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The Victron Energy Cyrix-ct 12/24V 120A intelligent battery combiner parallels battery banks with near-zero voltage loss and overheating protection for $52.63 (down from $107.50) — buy online at PowerHaven Outpost and save over 50%.
Categories : Power Accessories
SKU : POW-POW-007
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Buy the Victron Energy Cyrix-ct 12/24V 120A intelligent battery combiner online for $52.63 — down from $107.50. This voltage-sensitive relay is the best-fit choice for dual-battery vehicles, boats, and off-grid systems needing automatic bank combining with a 120A alternator or charger — with virtually no voltage loss. Shop now and save over 50%, plus 12% off with coupon code OUTPOST12.
The 120A rating suits most stock and mid-size alternators (typically 80–120A output) on 12V or 24V systems. If your alternator or combined charging current regularly exceeds 120A, step up to the Cyrix-ct 230A. For most dual-battery trucks, vans, and boats, 120A is sufficient.
Both share the same intelligent trend-based switching; the difference is current capacity. Choose 120A for standard alternators and choose 230A for high-output alternators or large combined charge sources.
Mount the combiner between the positive terminals of both batteries. The Cyrix monitors voltage trends and engages automatically when charge voltage rises, disengaging when it falls — with time delays to prevent unwanted switching. Compact dimensions make mounting simple; follow the included wiring diagram and fuse both sides. Start Assist allows manual engagement for 30 seconds via a push button to jump-start from the house bank.
At $52.63 versus $107.50, you save over 50% on a premium Victron combiner backed by a 5-year warranty. Coupon code OUTPOST12 adds 12% more off; free shipping on orders over $45.00.
120A intelligent combining for 12/24V dual-battery systems with virtually zero voltage loss
Overheat protection and Start Assist keep charging safe and reliable, backed by a 5-year warranty
Save over 50% off the $107.50 compare-at price — just $52.63 — plus 12% off with coupon code OUTPOST12
Model: Cyrix-ct 12/24V 120A
Warranty: 5 years
Protection: Over-temperature disengage and auto re-engage
Product Type: Intelligent Battery Combiner / Voltage-Sensitive Relay
Start Assist: Push-button 30-second parallel engagement
System Voltage: 12V or 24V
Switching Logic: Trend-based voltage sensing with time delays
Continuous Current: 120A
Seller: PowerHaven Outpost
MPN: Cyrix-ct 12/24V 120A
Diode isolators waste charging voltage; the Victron Cyrix-ct 120A doesn't. This intelligent combiner connects your starter and house batteries only when charge voltage rises, protecting against overheating and unwanted switching — all at a $52.63 deal price.
Versus diode isolators: near-zero voltage drop. Versus basic VSRs: trend-based logic, thermal protection, Start Assist, and Victron's 5-year warranty.
Order online for $52.63, apply coupon code OUTPOST12 for 12% off, and get free shipping over $45.00.
For most stock and mid-size alternators (80–120A output) on 12V or 24V systems, yes. If your charging current regularly exceeds 120A, choose the Cyrix-ct 230A instead.
Same intelligent switching logic and protection — the only real difference is current capacity. 120A covers standard alternators; 230A suits high-output alternators and larger charge sources.
Mount it between the positive terminals of both batteries with appropriately fused cables. It switches automatically on voltage trends; add an optional push button for Start Assist manual engagement.
The sale price is $52.63 versus a $107.50 compare-at price — over 50% off. Coupon code OUTPOST12 takes an additional 12% off at checkout.
At PowerHaven Outpost — order online now with free shipping on orders over $45.00.
Installed this on my truck camper to combine the starter and house batteries. It engages and disengages cleanly based on voltage, and I've noticed zero voltage drop across the contacts. Victron quality is obvious the moment you hold it. Highly recommend.
This Cyrix-ct has been flawless for six months of off-grid camping. It parallels my AGM house bank with the starter battery whenever the alternator is charging, and never passes current through a diode, so there's no voltage loss. My solar controller also plays nicely with it. Installation took maybe 30 minutes with proper lugs. Best money I've spent on my 12V system.
The unit itself works great and the overheating protection is a nice safety net. My only gripe is that the instructions could be more detailed for beginners. Once I found some wiring guides online, setup was straightforward.
It does the job combining my two battery banks, but the default engage thresholds needed adjusting for my system. Documentation exists if you dig for it. Price was unbeatable though.
Flawless operation for a year now.
Bought this to replace a cheap Amazon relay that kept sticking. The Cyrix engages smoothly and I can hear it click in a few seconds after the alternator starts charging. Two seasons on my boat and no issues at all.
I'm 68 and not as nimble under the hood as I used to be, but wiring this combiner was manageable in an afternoon. The terminals accept heavy gauge cable securely. It's been quietly doing its job ever since, keeping both banks charged on my motorhome. You get what you pay for, and this is the good stuff.
Mine showed up rattling like something was loose inside. Replacement ordered, hopefully just a one-off shipping issue.
Upgraded from a solid-state isolator that dropped almost half a volt to this Cyrix. Charging voltage at my house bank is now essentially the same as at the alternator. My batteries charge faster and run cooler. Should have switched years ago.
Compact, well built, and the bi-directional combining works perfectly for my van's alternator-to-lithium charging. The 120A rating handles my setup with headroom to spare. Would buy again.
Sits under the hood and just works. Both battery banks stay topped up, it protects itself if things overheat, and I haven't thought about it once since installing. That's exactly what you want from a component like this.
