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YOUR ENERGY PROFILE.
This document contains the sizing of your future electrical installation, calculated based on your appliances.
Inventory:
To guarantee 0WH without damaging your bank (80% max discharge):
Minimum power required to recharge your consumption:
Maximum power (with 25% safety margin).
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 |
The fuse protects the wire, not the appliance. Always place it as close to the power source as possible (battery or busbar).
0W
0 Ah
Lithium LiFePO4
Pompe, Leds, Frigo...
NON REQUI
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
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 |
| Laptop | 65W | 3h | 195 |
| Diesel heater | 15W | 8h | 120 |
| Daily consumption | 1547 Wh | ||
Adjust these values with the calculator below
| Spec | Original AGM (Schaudt) | LiFePO4 200Ah | LiFePO4 300Ah |
|---|---|---|---|
| Usable Capacity | 50Ah (50% DoD) | 200Ah (100% DoD) | 300Ah (100% DoD) |
| Weight | 28 kg | 22-25 kg | 30-35 kg |
| Dimensions | Fits factory bay | Check clearance | May need relocation |
| Charge Voltage | 14.4V | 14.6V | 14.6V |
| EBL 269 Compatible | Native | Yes (lithium profile) | Yes (lithium profile) |
| Cycle Life | 400-600 | 4,000+ | 4,000+ |
| Self-Heating | N/A | Required <0°C | Required <0°C |
| Cost | $150-200 | $450-600 | $700-900 |
| Upgrade Difficulty | N/A | Medium (EBL reprogram) | Medium (space check) |
The Schaudt EBL 269 on this model has configurable battery profiles accessible via the control panel or a dealer-level diagnostic tool. Set it to LiFePO4/lithium mode for correct charge voltage (14.6V). If your EBL doesn't have a lithium profile (older firmware), you'll need either a firmware update from a Challenger dealer or a standalone charger bypass. The Challenger has a factory solar prep on most models — a cable routed from the roof to the EBL, ready for a panel. Adding 200W solar is straightforward: panel on roof, MC4 through the existing cable entry, connect to the EBL solar input or a standalone MPPT. I recommend a standalone MPPT (Victron 20A) connected directly to the battery bus bar rather than through the EBL — it gives you Bluetooth monitoring and more efficient charging.
Links marked with * are affiliate links. If a purchase is made through them, I receive a commission at no extra cost to you. The editorial selection and product evaluation are not influenced by commission rates. Your click helps fund this free tool.
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