Renogy CORE 300A Battery Shunt with Bluetooth

Short Product Summary

The Renogy CORE 300A Battery Shunt with Bluetooth is a smart battery monitor that measures your battery's voltage and current and reports accurate state-of-charge straight to your phone over Bluetooth. Compatible with the Renogy ONE Core and DC Home app, it's the precise, no-guesswork way to keep an eye on your 12V power system.

Why This Product

Voltage alone is a poor guide to how much battery you have left. A shunt measures the actual current flowing in and out, so you get a true state-of-charge — essential for off-grid setups where you need to know exactly how much power remains before the lights go out.

Key Features

• 300A continuous measurement – suitable for typical 12V house systems.
• Bluetooth LE + BLE Mesh – monitor in real time via the DC Home app.
• Renogy ONE Core compatible – integrates into the Renogy smart ecosystem.
• High accuracy – current to ±1% (0.01A resolution), voltage to 10mV resolution.
• Temperature monitoring – built-in sensing across −20 to 80 °C.
• Compact & light – 134 × 97 × 31 mm, just 260 g.

Ideal For

• Caravan, trailer & camper 12V systems wanting true state-of-charge
• Off-grid and overlanding setups that need accurate battery data
• Anyone building a Renogy ONE smart power system

Local Support from 4Matt Campers

4Matt Campers serves the Western Cape and Cape Town, and ships across South Africa — helping clients build reliable 12V and off-grid power systems. We'll help you wire and set up your battery monitoring correctly.

Technical Specifications

• Brand: Renogy
• Model: RSHST-B02P300-G1-SA (CORE Series)
• Max Continuous Current: 300 A
• Voltage Range: 8–120 V DC
• Connectivity: Bluetooth LE & BLE Mesh
• App / Compatibility: DC Home app · Renogy ONE Core
• Accuracy: Current ±1% (0.01A resolution) · Voltage 10mV resolution
• Temperature Range: −20 to 80 °C
• Cabling: 2 × 1 m B+ (22 AWG) · 1.5 m temperature sensor
• Dimensions: 134 × 97 × 31 mm
• Weight: 260 g

What's Included

• 1 × Renogy CORE 300A Battery Shunt
• B+ cables & temperature sensor cable
• User manual

Optional Fitment / Upgrade Notes

For accurate readings, it's worth confirming:

• The shunt is installed on the battery negative, with all loads/charge sources downstream of it
• Your battery's capacity is entered in the app for correct state-of-charge
• Pairing with a Renogy ONE Core if you want a fixed display

Complete Your Setup

Browse the full Renogy range and 12V electrical & power gear. Pair it with a lithium battery and the right charging for a complete smart 12V system.

FAQ

Why use a shunt instead of just a voltage readout?
A shunt measures actual current in and out, giving a true state-of-charge — far more accurate than voltage alone, especially with lithium batteries.

Does it need the Renogy ONE?
No — it works over Bluetooth with the DC Home app on your phone, and also integrates with the Renogy ONE Core if you want a fixed display.

What size system does 300A suit?
It's ideal for typical 12V caravan and off-grid house systems. For very large banks, ask us about higher-rated options.