# Cyrix-ct battery combiner; can this battery combiner be forced to separate the two batteries

**URL:** <https://community.victronenergy.com/t/cyrix-ct-battery-combiner-can-this-battery-combiner-be-forced-to-separate-the-two-batteries/62360>\
**Category:** DIY\
**Tags:** rv, cyrix\_battery\_combin\
**Created:** [31 August 2026 19:18 UTC](https://community.victronenergy.com/t/cyrix-ct-battery-combiner-can-this-battery-combiner-be-forced-to-separate-the-two-batteries/62360 "2026-08-31T19:18:47Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![JHill](https://avatars.discourse-cdn.com/v4/letter/j/d78d45/32.png) [@JHill](https://community.victronenergy.com/u/JHill)\
**Post date:** [31 August 2026 19:18 UTC](https://community.victronenergy.com/t/cyrix-ct-battery-combiner-can-this-battery-combiner-be-forced-to-separate-the-two-batteries/62360/1 "2026-08-31T19:18:48Z")

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Can the cyrix-ct batter combiner be forced to separate the two batteries, by connecting Terminal 85 to ground? Connecting 85 to 30 (the coach battery in my RV) will force a combine, so will connecting it to ground prevent combining and force a separation? This is how my previous Yandina combiner worked, but I don’t want to fry my new Cyrix with a foolish experiment.

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**Author:** ![M\_Lange](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/m_lange/32/16_2.png) [@M\_Lange](https://community.victronenergy.com/u/M_Lange)\
**Post date:** [31 August 2026 19:41 UTC](https://community.victronenergy.com/t/cyrix-ct-battery-combiner-can-this-battery-combiner-be-forced-to-separate-the-two-batteries/62360/2 "2026-08-31T19:41:08Z")

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I never tried that but I think nothing would happen.

Disconnecting the ground (86?) will disengage the Cyrix immediately.

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**Author:** ![JHill](https://avatars.discourse-cdn.com/v4/letter/j/d78d45/32.png) [@JHill](https://community.victronenergy.com/u/JHill)\
**Post date:** [2 September 2026 00:46 UTC](https://community.victronenergy.com/t/cyrix-ct-battery-combiner-can-this-battery-combiner-be-forced-to-separate-the-two-batteries/62360/3 "2026-09-02T00:46:14Z")

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Thank you; that idea gives me the option to force a separation. I am worried about prolonged overcharging on the RV battery bank if I leave the combiner in auto; these are AGM batteries and the van charging system is designed for ordinary lead acid.

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**Author:** ![system](https://europe1.discourse-cdn.com/victron/original/1X/21a9a7b5db7c6339715f993568736a7053199995.png) [@system](https://community.victronenergy.com/u/system)\
**Post date:** [16 September 2026 00:46 UTC](https://community.victronenergy.com/t/cyrix-ct-battery-combiner-can-this-battery-combiner-be-forced-to-separate-the-two-batteries/62360/4 "2026-09-16T00:46:26Z")

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