Informatie over battery disconnectors
What does a battery isolator do?
A battery isolator — also known as a battery combiner or VSR (Voltage Sensitive Relay) — automatically connects the starter and house batteries as soon as the alternator provides sufficient voltage. As soon as the engine is turned off, the combiner automatically disconnects. This way, the house battery can never drain the starter battery — you can always start.
Victron Cyrix-i — simple and proven reliable
The Victron Cyrix-i is an intelligent battery isolator that operates on voltage. It switches on as soon as the voltage on the starter battery indicates that the alternator is active, and switches off as soon as that voltage drops. The combiner kit contains everything for direct installation: the Cyrix-i relay, connection cables, and mounting hardware. Suitable for 12V and 24V systems up to 120A.
When is a battery isolator the right choice?
A battery isolator is the right choice for an older vehicle (Euro 4 or older) with a conventional alternator and an AGM house battery. It is the simplest and most affordable way to charge your house battery via the alternator — without configuration or a smartphone app.
When is a DC-DC charger the better choice?
Do you have a newer vehicle (Euro 5 or 6), a lithium house battery, or do you want to actively limit the charging current? Then a DC-DC charger is the better choice. Modern vehicles have a smart alternator that reduces the charging voltage once the starter battery is full — a battery isolator detects this as "not charging". Additionally, for lithium batteries, a battery isolator cannot provide a correct charging profile. In these cases, the Victron Orion-Tr Smart DC-DC charger offers the right solution.