12V solar panels charging kits for caravans, motorhomes, boats, yachts, marine

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Solid German kit with quality fittings & case. Very pleased.

Derek (Billingshurst, West Sussex, UK) - June 2017

We are a trusted supplier to thousands of UK clients

We are a trusted supplier to thousands of UK clients

DC to DC Battery Chargers

Victron Cyrix-ct 120A 12/24V Intelligent Battery Combiner

Victron Cyrix-ct 120A 12/24V Intelligent Battery Combiner
Victron Cyrix-ct 120A 12/24V Intelligent Battery Combiner

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Ex. VAT £49.99
Inc. VAT £59.99
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Photonic Universe is an official distributor of products from Victron Energy - the globally renowned manufacturer of high-quality hybrid power electronics. Victron Energy products have a longstanding reputation for their outstanding reliability, innovative design and superior build quality.

This 120A Victron Cyrix-ct intelligent battery combiner automatically connects and disconnects two independent battery banks based on voltage trends, optimising the sharing of power between batteries. This is perfect for vehicle battery systems where alternator charging can be shared with the leisure battery, and leisure charging (such as solar power or mains hook-up) can be shared with the engine starter battery.

Key Features

  • Intelligent monitoring and tracking of both battery systems, shares charging without over-discharging either battery
  • Full protection against over-discharge, overcurrent, over-temperature or over-voltage
  • Automatic 12V/24V system voltage detection
  • No loss of voltage between batteries
  • Bi-directional power flow shares charging in both directions
  • Start Assist manual override, allows leisure battery to assist with engine start-up in case of starter battery damage or deep discharge


Note: both battery banks in the system must have the same rated voltage. Smart alternators in Euro 6 or later engines may not be compatible with Voltage Sensing Relay technology such as this battery combiner.

Click on the 'Details and Specifications' tab for more information about this product.



  • Continuous current: 120A
  • Cranking current (5 secs): 180A
  • Standby consumption: <4mA
  • Rated voltage: 12V / 24V
  • Terminal size: 8mm
  • Dimensions: 46 x 46 x 80 mm
  • Weight: 110g


This product is covered by a 5 year manufacturer warranty. For more information please refer to our Terms and Conditions.



This battery combiner should be installed between the positive terminals of the two batteries or battery banks. The two positive cables should be wired into the corresponding bolt terminals located on the unit with appropriate fuses. The negative terminals of the two batteries should either be directly linked or connected through the negative common ground if it is already used in the system (such as a boat hull or vehicle chassis). The battery common negative should be connected to the battery combiner negative input using a thin cable (not provided).

Full details explaining wiring and operations can be found in the user manual supplied with this product.

If you need help with installation or have any technical questions we can provide FREE support - please contact us by email or phone (see Contact Us page for more information).