Victron Smart Battery Shunt Bluetooth Monitor
$159
Key Specs
| max-current | 500A |
| voltage-range | 6.5-70V |
| connection | Bluetooth |
| weight | 0.7 lbs |
| cable-length | N/A |
| warranty | 5 years |
Pros
- ✓ Industry-leading coulomb-counting accuracy
- ✓ VictronConnect Bluetooth app with rich historical graphs
- ✓ Compatible with all battery chemistries including LiFePO4
- ✓ Compact form factor — shunt only, no bulky display head
Cons
- ✗ Requires a smartphone or tablet for all monitoring
- ✗ Higher price than basic LCD monitors
Detailed Review
Overview
Victron Energy’s Smart Battery Shunt represents the state of the art in compact battery monitoring. Rather than bundling a display head with the shunt, Victron lets your smartphone do that work through the free VictronConnect app. The result is a cleaner installation with no display wiring to route, and a richer monitoring experience than any fixed LCD could provide. This latest version improves Bluetooth range and firmware responsiveness over earlier models.
How It Works
The shunt itself is a precision low-resistance bar installed in the negative cable path. All battery current — charging and discharging — flows through it. A tiny attached electronics module measures the resulting millivolt drop thousands of times per second, integrating current over time in a process called coulomb counting. This is the same fundamental technique used by professional battery management systems in electric vehicles and is far more accurate than voltage-based SOC estimation. The Bluetooth radio broadcasts live data to any nearby device running VictronConnect.
Key Features
VictronConnect displays state of charge as a percentage, real-time current, voltage, watts, and a time-to-go calculation based on your present consumption rate. Historical graphs let you review 24 hours or more of system behavior — ideal for identifying a parasitic draw or verifying that your solar array is maintaining the bank. You can set alarms for low SOC, high voltage, or low voltage conditions that send push notifications to your phone.
Configuration lets you specify battery capacity in amp-hours, the Peukert exponent for your battery chemistry, charge efficiency, and the tail current and voltage that indicate a full charge. Victron’s documentation on these settings is thorough and well-regarded. The five-year warranty is exceptional for an electronics product.
Who It’s For
The Victron Smart Battery Shunt is the right choice for anyone building or upgrading a serious off-grid, marine, or van conversion system who wants the most accurate SOC data available and is comfortable with app-based monitoring. It pairs naturally with other Victron components — MPPT charge controllers, inverter-chargers, and the Cerbo GX — but works equally well as a standalone monitor on any system. If you need a physical display, pair it with a Victron GX Touch or consider a wired LCD monitor instead.
