Description
xCyrix-Li-charge 24/48V-120A Intelligent Charge Relay
The Cyrix-Li-charge 24/48V-120A is a microprocessor-controlled charge relay designed to combine a lithium battery bank with a secondary battery or charging source in 24V and 48V systems. It is aimed at professional installers working on marine, vehicle and off-grid applications where lithium battery protection and intelligent charge management are required.
Key Features
- Rated at 120A continuous current, suitable for 24V and 48V lithium battery systems.
- Microprocessor-controlled operation monitors battery voltage and connects or disconnects automatically based on charge state.
- Designed specifically for lithium battery chemistries, responding to BMS charge disconnect signals to protect the battery from overcharge.
- Combines a starter or secondary battery with the lithium bank during charging, then isolates when charging stops.
- Compact and lightweight at 0.12 kg, suitable for installation in confined spaces.
- Compatible with Victron system architectures and designed to work alongside Victron BMS products.
Product Overview
The Cyrix-Li-charge relay connects two battery banks together when the lithium battery is accepting a charge, and disconnects them when it is not. Unlike a standard voltage-sensing relay, this unit is designed to receive a direct signal from a lithium BMS charge disconnect output. When the BMS signals that charging must stop, the Cyrix-Li-charge opens immediately, preventing current from flowing into the lithium bank and protecting it from damage.
The 24/48V rating makes this unit appropriate for higher-voltage systems commonly found in larger off-grid installations, commercial vehicles and marine applications. The 120A continuous rating covers most practical charging scenarios at these voltages. The microprocessor logic ensures the relay does not chatter or cycle unnecessarily, which extends contact life and reduces heat generation at the connection point.
This relay is part of Victron's Cyrix-Li range, which is distinct from the standard Cyrix battery combiners. The Li-charge variant is specifically engineered for the charge side of a lithium system, where BMS control of the charge path is a fundamental safety requirement. It should not be substituted with a standard voltage-sensing combiner in lithium applications.
Specifications
- SKU: CYR020120430
- Voltage: 24/48V
- Continuous current rating: 120A
- Weight: 0.12 kg
- GTIN: 8719076022268
Applications
- Lithium battery systems in marine vessels requiring BMS-controlled charge isolation.
- Off-grid 24V or 48V installations combining a lithium house bank with an alternator or secondary charging source.
- Commercial vehicle conversions with lithium auxiliary battery banks at 24V or 48V.
- Motorhome and coach builds where a lithium battery must be isolated from the charge circuit on BMS command.
- Any Victron-based system requiring a dedicated lithium-compatible charge relay on the positive charge path.
What Is Included
- 1 x Cyrix-Li-charge 24/48V-120A intelligent charge relay
Installation Notes
Installation should be carried out by a qualified electrician or experienced system integrator familiar with lithium battery systems and BMS wiring. The Cyrix-Li-charge must be wired in accordance with the BMS charge disconnect output for correct operation. Incorrect wiring in a lithium system can result in battery damage or a safety hazard. Ensure all connections are correctly rated for the current and voltage of the system. For marine installations, follow applicable NMEA or flag-state wiring standards.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.