⚡ Van Electrical Load Calculator
Size your battery bank, solar panels, and inverter based on what you actually use. Add your appliances, set how long you run them, and we'll do the maths.
Your appliances
Appliance
Watts
Hours/day
Wh/day
Recommended setup
Daily consumption
0
Wh / day
Battery bank
0
Ah @ 12V (LiFePO4)
Sized to 80% DoD + 20% buffer
Solar panels
0
watts
Based on 4 peak sun hours (UK avg)
Inverter
0
watts (pure sine)
Peak load + 25% headroom
💡 Quick tips
- 🔋 LiFePO4 batteries can safely discharge to 80-90% DoD. Lead-acid should stay above 50%. We calculate for LiFePO4.
- ☀️ UK solar yield averages 3-5 peak sun hours in summer, 1-2 in winter. We use 4 hours — adjust down for winter trips.
- 🔌 Inverter sizing: Match to your highest single load (e.g., hair dryer at 2000W) not total daily consumption.
- 📱 Starlink draws ~40-50W and is one of the biggest loads in a modern van. Factor it in!
- 🧊 Compressor fridges cycle on/off. Actual average draw is ~30-40% of rated watts.