SKU: 31561672875

Victron 140A Battery Isolator Argodiode 140-3AC | 3 Batteries

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Description

Victron 140A Battery Isolator Argodiode 140-3AC | 3 BatteriesVictron 140A Battery Isolator Argodiode 140 3AC: High Efficiency Schottky Diode Battery Isolator for Dual and Multi Bank Charging Reliable Simultaneous Charging Without Battery Interconnection The Victron 140A Battery Isolator Argodiode 140 3AC is a robust diode battery isolator engineered to enable simultaneous charging of 3 separate battery banks from a single alternator, without electrically connecting the batteries together. This ensures that

Victron 140A Battery Isolator Argodiode 140-3AC: High-Efficiency Schottky Diode Battery Isolator for Dual and Multi-Bank Charging

Reliable Simultaneous Charging Without Battery Interconnection

The Victron 140A Battery Isolator Argodiode 140-3AC is a robust diode battery isolator engineered to enable simultaneous charging of 3 separate battery banks from a single alternator, without electrically connecting the batteries together. This ensures that discharging an accessory or auxiliary battery—such as a house bank in a caravan, boat, or 4WD—will not drain the starter battery, preserving engine start capability and reducing the risk of being stranded. Unlike generic split-charge relays or basic isolators, this Victron unit uses advanced Schottky diode technology to minimise voltage drop, delivering more efficient charging and longer battery life.

Designed for 12V and 24V DC systems, this isolator is ideal for marine, automotive, and off-grid applications where reliable multi-battery management is critical. Its low forward voltage drop—approximately 0.3 V at low current and 0.45 V at rated output—reduces energy loss and heat generation, ensuring more of the alternator’s output reaches your batteries. This is a significant advantage over conventional silicon diode isolators, which can drop 0.7 V or more, leading to chronic undercharging and premature battery failure.

Advanced Schottky Diode Technology for Superior Performance

At the core of the Victron 140A Battery Isolator Argodiode 140-3AC are high-efficiency Schottky diodes, which provide a lower forward voltage drop compared to standard PN-junction diodes. This means less power is wasted as heat, and the alternator can operate closer to its intended voltage setpoint. The integrated voltage compensation diode allows you to fine-tune the alternator’s output voltage to offset the small remaining drop, ensuring batteries reach a full state of charge. This feature is especially valuable in systems where battery longevity and performance are paramount, such as in deep-cycle AGM or lithium battery setups.

Additionally, the Victron 140A Battery Isolator Argodiode 140-3AC includes a current-limited alternator energize input which is essential for modern alternators that require a DC voltage on the B+ terminal to initiate charging. Without this input, a diode isolator would block the return voltage, preventing the alternator from starting. The energize circuit provides a safe, controlled current to the B+ terminal when the engine run/stop switch is closed, ensuring reliable alternator activation.

Built for Demanding Environments

Victron’s Argo Diode isolators are constructed with a durable anodised aluminium heat sink that efficiently dissipates heat, allowing continuous operation at high currents without thermal throttling. The compact footprint—60 x 120 x 150 mm (2.4 x 4.7 x 5.9 in)—and light weight of 1.1 kg (2.5 lbs) make installation straightforward in tight engine bays or electrical compartments. Heavy-duty M8 Studs stud terminals ensure secure, low-resistance connections for high-current cables, while the 6.3 mm Faston connectors for compensation and energize simplify wiring.

All models are rated for mounting on non-flammable surfaces and are tested to withstand the vibration, temperature extremes, and salt-laden air common in marine and automotive environments. This rugged design reduces the risk of premature failure and electrical faults that can occur with lesser-quality isolators.

Key Features

  • Simultaneous charging of 3 battery banks from one alternator without interconnection
  • Low voltage drop Schottky diodes: ~0.3 V at low current, ~0.45 V at rated output
  • Integrated voltage compensation diode to optimise alternator output
  • Current-limited alternator energize input for modern alternators
  • Heavy-duty M8 Studs stud terminals for secure high-current connections
  • Compact, lightweight aluminium heat sink for efficient cooling
  • Suitable for 12V and 24V DC systems
  • Robust construction for marine, automotive, and off-grid use

Applications

The Victron 140A Battery Isolator Argodiode 140-3AC is an excellent choice for a wide range of dual-battery and multi-battery systems, including:

  • Marine vessels: separate starter and house battery banks
  • Caravans and motorhomes: charging auxiliary batteries while driving
  • 4WD and off-road vehicles: powering winches, fridges, and camping accessories
  • Commercial vehicles: maintaining separate battery systems for equipment
  • Off-grid solar systems: combining multiple charge sources without back-feed

Installation Considerations

When installing a diode battery isolator, it is important to account for the slight voltage drop across the diodes. The integrated compensation diode can be used to adjust the alternator’s voltage regulator, but in some systems, additional wiring modifications may be required. For optimal battery health and charging performance, consult the Victron ‘Energy Unlimited’ book or seek advice from a qualified auto electrician or marine installer. Proper cable sizing and termination are critical to minimise additional voltage losses and ensure safe, reliable operation.

Upgrade your battery management system with the Victron 140A Battery Isolator Argodiode 140-3AC and enjoy the peace of mind that comes with Victron’s proven reliability and engineering excellence. Whether you’re outfitting a bluewater cruiser, a remote-area tourer, or a commercial fleet vehicle, this isolator delivers the performance and durability you need to keep all your batteries charged and ready.

Shipping Notes
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SKU: 31561672875

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Lara Loves Lit
West Palm Beach, US
★★★★★ 5
Epic Adventure with FMC coming into her power
Format: Kindle
Honestly, the author, HM Wolfe had me at the dedication: “For my readers. For the ones who suffer silently. You will not break.” About: The Book of Cin takes us on a heart wrenching and inspiring journey of love, betrayal, self discovery and healing where everything Hyacinth thought she knew about the realms - and herself - is turned upside down. As she learns about her own dormant magic, she must also find her courage and make sacrifices to protect her friends as the threat of war hangs over them. My reactions: Holy smokes, this was amazing! First off, I have to say that the trauma Hyacinth experiences from the emotional and physical abuse of her narcissistic boyfriend hit hard for me. It was written so realistically, and I especially appreciate the author’s accurate betrayal of what this type of trauma does to one's self-esteem and character. Her healing journey and growth throughout the story is paced with perfection, and I found myself cheering Cin on every time she reclaimed a bit of herself and discovered newfound strengths. The sexual tension and attraction between her and Landers is the kind of slow burn you crave, and it delivers on making you more than ready for the tension to break. “The only time I want to see you on your knees,” he whispered with a low rumble, “is when those beautiful lips are wrapped around me.” How hot 🔥 is that?! “You are mine.” He said the words not with possession, but in devotion. “You do not belong to me, but I . . . I belong to you.” If you love epic adventures with found family, a morally grey MMC, magic, and an FMC coming into her own power, this needs to be added to your TBR. Oh, and did I mention, they’re dragons?!?!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 14, 2024
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sugar_jean
Lake Worth, US
★★★★★ 4
Great debut!
Format: Hardcover
“I will decimate anyone who tries to hurt you; anyone who lays a hand on you.” DV awareness History erasure Magic suppression Found family Chosen one Slow burn to spice I was happy that there’s a heavy exposure to domestic violence awareness and that Cin found the will and courage to acknowledge and get out of the abusive relationship she was in. She is really working toward taking back her voice, her choice and her power. The story covers themes of loss, betrayal and oppression as well as the power of friendship and having people truly see you. And Landers, our mmc, delicious.
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Reviewed in the United States on June 18, 2025
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The Nerdy Bookshop ✨📚✨
Birmingham, US
★★★★★ 5
Emotional & Powerful Read!
Format: Paperback, Format: Paperback
The Book of Cin by HM Wolfe was such an emotional and powerful read! As the first installment in The Stories Trilogy, it completely hooks you and leaves you desperate for more. I absolutely loved watching the FMC slowly grow into her abilities after years of abuse and struggling with her confidence. It felt raw and real in a way that stuck with me 🖤 This story has everything.. found family, betrayal, and moments of truly heart-wrenching grief. But what I loved the most was the belief that love and chosen family can help heal even the deepest, unseen wounds. Seeing that healing unfold made this journey incredibly rewarding ✨ If you love fantasy with emotional depth, an amazing magic system, character growth, and meaningful relationships, you NEED to pick this one up! 📚🔥
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Reviewed in the United States on March 23, 2026
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Mandy Jo
Carnegie, US
★★★★★ 4
Well…
Format: Kindle
I enjoyed the book, it had an interesting plot and magic system. The book is full of smirks, hissing, and crying. OMG the crying! The FMC cries from front to back of the book! I absolutely loved Daggermouth and read this book bc that, but I feel like she had a different editor maybe?! Idk what happened, but this book would have been so much better without the MMC smirking on every page that the FMC was crying on.
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Reviewed in the United States on May 29, 2026
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Asia Young
Dallas, US
★★★★★ 5
Top Book of 2024
Format: Kindle
May Contain Spoilers! Where do I even begin? I'm still in shock of how amazing this book was, how it touched my heart, and now how I have to wait for H. M. Wolfe to write the second. Because those last few chapters...went from 0 to 100 quick. So much new information, new relationships and loss, that now the tides have turned, and we NEED more. This is a fantasy book of love, loss, the power of friendship, and finding one owns strength. TBOC is about Hyacinth whose home is at Asrai’s Academy for Orphans. She was torn between the safety of home or leaving it all behind for a chance at a new life. But when a mysterious messenger appears, whispering rumors of a God among Fae, everything Hyacinth thought she knew about the Realms comes crashing down, and she must now make a new journey. This book ate me up and spit me back out. I was not anticipating the emotions I would feel within these pages. I'm talking I was laughing, then I was swooning, then I was on the edge of my seat, then I'm ready to slap someone, then I'm rooting so hard for certain characters I don't wan to stop, then my heart is broken, then I'm excited af.... it was all an emotional rollercoaster. The last few chapters contained a lot of new information, so of course as much as it doesn't leave off on a complete cliffhanger, I was over here like scraping the bottom of an ice cream cup, wanting more. The magic system starts out ambiguous, but as you continue reading you start to get more and more to build off of and start to piece together the world H. M. Wolfe created. TBOC brings in eight main characters that test alliances, grow in friendships, fall in love, become a team, and even break bonds. The friendship among the girls was everything. Ata is a spit fire, Pria is sweet yet terrifying. The banter and protectiveness these three had for one another made me want to join in with them for breakfast. I liked how there was multiple romances going on at once. Yes we have the main characters, but it just wasn't always about them, and it was great to see how others shifted and grew too. And last the romance, I've never rooted so hard for two characters. We're talking slow burn between them. In the beginning you're not sure how this is all going to play out, but Landers is a tatted, "touch her and die" kind of MMC, which who cannot love that? Hyacinth definitely had to grow within the chapters and learn how to be strong, because sometimes she was making me mad and I just wanted to step in there for her. But Landers was everything she needed and it was so well written, which is why by time you get to the end you only want more of them!
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Reviewed in the United States on September 24, 2024

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