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Fact-checked on Mar 30, 2026
VANPOWERCALC.COMYOUR ENERGY PROFILE
YOUR ENERGY PROFILE.
This document contains the sizing of your future electrical installation, calculated based on your appliances.
Minimum Daily Consumption
0 WH / DAY
Inventory:
SYSTEM SIZINGPage 2
Battery
To guarantee 0WH without damaging your bank (80% max discharge):
0 AH
LiFePO4 12V
Solar
Minimum power required to recharge your consumption:
0 W
via MPPT
220V AC
Maximum power (with 25% safety margin).
0 W
No Need
Safety & CablingPage 3
12V Cable Sizing Guide
Use this professional reference table to select the correct gauge (mm²) for your cables. For 12V in a van, the maximum tolerated voltage drop is 3%. Always use multi-stranded flexible automotive wire.
| Current (A) | Round trip < 2m | Round trip 4m | Round trip 6m |
|---|---|---|---|
| 5A (LEDs, USB) | 1.5 mm² | 2.5 mm² | 4 mm² |
| 10A (Fridge, Pump) | 2.5 mm² | 4 mm² | 6 mm² |
| 20A (Heater) | 4 mm² | 10 mm² | 10 mm² |
| 50A (DC/DC Booster) | 10 mm² | 16 mm² | 25 mm² |
| 100A (Inverter) | 25 mm² | 35 mm² | 50 mm² |
Fuse Sizing
The fuse protects the wire, not the appliance. Always place it as close to the power source as possible (battery or busbar).
- Wire 1.5 mm² → Max fuse 10A
- Wire 2.5 mm² → Max fuse 20A
- Wire 4 mm² → Max fuse 30A
- Wire 6 mm² → Max fuse 40A
- Wire 10 mm² → Max fuse 60A
SCHÉMA ÉLECTRIQUE
PANNEAUX SOLAIRES
0W
RÉGULATEUR MPPT
BATTERIE AUXILIAIRE
0 Ah
Lithium LiFePO4
FUSIBLE
FUSIBLE
BOÎTE À FUSIBLES 12V
Pompe, Leds, Frigo...
CONVERTISSEUR 220V
NON REQUI
PRO GEARPage 4
SHOPPING LIST
Where to find this equipment? Here is the community-approved selection.
12V 6-way Fuse Box
Mandatory protection
Digital Multimeter
Test your connections
Heavy Duty Crimping Tool
For perfect lugs
Heat Shrink Tubing
Insulation and safety
GENERATED BY VANPOWERCALC.COM
Traveling in a van with a baby changes the electrical game completely. The bottle must be warm at 3am, the water heater must work for the daily bath, the fridge must keep milk cold, and the inverter must run a sterilizer. No room for improvisation.
This family setup is designed around reliability and redundancy. 300Ah LiFePO4 ensures 2 days of autonomy without sun, 400W panels provide fast recharging, and a 2000W pure sine inverter powers all baby equipment. The instant water heater is a must for daily comfort.
Expert tip
Pro tip: the 230V charger (Victron Blue Smart IP22) is essential with a baby. When you stop at a campsite or a friend's house, plug in to recharge to 100% in a few hours. It's your safety net. Many van families alternate 2-3 nights free camping + 1 night at a campsite with hookup — the ideal rhythm to never stress about battery.
Example calculation for your setup
Results based on a typical use case
| Appliance | Power | Usage/day | Wh/day |
|---|---|---|---|
| Compression fridge | 45W | 24h | 1080 |
| LED lighting | 20W | 4h | 80 |
| Water pump | 30W | 0.5h | 15 |
| Phone charging | 15W | 2h | 30 |
| Daily consumption | 1205 Wh | ||
Recommended LiFePO4 battery
151 Ah
(80% depth of discharge)
Recommended AGM battery
241 Ah
(50% depth of discharge)
Recommended solar panels
402 Wc
4h average sun hours
Recommended inverter
No 220V appliances — no inverter needed
Adjust these values with the calculator below
Comparison table
| Component | Model | Specs | Price |
|---|---|---|---|
| LiFePO4 Battery | Redodo 300Ah | 300Ah, 12.8V, built-in BMS | ~€550 |
| Solar Panels | Renogy 4x100W Mono | 400W total, roof mount | ~€330 |
| MPPT Controller | Victron SmartSolar 100/30 | 30A, Bluetooth | ~€150 |
| DC-DC Charger | Renogy DCC30S | 30A, LiFePO4 profile | ~€110 |
| Pure Sine Inverter | EDECOA 2000W | 2000W continuous, 4000W peak | ~€200 |
| 230V Charger | Victron Blue Smart IP22 30A | Shore power, campsite | ~€120 |
| Compressor Fridge | Alpicool T50 | 50L, 12V/230V, -20°C | ~€250 |
| Water Heater | Camplux 5L Instant | Gas, zero electrical draw | ~€120 |
| Fuse Box | Blue Sea ST Blade 12 | 12 circuits + bus bar | ~€55 |
| Battery Monitor | Victron SmartShunt 500A | Bluetooth | ~€75 |
| RCD Breaker | Schneider 30mA | 230V circuit protection | ~€35 |
| Battery Cables | 50mm² + lugs | Complete set | ~€45 |
| Outlets + USB | USB-C PD + 12V + 230V | Child-safe complete kit | ~€55 |
| LED Lighting | Dimmable spots | 10-point kit, warm white | ~€50 |
| Safety Kit | CO detector + extinguisher + outlet covers | Family safety kit | ~€60 |
| Miscellaneous | Lugs, fuses, conduit, mounts | Wiring kit | ~€60 |
| **TOTAL** | **~€2,265** |
About this tool
Vanlife With a Baby: When Electricity Becomes Critical#
Traveling in a van with a baby (0-3 years) is an incredible adventure. But unlike a child-free couple, you CANNOT improvise. A cold bottle at 3am = a screaming baby. A dead fridge = lost breast milk. This build is designed for absolute reliability.
Baby-Specific Power Needs#
- Bottle warmer: 100-150W for 5 min, 3-6 times/day = 50-75Wh
- Electric sterilizer: 500W for 10 min, 1-2 times/day = 85-170Wh
- Instant water heater: 1500W for 10 min/day (baby bath) = 250Wh
- 50L fridge (milk, purees, medicine): 420Wh/day
- Constant ventilation (air quality): 100Wh
- Humidifier (optional, winter): 30W x 8h = 240Wh
- Night light + dim lighting: 20Wh
- Video baby monitor (charging): 10Wh
The Non-Negotiable: Redundancy#
With a baby, you ALWAYS need a plan B:
- Battery: 300Ah = 3,600Wh, meaning 2+ days autonomy
- Charging sources: solar + DC-DC + shore power (230V charger)
- Inverter: 2000W for heavy consumers (water heater, sterilizer)
- Battery monitor: Victron SmartShunt for real-time level monitoring
Electrical Safety With a Baby#
- Outlet covers on all accessible 230V and 12V outlets
- 30mA RCD breaker on the inverter circuit
- Secured cables — no cable within baby's reach
- Emergency cutoff (battery disconnect) accessible from cabin
- CO detector mandatory if using diesel or gas heating
Frequently asked questions
What's the minimum electrical setup for a van with a baby?▼
Bare minimum: 200Ah LiFePO4 + 200W solar + 1500W inverter + DC-DC. But we recommend 300Ah + 400W for 2 days of stress-free autonomy. Warm bottles and a cold fridge aren't optional with a baby — reliability beats budget.
Does an instant water heater use a lot of electricity?▼
A 1500W instant heater for the daily baby bath (10 min/day) uses 250Wh — about 7% of a 300Ah battery. That's manageable. The alternative: a gas water heater (Camplux 5L, ~€120) that uses zero electricity. Many van families combine both.
How to keep breast milk cold in a van?▼
A 50L compressor fridge (Dometic, Alpicool) holds a stable 2-4°C, perfect for breast milk (4-day fridge life). With our 300Ah build, the fridge runs 24/7 without issue. Tip: place a digital thermometer inside — milk must never exceed 4°C.
What electrical safety precautions with a baby?▼
5 essentials: 1) Outlet covers on all accessible outlets, 2) 30mA RCD breaker on the 230V circuit, 3) All cables secured overhead or under furniture, 4) Battery disconnect accessible to adults only, 5) CO detector if using diesel or gas heating. And always: an accessible fire extinguisher.
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