Victron Argodiode Battery Isolator 140-3AC - 3 Batteries - 140A enables simultaneous charging of up to three batteries from a single alternator without interconnecting the battery banks. This protects the starter battery from being discharged when the auxiliary battery (or accessories) draw power, ensuring reliable starting power while keeping auxiliary systems powered.
Why choose the Argodiode 140-3AC
- Supports charging of three separate batteries from one alternator with true isolation between banks
- Prevents accessory battery discharge from affecting the starter battery, preserving performance and reliability
- Low voltage drop thanks to high-efficiency Schottky diodes: about 0.3 V at low current and around 0.45 V at rated output
- Includes a compensation diode to slightly raise the alternator output and compensate for diode drop, helping maintain charging efficiency
- Simple installation: place the isolator in the cabling between the alternator and the batteries
- AC diode isolators feature a current-limited energize input that powers the B+ when the engine run/stop switch is closed
- Note: Inserting a diode or FET splitter can prevent return current to the B+, which may stop the alternator from charging; improper setup can result in batteries not reaching full 100% charge and aging prematurely
Usage and installation - The isolator is designed to be placed between the alternator and the battery banks. It slightly reduces the charge voltage to maintain isolation, so batteries may not reach a full 100% charge depending on system conditions.
Manufacturer: Victron Energy • Model: ARG140301020R
For returns, repairs, or support related to this product, please contact your Victron dealer.
