---
title: How do I use the Zap Pack electrical system in my trailer?
description: "Zap Pack guide: battery disconnect, DC breaker, inverter modes, MPPT solar controller, shore power, touchscreen, troubleshooting"
---

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2. [Power & Electrical](https://academy.escapetrailer.com/support_hub/power-electrical?hsLang=en)

# How do I use the Zap Pack electrical system in my trailer?

Please take a moment to watch the video below for step-by-step guidance, or follow the step-by-step written directions.

If you need additional help, our After Sales team at Escape Trailer will be happy to assist you. You can submit a support ticket [using this form](https://escapetrailer.com/after-sales-support/). 

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**1. Locate Dinette Power Panel** 

- Start at the dinette where the main electrical panel is located.

 

**2. Battery Disconnect (Red Key Switch)**

- Purpose: Controls whether the batteries are active.
- Turn key ON (locked position) for normal use
- Turn key OFF (removable position) for storage
- If OFF: batteries will NOT charge from shore power
- For long-term storage:
  
    - Turn battery disconnect OFF
    - Also turn OFF the DC breaker (see below)

 

**3. Cold Start Button (Red Button)**

- Purpose: Helps restart system after long storage.
- Use only if trailer won’t power up after being unused.
- Cold start procedure:

Turn battery disconnect OFF

- - Turn DC breaker OFF
    - Turn inverter control (above fridge) OFF
    - Hold cold start button for a few seconds
    - Turn battery disconnect ON
    - Turn DC breaker back ON
      
          - *(If it doesn’t work, check the small blade fuse next to it.)*

 

**4. Solar Controller (MPPT)**

- Located under the battery disconnect switch.
- To view solar data on phone:
  
    - Download the Viron Connect app
    - Open app and search for your trailer name (usually last name + model number)
    - Select device
    - Enter Bluetooth PIN (on controller)
    - View live data (voltage, watts, battery status)
- Optional settings (advanced users only):
  
    - Tap gear icon → Settings → Battery
    - Choose battery type (Lithium, Lead Acid, etc.)
    - Adjust charging settings if needed
- Only trained users should change battery charging settings.

 

**5. Servo GX System**

- Connects all electrical data systems
- Sends info to touchscreen above fridge
- App is optional (not required for normal use)

 

**6. Breaker Panel (Right Side)**

- Solar Breaker (Trip Switch)
  
    - Push yellow button → disconnect solar panels
    - Use for maintenance
    - To reset: push switch back up
- DC Disconnect Breaker
  
    - Turns off all 12V DC power flow

 

**7. Smart Shunt**

- Automatically tracks battery usage and charging
- No user action required

 

**8. Inverter (Physical Unit)**

- Located in the dinette area
- Leave switch ON normally
- Controlled mainly by the panel above the fridge

 

**9. Electrical Management System (Surge Protector)**

- Protects trailer from bad shore power
- Detects:
  
    - High voltage
    - Low voltage
    - Wiring issues
- Check error codes on the box if needed

 

**10. Batteries (Under Dinette Bench)**

- Access:
  
    - Unscrew wing nuts
    - Lift cover panel
- Battery care:
  
    - Lithium batteries are wired in parallel
    - Should be removed for winter storage
- Winter storage steps:
  
    - Charge batteries to ~80%
    - Turn system off
    - Disconnect batteries
    - Store in room temperature area
- Reassembly:
  
    - Reconnect as photographed
    - Replace cover
    - Tighten wing nuts securely

 

**11. Digital Multi Control (Above Fridge)**

- This controls the inverter and shore power behavior.
- Modes:
  
    - ON mode
      
          - Converts 12V → 120V power
          - Runs appliances like fridge, AC, outlets
          - Can use “Power Assist” (combines battery + shore power)
- CHARGER ONLY mode
  
    - Uses shore power to charge batteries
    - Runs appliances only from shore power
    - Best for normal plugged-in camping

 

- OFF mode

- - Inverter is off
    - Only 12V systems work
    - No 120V power unless on gas or shore power setup

 

**12. Current Limit Setting (Important)**

- Controls how much shore power the trailer uses
- How to set:
  
    - Match outlet rating (usually 30 amps)
    - If unsure, set slightly LOWER than breaker size
- Power Assist feature:
  
    - If shore power is low (e.g., 8 amps):
      
          - Trailer uses shore power first
          - Batteries supply extra power when needed

 

**13. Touchscreen Monitor (Above Fridge)**

- Key readings:
  
    - AC Input: Power coming from shore power
    - AC Load: Power being used by appliances
    - Battery status: Voltage, charge, amps
    - DC usage: 12V systems (lights, pump, etc.)
    - Solar (PV): Solar input (0 when indoors)
- Battery signals:
  
    - Positive watts = charging
    - Negative watts = discharging

 

**Quick Summary Flow**

- Normal Use:
  
    - Battery ON
    - DC breaker ON
    - Inverter ON or Charger Only
    - Plug into shore power if available
- Storage:
  
    - Battery OFF
    - DC breaker OFF
    - Remove/store batteries (for winter)

 

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