# Cerbo 2 cables connected in the same relay

**URL:** <https://community.victronenergy.com/t/cerbo-2-cables-connected-in-the-same-relay/54258>\
**Category:** DIY\
**Tags:** bmv, beginner, cerbo\_gx\
**Created:** [2 March 2026 18:40 UTC](https://community.victronenergy.com/t/cerbo-2-cables-connected-in-the-same-relay/54258 "2026-03-02T18:40:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![thiagoferraz](https://avatars.discourse-cdn.com/v4/letter/t/f05b48/32.png) [@thiagoferraz](https://community.victronenergy.com/u/thiagoferraz)\
**Post date:** [2 March 2026 18:40 UTC](https://community.victronenergy.com/t/cerbo-2-cables-connected-in-the-same-relay/54258/1 "2026-03-02T18:40:03Z")

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i have **two completely separate systems** , each with its own battery bank.  
Both systems are connected to **one Cerbo GX** , and i want the **same generator** to start when _either_ battery bank needs it.

Right now:

- The **right‑side system** (MultiPlus II battery) _does_ start the generator, with the conditions i set.

- The **left‑side system** (BMV + SmartShunt) is _visible_ to the Cerbo, but the Cerbo **ignores it** for generator start. Is possible to connect a cable in the relay of the BMV-700 and connect it with the relay in the cerbo?

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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:** [3 March 2026 00:43 UTC](https://community.victronenergy.com/t/cerbo-2-cables-connected-in-the-same-relay/54258/2 "2026-03-03T00:43:48Z")

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you can use a cable to connect the relay in the BMV in parallel with the relay in the Cerbo, so if either relay closes, the gen will start.