# Orion DC-DC Charger & LFP BMS Low Voltage Disconnect

**URL:** <https://community.victronenergy.com/t/orion-dc-dc-charger-lfp-bms-low-voltage-disconnect/56666>\
**Category:** DIY\
**Tags:** dc-dc\_charger, rv, expert, orion\
**Created:** [18 April 2026 07:50 UTC](https://community.victronenergy.com/t/orion-dc-dc-charger-lfp-bms-low-voltage-disconnect/56666 "2026-04-18T07:50:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![BipedalPrimate](https://avatars.discourse-cdn.com/v4/letter/b/5f8ce5/32.png) [@BipedalPrimate](https://community.victronenergy.com/u/BipedalPrimate)\
**Post date:** [18 April 2026 07:50 UTC](https://community.victronenergy.com/t/orion-dc-dc-charger-lfp-bms-low-voltage-disconnect/56666/1 "2026-04-18T07:50:31Z")

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Have a non Victron LFP 12v battery that does not provide Allow to Discharge (ATD) nor Allow to Charge (ATC) signals.

When the BMS triggers a Low Voltage Disconnect, the existing non Victron DC-DC charger will not charge until the LFP battery BMS has a ‘jump start’ voltage applied. (It is not a very smart BMS)

Will the Orion range of DC-DC chargers wake up a LFP battery BMS that has entered Low Voltage Disconnect and continue charging?

Cannot find anything in the various Orion manuals reviewed that addresses this question.

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**Author:** ![MikeD](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/miked/32/1522_2.png) [@MikeD](https://community.victronenergy.com/u/MikeD)\
**Post date:** [19 April 2026 00:30 UTC](https://community.victronenergy.com/t/orion-dc-dc-charger-lfp-bms-low-voltage-disconnect/56666/2 "2026-04-19T00:30:29Z")

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The Orion’s should have voltage on the output once the input voltage is present. This is implied from:-  
**The output voltage can be adjusted by approximately -**  
**15% to +25% of the default value using the**  
**potentiometer. Turn counterclockwise to decrease the**  
**voltage and clockwise to increase it.**  
**5. The output is protected against overload and short**  
**circuits, allowing converters to be connected in**  
**parallel. Always adjust the output voltage before**  
**connecting converters in parallel or connecting a**  
**battery.**  
**6. Connect the load. The converter is now ready for**  
**use.**

If there was no voltage output without a battery being connected, you would not be able to do this.