Description
Description
This wiring diagram is a professional redesign and regulation‑aware update of the widely shared Greg Virgoe campervan electrical layout.
While the original diagram is popular and widely circulated online, popularity does not automatically mean safety, compliance, or best practice.
This revision corrects key technical and safety issues and expands the layout into a fully structured, beginner‑friendly system covering:
- Complete DC system
- AC inverter and mains hook‑up system
- Neutral–earth bonding and RCD protection
- Correct fuse and protection strategy
- Proper battery isolation and distribution layout
- Detailed cable and fuse sizing tables
- Full component parts list
The diagram is designed for 12V campervan installations and supports Renogy 30A or 50A DC‑DC MPPT chargers with 1000W, 2000W, or 3000W inverter options.
⚠️ Why This Update Matters (Safety & Compliance)
The original layout, while helpful as a starting point, leaves several safety and compliance gaps when assessed against BS 7671 principles and real‑world installation experience.
Common issues found in the widely shared version include:
- Undersized inverter fuse selection relative to real‑world full‑load current
- Missing inverter casing bond to chassis
- No properly designed battery isolation strategy
- No clear RCD protection for hook‑up or socket circuits
- Incomplete AC earthing and bonding guidance
- Solar fuse arrangement that may not correctly protect panels wired in parallel
- No structured approach to cable sizing based on load, length, and installation method
Individually, these may seem minor. Collectively, they can result in:
- Nuisance fuse blowing or overheating
- Increased fire risk
- Electric shock risk due to non‑functional RCD protection
- Long‑term battery imbalance and hotspot damage
- Installations that do not align with UK/EU safety principles
This paid revision removes guesswork by:
- Correcting protection strategy
- Clarifying bonding and earthing requirements
- Introducing proper DC distribution via busbars
- Embedding cable and fuse sizing logic into the design
- Aligning the layout with recognised electrical safety standards
This is not just a “tidied up” version — it is a safety‑focused redesign intended to protect both your van and the people using it.
What’s Included (8–9 Page Structured Layout)
- Introduction & System Reference Table – system overview and walkthrough video reference
- Full DC System Overview (similar to original)– DC‑DC MPPT, solar, leisure batteries, inverter, busbars, cables, fuses, isolators
- DC Distribution View – detailed wiring and fused distribution layout
- Design Tables – selectable cable and fuse sizing based on 30A / 50A DC‑DC and 1000W / 2000W / 3000W inverter
- AC System Layout – inverter‑only and mains + inverter variations, RCD / RCBO / MCB wiring, N‑E bonding, earthing
- Complete Parts List – DC and AC components
- Design Notes & Installation Guidance
- Full Safety Disclaimer & Usage Notice
Is This Diagram Right for My Van?
YES – this diagram is suitable if:
- You have or plan to use Greg Virgoe’s wiring diagram
- You are building a 12V campervan electrical system
- You want a structured, regulation‑aware full system layout
- You are using a Renogy 30A or 50A DC‑DC MPPT charger
- You are using a 1000W, 2000W, or 3000W inverter
- You want cable and fuse sizing guidance built into the design
NOT SUITABLE – this diagram is not for you if:
- You are building a 24V system
- You require a fully bespoke vehicle‑specific design
- Your components differ significantly from those listed
➡️ If you’re unsure, e‑mail jolly@vandercampadventures.com before purchasing and I’ll confirm suitability.
Author / Designer Reassurance
This revised wiring diagram has been designed by Jolly Goode, a qualified electrician with over 20 years’ experience in campervan and off‑grid electrical systems.
The layout represents a practical balance between safety, regulatory compliance, clarity, and cost for beginner installers.
There are multiple safe ways to build this system. This diagram presents one structured and recommended approach.
For a fully bespoke wiring diagram tailored to your exact van and components, professional support is available.
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