 45+ ft yachts already equipped new. EmpirBus for 50+ ft yachts with a full Mastervolt ecosystem.
- Budget for a complete digital panel on a 45 ft sailboat: $4,000-8,000 USD hardware + 6-12 hours workshop installation.
The electrical panel is the sailboat’s central nervous system for power distribution. It distributes power to circuits, protects against short circuits, and allows turning loads on/off. Digital generation (CZone, EmpirBus) adds monitoring and automation but costs 3-5× more. This article distinguishes use cases.
The three panel families
Classic — mechanical circuit breakers
Recreational sailing standard since the 1970s. Thermal-magnetic circuit breakers (Blue Sea, BEP) mounted on a panel with ammeter/voltmeter. Robust, simple, economical.
CZone — Navico digital
Navico digital switching system, integrated with B&G/Simrad/Mastervolt ecosystems. Distributed I/O modules + central interface via chartplotter or dedicated display.
EmpirBus — Mastervolt digital
Mastervolt’s complete digital system, integrating panel + battery monitoring + equipment control. Proprietary MasterBus architecture.
Classic BEP — the recreational sailing standard
Skysat distributes the BEP range (Blue Sea sub-brand) with panels featuring 6-12-24 circuit breakers:
- 12V DC 8-circuit vertical panel ~ $325 USD.
- 12V DC 12-circuit horizontal panel ~ $503 USD.
- CSP6 PTC 6-way watertight panel ~ $172 USD for cockpit use.
- Color DC monitor with shunt ~ $635 USD for load consumption monitoring.
CZone — the Navico/Mastervolt ecosystem
Distributed architecture: I/O modules near loads + central interface on Zeus/Vulcan chartplotter or dedicated COI display.
- COI Combination Out Interface ~ $2,410 USD for an 8-controllable-output module.
- I/O modules 6/12/24-way, ~ $800-2,500 USD each.
- Central interface via Zeus 3S or dedicated display.
- iOS/Android smartphone app for remote control.
EmpirBus — full Mastervolt integration
Mastervolt system for high-end yachts with a complete Mastervolt ecosystem (Alpha Pro alternator, MultiPlus, MLi Ultra).
- NXT Touch modules (integrated display), NXT Lighting (lighting), NXT Switching (outputs).
- Native MasterBus integration: lithium bank monitoring + panel in a single interface.
- Complete system budget ~ $6,000-12,000 USD for 50+ ft yachts.
Technical comparison table
| Criteria | Classic BEP | CZone | EmpirBus |
|---|---|---|---|
| 12-15 circuit panel price | ~ $500-800 USD | ~ $3,500-5,500 USD | ~ $6,000-9,000 USD |
| Load-by-load monitoring | No (global shunt) | Yes | Yes (MasterBus integrated) |
| Smartphone control | No | Yes (B&G/Simrad app) | Yes (Mastervolt app) |
| Automation scenarios | No | Yes | Yes |
| CPU failure = total failure | No (mechanical) | Yes (manual backup possible) | Yes |
| Maintenance | $30 USD circuit breaker if faulty | $800-2,500 USD module if faulty | $1,500-3,000 USD module |
| Target program | 30-45 ft recreational sailboats | 40-55 ft yachts | 50+ ft yachts with Mastervolt |
Workshop verdict by program
30-45 ft recreational sailboat — classic BEP
Skysat’s standard workshop solution. 12-circuit panel (~ $500 USD) + separate battery monitoring shunt (BMV-712 at $215 USD). Total ~ $750 USD installed. Robust, easy to maintain.
40-55 ft yacht already equipped with CZone — keep it
If the yacht is delivered with CZone by the builder (Bénéteau, Jeanneau, Hanse), keep it and enhance it during refits. Migrating to classic means losing integration and extensive work.
50+ ft yacht with Mastervolt ecosystem — EmpirBus
If doing a full refit with MLi Ultra + MultiPlus + Alpha Pro, EmpirBus provides perfect integration. Only relevant with a majority Mastervolt ecosystem.
Installation and configuration
Workshop rules — panel installation
- Accessible position: standing height, within easy reach, near the saloon.
- Ventilation: 5-15 W dissipated depending on active loads. Not in a closed locker.
- Consistent wiring: strict color code (red = positive, black = negative, yellow = ground), labeling on each circuit.
- Final documentation: annotated electrical diagram, user manual, emergency procedure (shut off main battery).
FAQ — Electrical panels
Can a classic panel be converted to CZone?
Yes, but it’s heavy work. Remove the classic panel + install distributed I/O modules + central integration + software configuration. Plan 4-6 days + $4,000-6,000 USD for a 40 ft sailboat. Often not cost-effective vs a full winter refit.
What if a CZone module fails?
CZone allows a "manual backup" mode (physical bypass switch) on some modules. Otherwise, replace the module in 1-2 days + $1,500-3,000 USD for parts. Plan for continuity if heavily dependent.
Real energy savings with digital switching?
Yes, on an annual basis. Load-by-load monitoring detects hidden consumption (fridge cycling too often, screens left on at night). Typical savings 15-25% on total consumption.
Is the smartphone really useful day-to-day?
Yes for 3 cases: (1) remotely shut everything off after leaving the boat, (2) monitor from the dock to check battery state in winter, (3) simple automation (turn on the fridge 2 hours before boarding).
6, 8, 12, or 24-way circuit breakers?
30 ft sailboat: 8-way. 35-40 ft: 12-way. 45+ ft: 16-24-way. Always plan 20% extra capacity for future upgrades (adding equipment).
Skysat distributes BEP, CZone, and EmpirBus. 2026 USD prices are indicative for authorized distributors.
