The essentials in 30 seconds
- Three families coexist in 2026: classic mechanical circuit breakers (BEP, Blue Sea, the pleasure-craft standard), CZone (Navico, B&G/Simrad/Mastervolt integration), EmpirBus (Mastervolt, full MasterBus integration).
- Advantages of digital switching: load-by-load consumption monitoring (fridge, autopilot, etc.), smartphone control, scenario automation (Night = everything 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 pleasure 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 45 ft sailboat digital panel: 4 000-8 000 € VAT excluded hardware + 6-12 h workshop installation.
The electrical panel is the nerve center of the sailboat’s power system. It distributes power to circuits, protects against short circuits, and allows turning 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
Pleasure-craft 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
Complete Mastervolt digital system integrating panel + battery monitoring + equipment control. Proprietary MasterBus architecture.
Classic BEP — the pleasure-craft standard
Skysat distributes the BEP range (Blue Sea sub-brand) with 6-12-24 circuit breaker panels:
- 12V DC 8-circuit vertical panel ~ 325 € VAT excluded.
- 12V 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 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 € 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 consumption 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 backup possible) | Yes |
| Maintenance | Circuit breaker ~ 30 € if faulty | Module ~ 800-2 500 € if faulty | Module ~ 1 500-3 000 € |
| Target program | 30-45 ft pleasure sailboats | 40-55 ft yachts | 50+ ft yachts with Mastervolt |
Workshop verdict by program
30-45 ft pleasure sailboat — classic BEP
Skysat’s standard workshop solution. 12-circuit panel (~ 500 € VAT excluded) + separate battery shunt monitor (BMV-712 at 215 € VAT excluded). Total ~ 750 € VAT excluded installed. Robust, easy to maintain.
40-55 ft new 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 refit. Migration to classic means losing integration and heavy work.
50+ ft yacht with Mastervolt ecosystem — EmpirBus
If doing a full refit with MLi Ultra + MultiPlus + Alpha Pro, EmpirBus provides perfect integration. Relevant only if Mastervolt ecosystem is dominant.
Installation and configuration
Workshop rules — panel installation
- Accessible position: standing height, within arm’s 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 classic panel + install distributed I/O modules + central integration + software configuration. Plan 4-6 days + 4 000-6 000 € VAT excluded 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 module in 1-2 days + 1 500-3 000 € VAT excluded for the part. Plan for continuity 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 off 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 plan 20% reserve for future upgrades (adding equipment).
Skysat distributes BEP, CZone and EmpirBus. 2026 VAT-excluded prices are indicative for authorized distributor.
