Design Consultancy

Engineered plans for confident DIY installation

The journey to energy independence starts with a flawless design. Our Off-Grid Design Consultancy is built for DIY installers who want the satisfaction of building their own system with the certainty of a professional, calculation-perfect schematic.

Your offgrid solution

For just £150, we create a precise, safety-compliant blueprint tailored to your setup — helping you avoid costly mistakes and build a system you can rely on for years to come.

We turn your energy goals into a precise, professionally engineered plan using Victron’s proven design principles. Every element – from cable sizing and fusing to inverter and battery selection – is calculated for performance and safety. The result is a clear, installer-ready design pack that removes uncertainty and ensures your DIY system runs efficiently and reliably.

Who is it for

We've got experience in supporting a range of off-grid projects

01

Camper Van or Motorhome

Maximise every inch of space with a compact, efficient off-grid design built for life on the move. We’ll ensure your batteries, charging system, and inverter work seamlessly together to deliver safe, dependable power wherever the road takes you.

02

Boat or Marine Vessel

Get a marine-grade electrical design tailored to the demands of life at sea. From corrosion-resistant components to safe charging and inverter management, your system will deliver consistent power whether you’re moored or underway.

03

Remote Cabin or Home

Design a fully self-sufficient system that meets your year-round energy needs with confidence. We’ll size your solar, batteries, and inverter to keep everything running smoothly through all seasons — no grid required.

04

Workshop or Outbuilding

Power your tools, lighting, and equipment with a properly balanced, standalone energy system. We’ll calculate your loads, plan safe wiring routes, and design a setup that keeps your workspace productive and independent.

Take the guesswork out of your off-grid plans

We can help you understand exactly what you need.

Common questions

Gain confidence in your calculations

An off-grid electrical system is a significant investment. The wrong component, cable size, or fuse rating can lead to poor performance, damaged equipment, or serious safety hazards. Our design service removes the guesswork and gives you total peace of mind. Our Victron specialists will calculate and specify:

Your total power consumption and storage needs.
The optimal battery bank size and chemistry.
The ideal solar array wattage and configuration.
Correct inverter/charger and solar charge controller sizing.
Safe and appropriate cable gauges, fusing, and circuit protection.

All you need

What you'll get

After our consultation, you will get a complete design package, including:

Professional wiring schematic

A precise, easy-to-read diagram showing how every part of your electrical system connects. It helps you or your installer see exactly how everything fits together, ensuring a safe, efficient, and tidy setup.

Complete Parts List

A comprehensive breakdown of every component needed for your system — from the Victron core equipment to the correct cables, lugs, fuses, and fixings — so you can order confidently and know you have everything required.

Full Calculation Breakdown

We include all the key load, capacity, and charging calculations used to design your setup, clearly showing how we’ve matched your specific energy use, storage needs, and charging sources for optimum performance.