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MDC OFF-GRID extreme XT12HR - Storage & Maintenance; Turning off the Battery for Long-Term Storage

MDC OFF-GRID extreme XT12HR
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The battery system is designed to operate with high-current charging sources, ensuring that the heater functions properly
when required. As long as the charge current remains
stable and above 15A, the heater will activate as needed to maintain
proper battery temperature. There is
no risk of heater cycling due to insufficient charge current, and users do not need to
manually disable the heater under normal operating conditions.
Storage & Maintenance
Turning Off the Battery for Long-Term Storage
When storing your trailer for an extended period, it is recommended to turn off and disconnect the battery to prevent
unnecessary power consumption, eliminate parasitic loads, and ensure battery longevity. Follow these steps to properly shut
down and prepare the battery system for storage:
Steps to Turn Off the Battery
1. Turn off all charging sources (shore power, solar, and DC-DC charging from the tow vehicle).
2. Set the battery disconnect switch to OFF (red position) to physically isolate the battery and prevent abnormal operation
during shutdown.
3. Press and hold the Power Button for 3 seconds on any battery.
4. The Battery Level Indicators, Battery Status Indicator, and Heater Status Indicator will begin flashing rapidly, indicating
that the battery is shutting down. The
color of the Heater Status Indicator at this stage reflects its current setting.
5. Once all indicators turn off, the battery has successfully shut down.
Disconnecting the Battery
1. After shutting down the battery, disconnect the grey 350A Anderson plugs to isolate the battery bank from the system.
2. If required, also disconnect any additional power cables to ensure complete electrical isolation.
3. Store the disconnected battery in a dry, temperature-controlled environment within the recommended storage
temperature range (-4°F to 113°F / -20°C to 45°C).
If the Battery Level Indicators, Battery Status Indicator, and Heater Status Indicator continue flashing rapidly, the battery
have not fully shut down. Ensure that all system loads are disconnected before attempting the shutdown procedure again.
Once the battery is shut down, disconnect the grey 350A Anderson plugs to fully isolate the battery bank from the system
before placing the trailer in storage.
Charge the battery to 30-50% capacity before long-term storage to prevent deep discharge damage.
Recharge the battery every 3-6 months during storage to maintain their health and prevent excessive self-discharge.
When bringing the RV out of storage:
1. Reconnect the battery and ensure all connections are secure.
2. Set the battery disconnect switch to ON (green position) to allow charging and system monitoring.
3. Follow the Battery Activation & Initial Use procedure to wake the battery before operation.

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