SKU: 30821840512

Victron 100A Battery Isolator Argo FET 100-3 | 3 Batteries

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Description

Victron 100A Battery Isolator Argo FET 100-3 | 3 BatteriesReliable multi battery charging without cross discharge The Victron Argo FET 100 3 100A Battery Isolator is a high efficiency battery isolator designed to charge 3 battery banks from a single alternator or a single output battery chargerwhile keeping each battery electrically separated. That separation is the key benefit: powering lights, a fridge or a winch from your auxiliary battery bank is far less likely to flatten the starter battery, helping

Reliable multi-battery charging without cross-discharge

The Victron Argo FET 100-3 100A Battery Isolator is a high-efficiency battery isolator designed to charge 3 battery banks from a single alternator or a single-output battery charger—while keeping each battery electrically separated. That separation is the key benefit: powering lights, a fridge or a winch from your auxiliary battery bank is far less likely to flatten the starter battery, helping improve vehicle reliability for touring, marine and off-grid power setups across Australia.

Unlike traditional diode splitters, this unit uses FET isolator technology to minimise voltage drop. In practical terms, more of your alternator’s output reaches your batteries, which can support better charge acceptance and shorter run times in real-world systems. It also avoids the common need to raise alternator voltage to compensate for isolator losses—particularly helpful when you’re integrating modern battery chemistries or managing longer cable runs.

Designed for touring, marine and off-grid electrical systems

This isolator suits common 12V and 24V automotive and marine power systems with 12/24V auto-ranging operation. It’s a strong fit for caravans, 4WD dual-battery installs, work utes, boats, and remote power cabinets where you want straightforward alternator charging distribution without tying battery banks together. Each output is independently isolated, so different battery banks can be charged simultaneously while remaining protected from mutual discharge paths.

Helps alternators start charging when split charging is installed

Some alternators require a sense/return voltage on the B+ output to begin charging. When an isolator is installed, that return path can be reduced—occasionally leading to delayed or no alternator start-up. This unit includes an alternator energise input to assist with alternator excitation in these scenarios, supporting stable charging behaviour when the engine run/stop circuit is engaged. This is particularly relevant in modern vehicles and certain marine alternator configurations.

Installation notes that protect performance

As with any high-current battery isolator, overall charging performance depends heavily on cable sizing, connection quality and cable length. Keeping cable runs short and selecting an appropriate conductor cross-section helps reduce voltage drop in the wiring so the benefits of low-loss FET switching are preserved. For best results, follow Victron wiring guidance and use properly crimped lugs, secure fasteners and sound corrosion protection—especially in coastal and marine environments.

Key features

  • Simultaneous charging of 3 battery banks from one alternator or charger
  • FET technology for very low voltage drop compared with diode splitters
  • Battery bank isolation helps reduce the risk of draining the starter battery from auxiliary loads
  • 12V/24V system compatibility with auto-ranging operation
  • High-current terminals for secure connections in demanding automotive and marine installs
  • Status indication to support quick checks during commissioning and fault-finding

Very low voltage drop (typically around 0.02V at low current, averaging about 0.1V at higher currents) helps maximise charging voltage at the batteries compared with diode isolators.

Alternator energise input can assist alternator start-up in systems where the alternator needs B+ voltage present to begin charging.

Build a more dependable dual-battery or multi-battery system

If you’re planning a 3-battery split-charging setup and want a proven way to distribute alternator charging while keeping battery banks isolated, the Victron Argo FET 100-3 100A Battery Isolator is a practical, low-loss solution. Add it to your setup to support cleaner power management and more confident starts on the road or at sea.

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SKU: 30821840512

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Kindle Customer
Battle Creek, US
★★★★★ 5
Recommended reading for whoever is/will applying to section 8
Format: Kindle
Good advices for those who need the government assistance. Very interesting and creative ways to successfully be granted with your vouch with the program. Thanks Mike! Well done!
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Reviewed in the United States on March 21, 2021
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Praisekitten
Grantham, US
★★★★★ 5
Great Tips & Info!!!👍
Format: Kindle
This book offered tips I will use to get my Section 8 Voucher!! Thanks Mike &All his tennents who offered up some help to those of us who felt lost and didn't know what steps to take next.
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Reviewed in the United States on November 4, 2019
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Edward Damas
Pawtucket, US
★★★★★ 3
Very Informative, but lacking in one or two areas.
Format: Kindle
I'm disabled and need a better living condition. I'm already on the waiting list for S8 and have been for the last year and a half. The book is informative, but it lacks in some areas. The author seems to think that many on disability have the option to "physically move around" doing chores and visiting offices. I'm a disabled 53 year old man, homebound and just recently lost daytime access to my little truck, only available to me during the weekends and evening hours, and when I do have it, it's rare I drive long distances. I cannot even afford to ride public transportation and have no one else to lean on for support. Also he seems to think that buying donuts/lunch for the whole office is a way in... maybe it's a way in for those that can afford it.. but not for many. Other than that.. it's worth to buy the download of the book itself.
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Reviewed in the United States on September 4, 2019
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Your Gaviota
Boise, US
★★★★★ 4
Can be useful for some.
Format: Paperback
This book is an easy read. I read it in one sitting. I found the information interesting, and not boring. Please keep in mind that everyone's situation is different, and not all tips will apply to you. I did find some points useful for future reference. If you're someone who doesn't know much about section 8 you would probably find this book helpful. Overall, I don't regret getting this book.
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Reviewed in the United States on June 5, 2020
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Hard Rock Girl
Lexington, US
★★★★★ 5
Great even if you don't use section 8
This a great book even if you aren't planning to use section 8. I learned a lot of things to go on the frugal side to save some money. This guy had 300 homes so you know he was doing something right. It was so interesting to read. Great book...I read it fast and I read it 2 times. I followed a lot of his tips.
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Reviewed in the United States on November 29, 2014

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