Description
xVictron Argofet 100-2 Two Battery FET Isolator 100A
The Victron Argofet 100-2 is a FET-based battery isolator designed to charge two separate battery banks simultaneously from a single alternator or charger, with no voltage drop across the isolator. It is suited to marine, vehicle and off-grid applications where independent battery banks must be kept isolated from one another during discharge while still being charged together.
Key Features
- Charges two independent battery banks from one input source without cross-discharge between banks.
- FET (Field Effect Transistor) technology eliminates the 0.6V to 0.7V voltage drop associated with traditional diode-based isolators, ensuring batteries receive the full charge voltage.
- 100A continuous current rating across both output banks.
- Automatic operation with no manual switching required during normal use.
- Compact and lightweight at 0.91 kg, suitable for installation in confined spaces.
- Compatible with standard alternators and battery chargers without requiring alternator modification.
Product Overview
Traditional diode isolators introduce a voltage drop of around 0.6V to 0.7V between the charging source and the battery. Over a charge cycle, this means batteries consistently receive less than the target charge voltage, leading to chronic undercharging. The Argofet 100-2 uses MOSFET technology to eliminate this drop, so the voltage at the battery terminals matches the output of the alternator or charger directly.
The isolator works by allowing current to flow freely from the input to both battery banks during charging, while blocking reverse current flow between the banks. If one battery bank is heavily discharged, it cannot draw down the other bank through the isolator. This makes it particularly useful in dual-bank setups where a starter battery and a service or leisure battery must remain independent during use but be charged from the same source.
The unit requires no external control signal or relay logic for basic operation. It is a passive device in normal use, which keeps installation straightforward and reduces potential points of failure.
Specifications
- SKU: ARG100201020
- Number of battery outputs: 2
- Maximum continuous current: 100A
- Technology: FET (MOSFET) isolator
- Weight: 0.91 kg
- GTIN: 8719076019015
Applications
- Marine vessels with separate starter and service battery banks charged from a single alternator.
- Campervans, motorhomes and HGVs requiring split-charge functionality without voltage loss.
- Off-grid systems where a charger must feed two isolated battery banks.
- Commercial vehicles with auxiliary power requirements independent of the starter battery.
What Is Included
- 1x Victron Argofet 100-2 FET battery isolator
Installation Notes
Installation should be carried out by a qualified electrician or competent marine/vehicle electrician familiar with high-current DC systems. Ensure the input and output cabling is rated for at least 100A continuous and that appropriate fusing is fitted on the input side close to the source. The unit should be mounted in a ventilated location as it will generate some heat under sustained high-current operation. Verify compatibility with your alternator output voltage and battery chemistry before installation.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.