-- Professional Marine Wiring Diagrams
Electrical System Drafting
Create a complete, accurate record of your boat's electrical system with professional CAD wiring diagrams. Whether you've bought a vessel with missing documentation, completed modifications, or need records for insurance and surveys, our drafting service delivers clear, standards-compliant schematics that protect your investment and enable safe upgrades.
Insurance & Surveys
Professional diagrams help satisfy insurer requirements and give surveyors confidence in the installation.
Higher Resale Value
Professional electrical diagrams increase your boat's value and make it more attractive to buyers.
Safe Upgrades & Modifications
Accurate schematics are essential to prevent overloads, avoid voltage drop, size protection correctly.
Faster Repairs
Clear diagrams speed up diagnostics and repairs, saving labour costs and reducing time off the water.
Our Process
Initial Consultation & Quote Request
Our team will assess your electrical needs and provide a detailed quote.
We provide a fixed-price quote covering:
- On-site survey time
- Design and drafting services
- One round of revisions (if required)
First On-site Survey
Our team will conduct a survey of your existing electrical components & systems.
We document:
- Existing electrical components and systems
- Current draw for each component
- Power distribution points and connections
Drafting & Internal Review
Our team creates detailed CAD wiring diagrams based on the survey data, which are then reviewed for accuracy and compliance.
We ensure:
- Accurate and detailed CAD wiring diagrams
- Compliance with electrical standards and regulations
- Clear labelling and organization of all components
Second On-site Survey
Our team conducts a second survey focussed on wiring layout verification and sizing.
- Verification of CAD drawings against physical installation
- Noting wire gauge and routing details
- Checking wiring clearance and support requirements
Final Review & Reporting
Our team conducts a final review to ensure all systems are properly installed and documented.
- Final verification of all electrical systems
- Preparation of final documentation and reports
- Delivery of interactive, internally linked PDF schematics
Pricing Information
| Boat Size | Starting Price | Typical Scope |
|---|---|---|
| < 30 ft | £750 | Single battery bank, basic DC panel, shore power, simple AC |
| 30–40 ft | £950 | Multiple batteries, inverter, solar, moderate AC circuits |
| 40–50 ft | £1,200 | Complex battery systems, extensive AC, solar/generator, NMEA |
| > 50 ft | Custom quote | Multiple zones, redundant systems, bespoke requirements |
Factors that affect price include system complexity, accessibility, existing documentation and location. Travel within our Southern England service area (Southampton, Poole, Plymouth, Portsmouth, Brighton, Chichester) has no surcharge; outside this area modest travel fees may apply.
Rush options: 3–5 working days +20%; 48–72 hours +40% (subject to availability).
Questions & Answers
Yes. We regularly update outdated or inaccurate wiring diagrams following system modifications.
- On-site verification survey of the current installation
- Redrafting to reflect actual wiring configuration
- Structured reissue in interactive PDF format
- Optional standards-aligned review
This ensures your documentation accurately reflects the system as it exists today — essential for insurance, surveys and resale.
Owner presence is helpful but not essential.
If available, you can:
- Clarify modification history
- Provide access to secured areas
- Discuss planned upgrades
Alternatively, access can be arranged via marina staff, keyholders or vessel managers. We will contact you if clarification is required during the survey.
Typical turnaround is 5–10 working days from the initial survey.
- Consultation & quotation
- On-site survey
- Drafting and internal review
- Verification (if required)
- Final issue of documentation
Priority scheduling is available for urgent insurance or survey deadlines.
Planned upgrades can be incorporated into the documentation process.
- Future system expansion noted during survey
- Provision for lithium, solar or inverter integration
- Load and protection considerations identified
This ensures the documentation remains relevant as your electrical system evolves.
Yes. Lithium battery systems are fully documented, including:
- Battery configuration and specifications
- BMS integration
- Protection and isolation devices
- Integration with solar, inverters and shore power
Documentation reflects the installation as surveyed and supports insurance and compliance requirements.
All documentation is delivered as a professionally structured, high-resolution interactive PDF.
The file includes internal cross-referencing links, allowing instant navigation between connected circuits and continuation pages.
- Suitable for insurers and surveyors
- Clear circuit tracing
- Long-term vessel record keeping
- Accessible on desktop, tablet or mobile
Revisions can be issued if your system is modified in the future.
Yes. Expedited scheduling is available for urgent insurance or survey requirements.
Please advise of deadlines during consultation so timelines can be confirmed in advance.