The essentials in 30 seconds
- Three families coexist in 2026: classic mechanical circuit breakers (BEP, Blue Sea, the standard for recreational boating), CZone (Navico, integration with B&G/Simrad/Mastervolt), EmpirBus (Mastervolt, full MasterBus integration).
- Advantages of digital switching: load-by-load power monitoring (fridge, autopilot, etc.), smartphone control, scenario automation (Night mode = all off except navigation), data history.
- Drawbacks: 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 € VAT excluded installed). CZone for 45+ ft yachts newly equipped. 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 € VAT excluded hardware + 6-12 h workshop installation.
The electrical panel is the energy nerve center of the sailboat. It distributes power to circuits, protects against short circuits, and allows switching loads on/off. The 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 boating 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 digital system for high-end yachts with a full Mastervolt ecosystem (Alpha Pro alternator, MultiPlus, MLi Ultra). Native MasterBus architecture.
Classic BEP — the recreational boating standard
Skysat distributes the BEP range (Blue Sea sub-brand) with 6-12-24 circuit breaker panels:
- 12 V DC 8-circuit vertical panel ~ 325 € VAT excluded.
- 12 V DC 12-circuit horizontal panel ~ 503 € VAT excluded.
- CSP6 PTC 6-way watertight panel ~ 172 € VAT excluded for cockpit.
- Color DC Monitor with shunt ~ 635 € VAT excluded for load 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 € VAT excluded for 8 controllable outputs module.
- 6/12/24-way I/O modules, ~ 800-2 500 € VAT excluded 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 full 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 € VAT excluded for 50+ ft yachts.
Technical comparison table
| Criteria | Classic BEP | CZone | EmpirBus |
|---|---|---|---|
| 12-15 circuit panel price | ~ 500-800 € | ~ 3 500-5 500 € | ~ 6 000-9 000 € |
| Load-by-load power monitoring | No (global shunt) | Yes | Yes (MasterBus integrated) |
| Smartphone control | No | Yes (B&G/Simrad app) | Yes (Mastervolt app) |
| Scenario automation | No | Yes | Yes |
| CPU failure = total failure | No (mechanical) | Yes (manual bypass possible) | Yes |
| Maintenance | 30 € circuit breaker if faulty | 800-2 500 € module if faulty | 1 500-3 000 € 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 workshop standard. 12-circuit panel (~ 500 € VAT excluded) + separate battery shunt monitoring (BMV-712 at 215 € VAT excluded). Total ~ 750 € VAT excluded installed. Robust, easy to maintain.
40-55 ft new yacht already CZone — keep it
If the yacht is delivered with CZone by the yard (Bénéteau, Jeanneau, Hanse), keep it and enhance it during refit. Migration to classic = loss of integration and heavy work.
50+ ft yacht with Mastervolt ecosystem — EmpirBus
If a full refit includes MLi Ultra + MultiPlus + Alpha Pro, EmpirBus provides perfect integration. Relevant only with a majority Mastervolt ecosystem.
Installation and configuration
Workshop rules — panel installation
- Accessible position: standing height, at hand level, 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 (cut main battery).
FAQ — Electrical panels
Can a classic panel be converted to CZone?
Yes but heavy. Remove classic panel + install distributed I/O modules + central integration + software configuration. Allow 4-6 days + 4 000-6 000 € VAT excluded for a 40 ft sailboat. Often not relevant vs full winter refit.
What to do if a CZone module fails?
CZone allows a "manual backup" mode (physical bypass switch) on some modules. Otherwise, replace module in 1-2 days + 1 500-3 000 € VAT excluded per part. Plan for continuity of service if dependent.
Real energy savings with digital switching?
Yes on the annual balance. 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 down after leaving the boat, (2) monitor from the dock to check battery state in winter, (3) simple automation (turn on fridge 2 h before boarding).
6, 8, 12 or 24 circuit breakers?
30 ft sailboat: 8 circuits. 35-40 ft: 12 circuits. 45+ ft: 16-24 circuits. Always allow 20% reserve for future upgrades (adding equipment).
Skysat distributes BEP, CZone and EmpirBus. 2026 VAT-excluded prices are indicative for authorized distributor.
