Daily Energy Budget (Van DC Load)
Estimate daily Wh/Ah, peak DC amps, and a main fuse size from your device list. Fast planning for 12/24/48 V van systems. Free, no signup.
How accurate is this for fridges or compressor loads?
For daily energy, it’s good if you use average W. For peaks, compressor start is on the AC side—use the Inverter Sizing tool for that.
Should I size the main fuse exactly as shown?
Use it as a starting point. Confirm against cable ampacity and available fuse sizes/holders.
Does changing from 12 V to 24 V affect Wh/day?
Wh/day stays the same. Ah/day = Wh / V, so Ah/day decreases at higher voltage.
How do I handle inverter efficiency?
If you input AC devices, adjust to DC by dividing AC watts by your inverter’s efficiency.