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The ARCO ST500 Shunt is a high-quality precision shunt designed for accurate current measurement in marine and industrial applications. With a 500A/50mV rating, this shunt enables precise monitoring of electrical systems by converting high currents into a measurable voltage drop. Built for durability and reliability, the ST500 is crafted from top-grade materials to ensure long-lasting performance in harsh environments.
✅ High Accuracy – Provides precise current measurement for battery monitoring and system diagnostics.
✅ Robust Construction – Built to withstand demanding marine and industrial conditions.
✅ Easy Integration – Compatible with a variety of monitoring systems and meters.
✅ Compact Design – Space-saving form factor allows for flexible installation.
✅ 500A / 50mV Output – Ensures consistent and reliable readings.
Ideal for marine, automotive, and off-grid power systems, the ARCO ST500 Shunt helps ensure efficient power management and system protection.
Accepts 8mm or 5/16" wire lugs.
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200 14th Avenue Southeast, St. Petersburg, FL 33701
7C San Bartola Drive, Saint Augustine, FL 32086




Lots of wiring - no leaks! Be sure to run ALL the wires through BEFORE completing the run!
Installed on Yanmar 4JH57 engines with Zeus Controllers - HOLY WOW power. Losing some power at top end but overall very satisfied. Will do a long term review later. Talk about power - hope to never need my generator again!
We bought these boots in 2022, and are buying new ones 3 years later. We love the design and the fact that they are easy to remove for inspection of the rig.
Review for electrical system components:
• Victron Lithium Battery 24VDC 300Ah NG Smart LifePO4 (x4)
• Victron Lynx Smart BMS 500 NG (M10)
• Victron Lynx Distributor w/M10 Terminals (x2)
• Victron MultiPlus-II 24/5000 120-95 120V (x2)
• Victron Phoenix Smart IP43 Charger 24/25 (1+1) 120-240VAC (x5)
• Victron Cerbo GX MK2 w/ Victron GX Touch 70 Flush Mount Display
• Z Bar - Class T battery link Bundle w/ Blue Sea 5119 300AMP Class T Fuse (x4)
• Victron Orion XS 1400 DC-DC Battery Charger (x2)
• Victron SmartSolar MPPT Charge Controller - 100V - 30AMP - UL Approved (x4)
Complete upgrade of my Irwin 54 Sloop electrical system –
Phase 1 – Remove 9KW generator, install 30KW LifePO4 battery system, inverter chargers, battery chargers, etc. wired for worldwide shore power capability to ABYC standards. Installation made possible with guidance and support from Andre Cormier and The Yacht Rigger.
I was amazed with the product especially, the attention to detail. I was also very pleased with the help and recommendations I received from Chris Wilcher. He made the purchase very easy.

