Victron Energy Cyrix-ct Intelligent Battery Combiner, 12/24V, 120A, IP54

Overview

The Victron Energy CYR010120011R is a Cyrix-ct 12/24V-120A intelligent battery combiner for linking battery banks automatically when charge voltage is available. It works as a microprocessor-controlled relay, connecting batteries in parallel once one battery reaches the connect voltage and disconnecting again when voltage falls below the set range.

For boats with separate starter and house batteries, this helps the alternator or battery charger share charge without the voltage drop associated with diode isolators. The unit auto-ranges for 12V or 24V systems, carries 120A continuous current, has a 180A cranking rating for 5 seconds, and uses IP54 protection for installation in sheltered onboard electrical spaces.

Key features

• Automatically connects and disconnects battery banks based on voltage, reducing manual switching during charging and discharge cycles.
• 120A continuous current rating with 180A cranking capacity for 5 seconds.
• Auto-ranging operation for 12V and 24V DC systems.
• Bidirectional voltage sensing allows the combiner to respond when either connected battery is being charged.
• Start Assist function can hold the relay engaged for 30 seconds when connected to a push button or switch.
• Very low open-state current draw of less than 4 mA helps limit standby drain.
• IP54 protection category suits dry, protected marine electrical compartments where spray and dust exposure are controlled.
• Compact 46 x 46 x 80 mm housing helps with installation near battery banks, busbars, or DC distribution equipment.

Electrical and system integration

The Cyrix-ct monitors the general voltage trend rather than reacting only to a fixed instant threshold. This helps prevent unwanted relay switching when a short, high-current load pulls voltage down or when a large discharged battery bank is first connected.

Connect voltage ranges are 13.0V to 13.8V on 12V systems and 26.0V to 27.6V on 24V systems. Disconnect voltage ranges are 11.0V to 12.8V on 12V systems and 22.0V to 25.7V on 24V systems, with delay timing that changes according to the voltage level.

Installation and setup

In a typical marine installation, the alternator charges the starter battery first, and the Cyrix-ct closes once the starter battery has reached the connect voltage. The house battery, bow thruster battery, or another onboard battery bank can then receive charge through the combiner without requiring alternator output compensation for diode voltage loss.

The 120A model uses M6 connection posts with long bolts that allow more than one power cable connection where the installation permits it. The control cable is not included with this 120A version, so any Start Assist wiring should be planned as part of the installation.

Fit and onboard use

This combiner is a good match for small to mid-size boats that use separate starter and domestic battery banks and need automatic charging control from an alternator, shore-power charger, or other DC charging source. It is especially useful where simple battery separation is wanted without adding the voltage loss of a diode isolator.

The operating temperature range is -40°C to +60°C, which gives it a wide working range for protected lockers, engine-area electrical panels, and DC distribution spaces. Mount it where the terminals are protected from accidental contact and where the IP54 housing is not exposed to direct washdowns or standing water.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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