A Victron camper van electrical system is the most copied van build on YouTube for a reason: the parts talk to each other, the VictronConnect app shows everything on your phone, and the components are easy to get. This guide walks through a typical build in the order you would plan and install it, from the battery out to the loads, based on the most-watched van installs (EXPLORIST life, Lauren Lawliss and Matt’s Van) and checked against Victron’s own datasheets.
Electrical work can be dangerous: follow the manual, fuse and size every cable correctly, and use a licensed electrician for anything connected to household wiring.
The Core Parts of a Victron Camper Van Electrical System
| Job | Victron part | Key official spec |
|---|---|---|
| Charge from solar | SmartSolar MPPT 100/30 or 100/50 | 100V max PV open-circuit voltage; 30A or 50A charge current |
| Charge while driving | Orion XS 12/12-50A | 700W continuous up to 40°C, 1–50A adjustable |
| Monitor the battery | SmartShunt 500A | 6.5–70VDC, under 1mA draw |
| Make 120V AC | Phoenix inverter or MultiPlus-II | Phoenix VE.Direct 1200: 1,200W continuous at 25°C |
| Charge from shore power | MultiPlus-II or Blue Smart IP22 | Blue Smart IP22 12V: 15, 20 or 30A |
| Distribute and fuse | Lynx Distributor or busbars + fuses | Lynx Distributor holds four MEGA fuses |
Step 1: Size the Battery First
Everything else is sized around the battery. Add up your daily watt-hours (fridge, fan, lights, laptop, Starlink) and plan a battery that covers at least one to two days without sun. Most van builds in these videos use 200–460Ah of 12V LiFePO4. That range is what the creators used, not a recommendation for your loads.
Step 2: Plan the Wiring Order
The layout every one of these builds follows:
- Battery positive goes through a main fuse (often a class-T near the battery) to a positive busbar or Lynx Distributor.
- Battery negative goes to the battery side of the SmartShunt. Everything else connects to the system side of the shunt, so the shunt counts every amp.
- Each charger and load gets its own fuse on the positive busbar.
- A battery disconnect switch sits between the battery and the rest of the system.
The most common SmartShunt mistake in comments: connecting a load directly to the battery negative. Anything that bypasses the shunt is invisible to it, so your state of charge will drift.
Step 3: Solar With a SmartSolar MPPT
Victron rates the SmartSolar 100/30 for a nominal 440W of PV on 12V and the 100/50 for 700W. Panels in series raise voltage, so check the panels’ open-circuit voltage (Voc) in the coldest weather you expect stays under 100V. See our guide to connecting a Victron MPPT to solar panels.
Step 4: Alternator Charging With the Orion XS
Lithium house batteries can pull more current than an alternator should supply for long periods. The Orion XS limits that current (adjustable in 0.1A steps from 1 to 50A) and uses engine-running detection so it only charges when the alternator is working. Victron’s datasheet says it can be paralleled for more current. EXPLORIST life’s wire and fuse sizing video covers the cable side.
Step 5: AC Power: Phoenix or MultiPlus?
If you never plug into shore power, a Phoenix inverter is simpler and cheaper. If you plug in at campgrounds, a MultiPlus-II gives you an inverter, a charger and a transfer switch in one box. The MultiPlus-II 12/3000/120 is rated 2,400W continuous at 25°C, charges at up to 120A, and switches over in under 20ms.
Step 6: Monitoring
The SmartShunt sends battery voltage, current and state of charge to your phone, and shares voltage and temperature with Smart chargers over VE.Smart Networking. Add a Cerbo GX later if you want one screen, remote monitoring through VRM, or tank and temperature sensors.
Worked Example: A Daily Energy Budget for a Weekend-to-Full-Time Van
These are illustrative estimates for a typical build; your own loads will differ, so measure them with the SmartShunt once the system is running.
| Load | Assumption | Per day (est.) |
|---|---|---|
| 12V compressor fridge | cycling through the day | about 500Wh |
| Roof fan | about 3A for 8 hours at 12V | about 290Wh |
| LED lights | about 2A for 4 hours | about 100Wh |
| Laptop | 60W for 3 hours | about 180Wh |
| Starlink Mini | 25–40W average (Starlink spec), 6 hours | about 150–240Wh |
| Total | about 1.2–1.3kWh |
At 12.8V, 1.3kWh is roughly 100Ah a day, so a 200Ah LiFePO4 bank (about 2.5kWh) covers around two days without any charging. That matches the 200–460Ah range seen in the featured builds.
How the Three Chargers Share the Work
- Solar: a SmartSolar 100/30 at its full 30A and about 14V charging delivers roughly 400W at peak. Over a sunny day with around 4 peak sun hours, 440W of panels might return about 1.2–1.5kWh (estimate).
- Alternator: the Orion XS at 50A adds about 700W, so one hour of driving returns roughly 50Ah, about half a day of the budget above.
- Shore power: a MultiPlus-II 12/3000/120 charges at up to 120A, enough to refill a 200Ah bank from half full in about an hour (estimate).
With solar and driving combined, many vans stay balanced for days at a time without plugging in.
Final Install Checklist
- Label every cable at both ends.
- Confirm every positive feed has its own correctly rated fuse.
- Pair each Smart device in VictronConnect and update its firmware.
- Set the battery type and charge voltages on every charger to your battery maker’s figures.
- Enter the battery capacity and charged voltage in the SmartShunt so state of charge reads correctly.
For full specifications, see Victron’s pages for the Victron Lynx Distributor and Victron Phoenix Inverter.
As an Amazon Associate I earn from qualifying purchases, at no cost to you.
Parts: Victron SmartSolar MPPT 100/30 on Amazon, Victron Orion XS, Victron SmartShunt 500A on Amazon.
FAQ
Do I need a DC-DC charger in a van?
Yes, if your house battery is lithium and you charge from the alternator. A DC-DC charger like the Orion XS limits current to protect the alternator and charges with the correct voltage profile.
Phoenix inverter or MultiPlus for a van?
Phoenix if you only charge from solar and the alternator. MultiPlus-II if you also use shore power, because it adds a charger and transfer switch.
Where does the SmartShunt go?
On the battery negative. Every other negative connection must go to the system side of the shunt.
Do I need a Cerbo GX?
No. Each Smart device works with the VictronConnect app on its own. A Cerbo GX adds one dashboard, remote monitoring and automation.
Can I add more solar later?
Yes. The SmartSolar 100/50 handles a nominal 700W of PV on 12V, and you can add a second MPPT in parallel on the same battery.
What size battery suits a weekend van?
Many weekend builds start around 100–200Ah of 12V LiFePO4. Add up your daily watt-hours first and size from that.
Sources: Victron datasheets for SmartSolar MPPT 100/30 & 100/50, Orion XS, SmartShunt, Phoenix Inverter VE.Direct 120V and MultiPlus-II 120V (victronenergy.com); EXPLORIST life, “DIY Camper Van Electrical Install”; Lauren Lawliss, “Complete DIY Camper Van Electrical Install”; Matt’s Van, “Victron Off Grid System for Van Life”.
Related: EcoFlow Delta 3 Max for Van Life, LiTime 12V 50Ah LiFePO4 Battery Review, BougeRV Arch Pro 200W Flexible Solar Panel Review, plus the Victron Energy Guide