COMPLETE SYSTEMS DESIGN SOLUTIONS.
Ready-to-download wiring diagrams, electrical & mechanical system designs, and installation documentation for DIY boat owners, builders, and marine professionals. Know what to buy, how to build and where it all goes—so you can build it right the first time.
Professionally Designed
Every schematic is designed using industry-standard practices and verified for real-world performance.
Instant Download
Purchase securely and receive immediate access to your files. No waiting. No hassle.
Global Support
Need modifications or custom designs? We provide worldwide consulting and design support.
Featured Schematic Packages
Balmar Dual 250A Alternator Upgrade for Lithium
- Complete wiring diagram
- Cable schedule
- Fuse sizing
- Equipment list
Victron 24V 600Ah Package
- Complete wiring diagram
- Cable schedule
- Fuse sizing
- Equipment list
Charter Catamaran System
- Complete wiring diagram
- Cable schedule
- Fuse sizing
- Equipment list
24V 400AH Lithium Solar Base Pack
- Complete wiring diagram
- Cable schedule
- Fuse sizing
- Equipment list
Need a Custom Electrical System?
We design complete marine electrical and mechanical systems from concept through implementation.
From small boats to superyachts, we deliver solutions designed to perform.
Request Custom DesignConcept to Completion
Full system design from initial concept through implementation.
Expert Design
ABYC and ISO compliant designs *where applicable, so you can build with confidence.
Global Experience
Supporting boat builders and owners worldwide with proven solutions.
Dedicated Support
We help you through every step of your project.
Trusted by Boat Owners & Professionals
“Surge Marine designed and delivered an updated plan for the DC distribution on our 1990 sailboat. We had some good discussions on scope and drilled down into lots of details. Questions were always answered promptly during planning and installation. The drawings and material lists were very clear. The results reflect the importance of the plan. I could not have hacked this on my own.”
— Bill Wickett Owner“While refitting my old 40’ sailboat, I made the decision to rewire and upgrade the electrical system to lithium power. I broadly understood what components would be needed to feed and manage the system, but became overwhelmed by the complexity. Fortunately, I had seen work done by Surge Marine on social media and reached out for assistance. After some discussion, they delivered complete AC/DC system wiring diagrams with correct wire gauging, fuse ratings, and component integration, as well as an equipment list. With their help, I was able to make purchases, locate component installations, and wire the new system together with confidence. Surge Marine’s electrical diagrams have been added to my boat folder for easy reference and I remain grateful for their assistance with this project.”
— Daphne Douglas SV Izadora“These schematics are top quality. Helped us complete a complex installation on time.”
— James R. Boat Builder
Build It Right The First Time.
Professional designs. Immediate download. Expert support.