Renogy Battery Shunt 300 — Remote Battery Monitor 8–120V up to 500A with Bluetooth and Temp Probe

The Renogy Battery Shunt 300 is a high-precision current sensor and remote monitoring module that measures battery voltage, current, and state-of-charge for 8V–120V systems up to 500A.

This compact shunt pairs with the Renogy DC Home app and Renogy ONE remote to give you live and historical battery data for lead acid (AGM, GEL), lithium iron phosphate (LiFePO4), lithium-ion, and Ni‑MH batteries. It logs charge and discharge events, reports temperatures via an included sensor, and transmits readings over Bluetooth to help you understand how your battery bank is performing without being physically present at the installation.

How does the Renogy Battery Shunt 300 track battery performance?

The shunt measures current flow through a low-resistance resistor and combines that with voltage and temperature readings to calculate state-of-charge and energy throughput. It continually updates readings so you can see both instant values and accumulated amp-hours over time.

• High-precision current sensing up to 500 A continuous
• Voltage measurement across 8 V to 120 V systems
• Temperature probe for safer, more accurate capacity calculations
• Records historical charge/discharge events for trend analysis

What connectivity and remote features are available?

The module uses Bluetooth to communicate with Renogy’s DC Home app and is compatible with Renogy ONE (except Renogy ONE M1). Through the app you can view live metrics, review stored logs, and receive alerts when readings fall outside expected ranges.

• Bluetooth pairing to DC Home app for mobile monitoring
• Remote access via Renogy ONE hub (not compatible with ONE M1)
• Push alerts for abnormal voltage, current, or temperature
• Historical data export/viewing for diagnostics

Which battery types and system setups does it support?

This shunt is designed to be battery-chemistry agnostic and works with starter and house batteries commonly used in RVs, marine, off-grid and backup power systems. It supports multiple chemistries so you can monitor mixed systems or replace batteries without changing the sensor hardware.

• Compatible with lead acid varieties: AGM and GEL
• Works with lithium iron phosphate (LiFePO4) and lithium-ion batteries
• Supports nickel-metal hydride (Ni‑MH) cells
• Suitable for single-battery banks or multi-battery installations within voltage range

How is the device installed and what should I watch for?

Installation involves wiring the shunt in series with the battery negative, connecting the voltage sense and temperature probe, and pairing the unit to the app. Proper cable sizing, tight torque on terminals, and correct orientation are important for accurate readings and safe operation.

• Place shunt in the battery negative line between battery and loads/chargers
• Use appropriately rated cables and secure terminal connections
• Mount temperature probe in firm contact with battery case for best accuracy
• Confirm Bluetooth pairing and system voltage range before full use

Who is this for: The Renogy Battery Shunt 300 is aimed at DIY solar installers, RV and marine owners, and anyone running off-grid or backup power who wants precise, remote visibility into battery health and energy flow. It suits system builders who need accurate amp-hour accounting for management, maintenance, and troubleshooting, and who require compatibility across common battery chemistries. Note: not currently compatible with Renogy ONE M1; verify app and hub compatibility before purchase.