# Trailer Power Management

MT81 Security Trailers are designed to operate autonomously and be fully powered by the trailer’s included solar panel system. This article outlines best practices to ensure the system remains online and resilient in cloudy weather and during the winter months with shorter daylight hours.

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## Trailer deployment best practices

* Use the [trailer configurator](https://www.verkada.com/security-trailers/configurator/) to verify the solar panel system will provide sufficient power for your devices based on local weather patterns.

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Undersized trailers are prone to routine downtime and are not recommended.
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* **Maximize solar input:**
  * Follow section 4.7 of the [install guide](https://docs.verkada.com/docs/mt81-security-trailer-install-guide.pdf).
  * Point the trailer south.
  * Angle the panels for your region and time of year using [this calculator](https://sunsolartilt.com/pages/calculator).

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## Battery management

### Low Voltage Disconnect (LVD)

When the trailer’s battery drops too low, the system enters a Low Voltage Disconnect (LVD) mode. LVD automatically cuts the power load to preserve enough energy to resume charging when solar input returns.

If the battery falls below the minimum output voltage, it may fail to restart automatically, even when sunlight returns. In this case, you must manually restore power to exit LVD and restart the system.

### Manually restore power

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[**Connect the trailer to shore power if available**](https://help.verkada.com/security-trailer/configuration/mt81-generator-sizing)**.**

* The trailer uses a 15A charger at 120VAC. Avoid connecting other devices to the same outlet, as that could trip the fuse due to overdraw.
* If you use a generator, provide more than 3kW to prevent tripping the trailer's fuses.

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Check that the AC power source circuit breaker has not tripped if the trailer does not accept a charge.
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**Jump-start the battery with a vehicle.**

* Remove the battery case.
* Use jumper cables to connect a vehicle battery to the trailer battery terminals to restore power.
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**Perform the manual override routine.**

* Orient the trailer for maximum solar input.
* Turn OFF all circuit breakers while keeping the Main Power dial ON to reduce system load.
* Wait 30 seconds, then turn the circuit breakers back ON once the solar panel receives full sunlight.
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