Description
Victron Cyrix Li-charge 120 – Advanced Li-ion Battery Management
The Victron Cyrix Li-charge 120 Li-ion Battery Combiner (VSR) is a premium solution for optimising Li-ion battery performance in off-grid, mobile, and marine energy systems across the United Kingdom. This intelligent battery combiner ensures safe, efficient, and automatic charging between multiple batteries while preventing overcharge and deep discharge.
Intelligent Battery Combining
The Victron Cyrix Li-charge 120 automatically connects and disconnects batteries based on voltage levels, ensuring optimal charging and discharging. UK users benefit from seamless power distribution between starter and service batteries, extending battery life and improving system reliability.
Designed for Li-ion & VSR Applications
Specifically engineered for Li-ion batteries, the Cyrix Li-charge 120 manages high-current flows up to 120A while maintaining safe and stable operation. It’s compatible with Vehicle Separation Relay (VSR) systems, making it ideal for caravans, motorhomes, campervans, boats, and off-grid solar installations in the UK.
Easy Installation & Durable Design
The Victron Cyrix Li-charge 120 is designed for both professional installers and DIY enthusiasts. Its compact, rugged construction ensures reliable performance in demanding environments, while simple wiring allows for quick and efficient installation across mobile and off-grid applications.
Optimise Your Battery System
By providing automatic Li-ion battery combining, safe high-current handling, and durable design, the Victron Cyrix Li-charge 120 maximises battery efficiency and ensures reliable operation. It is an essential accessory for UK off-grid systems, marine applications, and mobile power setups.
Detailed Specification
Product Name: Victron Cyrix Li-Charge 120 Li-ion Battery Combiner (VSR)
Product Type: Voltage Sensitive Relay (VSR) / Battery Combiner
Function:
- Automatically combines or isolates two 12V lithium-ion (LiFePO4) battery banks based on voltage thresholds
- Ensures efficient charging of auxiliary batteries from a main battery or alternator without overloading the system
- Protects batteries from over-discharge by isolating them when voltage drops below safe levels
- Ideal for motorhomes, caravans, boats, and off-grid solar systems
Key Features:
- Designed specifically for Li-ion (LiFePO4) batteries
- Fully automatic operation; no manual switching required
- Low-resistance contacts for minimal voltage drop and energy loss
- High-current capability: 120A continuous current handling
- Voltage-sensitive relay operation: closes when voltage rises above threshold, opens when voltage falls below threshold
- Reverse polarity and short-circuit protected
Electrical Specifications:
- Nominal System Voltage: 12V DC (suitable for 12.8V Li-ion battery banks)
- Maximum Continuous Current: 120A
- Peak/Surge Current: Up to 240A (short-term, <10s)
- Operating Voltage Thresholds:
- Connect Voltage: ~13.5V DC
- Disconnect Voltage: ~12.8V DC
- Voltage Drop: <30 mV at rated current
- Quiescent Current: <10 mA
Safety Features:
- Reverse polarity protection to prevent damage from incorrect installation
- Short-circuit and overcurrent protection
- Thermal shutdown in case of overheating
- Automatic disconnection to protect batteries in low-voltage conditions
Construction & Environmental Specifications:
- Rugged, vibration-resistant housing for mobile and marine use
- Compact and lightweight design for panel or compartment mounting
- Operating Temperature: –20°C to +50°C
- Designed for environments with vibrations, shocks, and moderate moisture
Connectivity & Installation:
- Direct connection to the positive terminals of both battery banks
- Manual override option for emergency situations
- Easy to install; requires proper fusing per Victron guidelines
- Suitable for use with Victron BMS for full lithium battery management integration
Applications:
- Combines main and auxiliary 12V Li-ion battery banks in caravans, motorhomes, and boats
- Ensures safe charging of Li-ion batteries from alternators, solar controllers, or other DC sources
- Off-grid or mobile energy systems requiring high-current battery combining
- Smart charging systems integrated with Victron BMS
Compliance:
- CE certified
- Complies with relevant automotive, marine, and mobile electrical safety standards
Dimensions (approx.):
- Height: 100 mm
- Width: 50 mm
- Depth: 35 mm
Weight: ~0.3 kg
Warranty: Manufacturer warranty applies; check with local supplier for details
Delivery Info
UK Standard Delivery
- Free for orders over £60.
- £3.99 for orders under £60.
- Arrives in 3-5 working days.
- Order by 2pm (Mon-Fri) for same-day dispatch.
- Your order will be shipped with Evri, DPD, or DHL.
UK Next Day Delivery
- £6.95 flat fee.
- Order by 2pm (Mon-Thurs) for next-day arrival.
- Orders placed Friday before 2pm arrive Monday.
- Excludes weekend delivery.
- Not available for postcodes: AB31-56, BF (all), HS (all), IM (all), IV (all), KA27-28, KW (all), PA20-80, PH15-50, TR21-25, ZE (all).
Click & Collect
- Ready for collection 48 hours after placing your order.
- Collect: 10am – 4pm, Monday – Friday (Excludes Bank Holidays).
- Address: Castle Farm, Holt Heath, Worcestershire, WR6 6NJ.
European Delivery
- All prices include Duty and VAT. No hidden fees.
- Free delivery on orders over €150* (€7 for orders under €150).
- *This offer applies to most European destinations.
- Your final shipping price is shown at checkout.
International Delivery
- £6.95 flat fee.
- Competitive shipping prices are calculated at checkout.
- We ship to: UK, Ireland, Germany, France, Italy, Spain, Belgium, Netherlands, Portugal, Sweden, Denmark, Norway, Finland, and Iceland.
- Some products cannot ship internationally due to weight or size.
- This includes: Cocoon Breeze, Blakedown, Discovery, melamine, windbreaks, mats, awning rails, driveaway kits, and chemical products.
FAQs
Delivery
UK Delivery
Standard UK delivery is £3.99 on all orders under £60. Orders over £60 qualify for FREE delivery.
If you need your order sooner, you can select Next Working Day Delivery at checkout for an additional £6.95 per order.
Next Working Day Delivery cut-off
To receive your order the next working day, please place your order before 2pm.
Orders placed after 2pm will be dispatched the next working day for delivery the working day after (e.g. order at 2:30pm on Wednesday = delivered Friday).
International Delivery
If you’re ordering from one of our international sites, delivery costs are calculated at checkout. We use local carriers where possible to keep prices competitive and delivery reliable.
Couriers & Tracking
Once your order has been dispatched, you’ll receive an email with your tracking information.
Standard delivery is usually within 72 hours of dispatch (excluding weekends). As a guide, an order placed on Monday should arrive by Thursday, and an order placed on Thursday should arrive by Tuesday.
If you need it sooner, you can choose Next Working Day Delivery at checkout for £6.95. Please note that next working day delivery doesn’t include weekends or Bank Holidays.
Once your order is on its way, you’ll receive tracking details so you can follow its progress via the courier’s website.
Yes — if you’d like your parcel left in a safe place, please add clear instructions in the order notes at checkout.
If your order has already been dispatched, you can usually update your safe-place preference using your tracking link on the courier’s website. Please make sure you also confirm this directly with the courier when they contact you about delivery.
We need your email address to send your order confirmation and dispatch email, including your tracking details.
Your phone number helps us contact you quickly if there’s anything we need to clarify about your order or delivery — particularly for pre-order items. We may also pass your number to the courier so they can reach you if needed while attempting delivery.
In most cases, no, you don’t usually need to stay in and wait. Our couriers will normally provide tracking updates and an estimated delivery window, and you can often leave delivery instructions (such as a safe place or neighbour) via the tracking link.
If your item is large, high value, or requires a signature, you may need to be available. Check your tracking updates for the courier’s specific instructions.
Once your order has been dispatched, we’ll email you your tracking details. You can then track your parcel at any time using the tracking number on the courier’s website.
Returns & Warranty
We want to make returns as straightforward as possible, which is why we offer a 30-day no-quibble returns policy. This gives you 30 days to return an item if you’ve changed your mind or it isn’t quite right.
Returns are at your own cost, unless the item arrives with a manufacturing fault.
Please note: we can only accept returns for items purchased directly from Caravan Auto Shop Ltd. If you bought through a retailer or marketplace, you’ll need to return the item to them in line with their own returns process.
To qualify for a return, items must be unused, in their original packaging, and in a resaleable condition. If an item is returned in a condition that doesn’t meet this criteria, a 10% handling fee may be applied.
**PLEASE NOTE - We are unable to accept items that are heavily soiled or wet. This is down to Health and hygiene reasons. If the product is received back in this state, it will be returned to you for you to return later when dry at your own cost*
Once we receive your return, we’ll process your refund within 14 days.
If your parcel arrives damaged, please take clear photos showing the condition of the packaging and any damage to the item.
Then email our customer service team with the photos and a brief description of what’s been damaged (including whether it’s the packaging, the product, or both). We’ll review it and come back to you within 48 hours to help resolve the issue.
You have 30 days from the delivery date to return your item to us. After this period, the order will no longer be eligible for a refund.
We do offer repairs, but they’re handled on a case-by-case basis. If you believe your tent or awning has a manufacturing defect, please contact our customer service team first with details (and photos if possible).
Our team will assess the issue and recommend the best solution, which may include a repair where appropriate. Repairs can only be arranged following a referral from our customer service team.
If you need a spare part, please visit our Spares pages where you’ll find the available parts for our current range. If you can’t see the part you need, contact us and we’ll do our best to help source it for you.
- Standard Caravan Auto Shop Warranty: 365 days (12 months) from the date of purchase on all Caravan Auto Shop products. Most manufacturing-related issues would typically show up before first use, which is why we always recommend checking items as soon as they arrive.
- Pre-Loved items: 30-day warranty (unless stated otherwise). We strongly advise inspecting Pre-Loved purchases within this period. If you’re not happy, you can return the item within the 30 days.
- Canvas products (purchased from 2024 onwards): Lifetime warranty on the canvas products. Our full warranty policy can be found
Customer Reviews
Caravan Awning
June 19, 2025Purchased a caravan awning in march, very good quality and value for money. Easy to assemble, no issues. Company very helpful and attentive when i had to email them. Will go back and purchase other items from this company .
Sheffield Branch
April 14, 2025Went into the Sheffield branch today to buy a drive away awning for our campervan. The service we received from Tom was outstanding, his knowledge was incredible and nothing was too much trouble for him. Well done young man it was a pleasure to do business with you
Did Some Magic This Time
January 15, 2025Close to home so a walk for most of our caravan bits. Bought virtually everything there in the last two years we have been caravanning, inc. awning and tow bar fitting. Price wise they are always competitive.
Our visit today was a step beyond the usual service we have enjoyed from them.
Tried all over the internet for a removable weather cover for our tow bar with hours of no luck, so we had a walk to shop and as it's discontinued it was looking grim. They had a look on internet and offered a makeshift solution before having the idea of searching their old parts bin just in case. Well surprised and chuffed to find they had one (think they was as well). Thanks David and Steve for the excellent customer service.
Fantastic Service
October 17, 2023Fantastic service from start to finish! Great guidance on the correct items to order and how the process works. Really appreciative of a great service and advice, parts arrived quickly and the fitter arrived at our house to do the work on the driveway as planned. Very happy with the result, thank you so much. Will definitely recommend you!
Easy From Start To Finish
March 11, 2020Ordered online and the towbar came to the house , Caravan Auto Shop was incontact to make sure it had arrived and a day for fitting.
Closer to the fitting day the fitter was in contact with a estimated time they would be here , came at time they said and took about two hours to fit towbar and wire the electrics , it all works as it should 👍
Related Products
Reviews
There are no reviews yet.