Electrical

The Heart of the System

The power system is the key, central feature of the van's mobility. Without reliable electricity, nothing else works.

Power Consumption Analysis

Following the Pareto principle, I focused on the devices consuming the most energy:

• Water heater: 1500W (AC)
  
  • Air conditioning: 300W (AC)
    
    • Laptop: 100W (AC)
      
      • Miscellaneous: 100W (DC)
        • fan, toilet, lights
          
          

          Power Generation Sources
          
          Three charging methods ensure power availability:
          
          1. Car alternator (while driving)

          • DC-DC charging
            2. Solar panels
            • 525W array with MPPT controller
              3. Shore power
              • When available at campsites or cities
                
                The Victron MultiPlus inverter provides both charging capability and automatic transfer switching between battery and shore power.
                
                

                Energy Storage
                
                Battery Bank: 4 × 100Ah Battle Born LiFePO4 Batteries
                
                Total Capacity: 400Ah @ 12V = 4,800Wh usable
                
                Lithium iron phosphate (LiFePO4) batteries offer:
                

                • Longer lifespan (3000+ cycles)
                  
                  • Deeper discharge capability
                    
                    • Lighter weight than lead-acid
                      
                      • Better temperature performance
                        
                        

                        Electrical Specifications
                        
                        #

                        Wire Sizing Throughout the System
                        
                        | Connection | Wire Size | Purpose |
                        |------------|-----------|----------|
                        | Battery-to-battery ground | 4/0 AWG welding cable | Minimal voltage drop |
                        | Battery-to-inverter | 3/0 AWG welding cable | High current capability |
                        | Inverter-to-AC distribution | 6/3 cable | AC power distribution |
                        | Inverter-to-DC distribution | #2 AWG | DC loads |
                        | AC outlets | 12/3 (20A) or 14/3 (15A) | Standard household |
                        | DC appliances | 18AWG–12AWG | Lights, fans, etc. |
                        
                        

                        Key Components
                        
                        

                        • Inverter/Charger: Victron MultiPlus 3000
                          • $1,300
                            
                            • Batteries: 4× Battle Born 100Ah
                              • $4,000
                                
                                • Solar Controller: Victron MPPT
                                  • $700
                                    
                                    • Solar Panels: 3× 175W panels, 525W total
                                      • $1,000
                                        
                                        

                                        System Monitoring
                                        
                                        Victron's VictronConnect app provides real-time monitoring:
                                        

                                        • Battery state of charge
                                          
                                          • Solar production
                                            
                                            • Power consumption
                                              
                                              • Historical data
                                                
                                                This visibility is crucial for managing power usage and ensuring the system stays balanced.