When diving into camper van conversions or upgrading a factory motorhome, designing the electrical system is often the most daunting task. Sizing solar arrays, matching inverters to battery discharge rates, and choosing the right lithium storage can quickly become overwhelming. At Van Junkies, based in Gosport, Hampshire on the UK’s South Coast, we design robust, reliable off-grid systems for everything from weekend surf vans to permanent liveaboard houseboats.

To take the stress out of your build, we’ve developed our Full Power System Kits. These are carefully curated, pre-designed bundles featuring industry-leading components from Victron Energy, Fogstar, and Beyond Batteries. Let’s explore our three main kit collections to help you power your exact style of UK and European adventure.

1️⃣ Why Buy a Pre-Designed Full Power Kit?

Building a campervan off grid electrical setup from scratch requires precise calculations. Buying a pre-designed kit removes that guesswork:

• Guaranteed Compatibility: Every component, from the Victron MPPT to the Fogstar lithium cells, is engineered to work together perfectly.
• Versatility Across Vehicles: Our systems drop seamlessly into popular base vehicles like the VW Crafter, Mercedes Sprinter, MAN TGE, Peugeot Boxer, and Citroen Relay.
• Motorhome Compatible: These kits are the perfect upgrade path for premium motorhome brands like Hymer, Frankia, Auto-Trail, Swift, Auto-Sleepers, and Elddis.

Pro Tip: Buying a complete bundle is often more economical than sourcing individual parts, saving you both time and money.

2️⃣ The Weekender Range

This range focuses purely on 12V efficiency, keeping things lightweight and affordable. Ideal for compact vans like VW Transporters or Ford Transit Customs just running a few essentials.

• Battery & Solar: Relying on high-quality leisure batteries (typically 100Ah) and compact solar arrays (100W-175W) to keep the essentials topped up.
• Inverter: Focused on 12V, so either no inverter is included or a small 250W-500W pure sine wave inverter purely for low-draw 230V tasks.
• Verdict: Affordable and perfect for the casual camper who prioritizes time outdoors rather than cooking with heavy electric appliances.

3️⃣ The Holiday Maker Range

When you are traveling in comfort for weeks without shore power, you need a system that offers predictable generation. This bridges the gap, allowing you to run diesel heaters longer, brew a proper coffee, or keep kids' tablets charged.

• Battery & Solar: Steps up to 200Ah+ of premium lithium storage and medium solar arrays (175W-350W).
• Inverter: Features mid-range Victron inverters (typically 800W to 1200W) capable of running hair dryers on low, blenders, or e-bike chargers.
• Verdict: The sweet spot for most vanlife enthusiasts. It delivers incredible freedom to roam off-grid without constantly monitoring your battery.

4️⃣ The Full Time Off-Gridder Range

When your van, large motorhome, or liveaboard houseboat is your permanent home, your power system needs to replicate a house. The Full Time Off-Gridder range provides total energy independence.

• Battery & Solar: Massive energy storage (300Ah to 460Ah+ Lithium setups) paired with large solar arrays (350W to 500W+) and heavy-duty DC-DC chargers.
• Inverter: Large 2000W to 3000W+ Victron MultiPlus inverter/chargers capable of seamlessly running heavy heating and cooking equipment.
• Verdict: A serious upfront investment that delivers absolute daily reliability for full-time living or heavy energy users.

5️⃣ Sizing Your Kit

Below is a quick guide to matching the Small, Medium, or Large tier to your vehicle type:

6️⃣ Custom UK Engineering & Support

• We partner with leading brands like Fogstar and Beyond Batteries to provide high-quality energy storage.
• Our systems exclusively integrate industry-leading components from Victron Energy for guaranteed compatibility.
• Based in Hampshire, our team provides expert UK-based advice and support throughout your entire journey to energy independence.

Need help selecting the right power kit for your campervan, motorhome, or off-grid cabin? Call us on 023 935 52732 or WhatsApp us directly from the website for expert advice, or get a Free Bespoke Quote here.