GRUNDIG WiFi Battery Monitor with Shunt, 600A, 2.4" Color Display, App Remote for 12V-100V RV, Solar, Marine, LiFePO4 & Lead-Acid - 0-400A

I. About GRUNDIG Shunt Battery Monitor A voltmeter only guesses. The GRUNDIG Shunt Battery Monitor measures the actual energy flowing in and out of your battery bank through a precision all-copper shunt, so your state of charge stays true — even after a lithium upgrade or a long boondocking weekend. Check voltage, current, power, capacity (Ah & %) and estimated time remaining on the 2.4" color screen, or on your phone from anywhere via Bluetooth, WiFi or cloud remote. Compatible with any 12V–100V battery — LiFePO4, NMC lithium, lead-acid (AGM/Gel/Flooded) — for RV house batteries, off-grid solar, marine and golf cart systems. No more wondering if you'll make it through the night, and no more dash gauges that lie after a battery swap. II. Features & Applications Monitor from Anywhere Bluetooth for nearby checks (works offline), WiFi for your local network, and cloud remote for worldwide monitoring. Inside the RV or a thousand miles away — your battery data is always with you. Precision Measurement, Both Directions Shunt-based coulomb counting. Voltage (±0.5% + 0.02V), current, power, capacity (0.001Ah resolution), and estimated time remaining — refreshed 5 times per second. Automatically shows charging (A+) or discharging (A−); when both happen at once, it displays the net current. Smart Adjustable Alarms Set your own low-voltage and low-capacity thresholds in the app or on the display. When triggered, the built-in buzzer sounds and a pop-up appears — so you never over-discharge your bank. Power-Off Memory All settings and accumulated data are preserved through power loss. When power returns, the meter resumes with your previous configuration — set it once and forget it. All-Copper Shunt, Ultra-Low Drain High-purity copper shunt with protective housing delivers low resistance, minimal heat and accurate readings. The display draws just 0.9W — it won't meaningfully drain your battery. Powerful App (Junce Home) Animated charging interface, real-time and historical data, alarm thresholds, screen settings, and multi-device management — one dashboard for all your GRUNDIG monitors. Free for iOS and Android. Where It Works RV house battery banks (12V / 24V / 48V) — motorhomes, travel trailers, camper vans Off-grid & hybrid solar energy storage Marine & boat electrical systems Golf carts & utility vehicles Portable power stations Electric tricycles, motorcycles & conversion vehicles III. Choose Your Model Pick a rating above your system's maximum continuous current for a safety margin. 0–50A — up to 5 kWCurrent resolution 0.001A · accuracy ±(0.2% + 0.002A) · screen wakes at ≥15mA dischargeFor portable power stations, e-bikes, golf carts, small campers 0–100A — up to 10 kWCurrent resolution 0.001A · accuracy ±(0.2% + 0.002A) · screen wakes at ≥15mA dischargeFor mid-size RV house banks, boats, small solar systems 0–400A — up to 40 kWCurrent resolution 0.01A · accuracy ±(1% + 0.1A) · screen wakes at ≥30mA dischargeFor large RVs, off-grid solar storage, commercial vehicles 0–600A — up to 60 kWCurrent resolution 0.01A · accuracy ±(1% + 0.1A) · screen wakes at ≥30mA dischargeFor heavy-duty off-grid systems, large battery banks, high-power EVs IV. Specifications Shared by All Models Sampling method: shunt (all-copper, with protective housing) Voltage: DC 10–100V · resolution 0.01V · accuracy ±(0.5% + 0.02V) Capacity: 0–100% display · 0–9999.9Ah range · resolution 0.001Ah Power resolution: 0.0001W Sampling rate: 5 readings per second Current direction: bidirectional, auto-detect (charge A+ / discharge A−) Display: 2.4" HD color LCD, dark/light modes · power draw 0.9W Screen auto-off: 10s / 20s / 30s / 40s / 50s / 60s / AUTO Connectivity: Bluetooth + WiFi LAN (2.4GHz) + cloud remote Range: Bluetooth up to 33 ft / 10 m · WiFi up to 33 ft / 10 m from router · cloud remote worldwide Alarms: low voltage + low capacity, buzzer + pop-up, adjustable Data retention: power-off memory with auto-restore App: Junce Home, free for iOS & Android Compatible batteries: LiFePO4, NMC lithium, lead-acid (AGM/Gel/Flooded), any 10–100V Operating temperature: −20°C to 60°C / −4°F to 140°F What's in the Box Display Unit × 1 All-Copper Shunt with Protective Housing × 1 (rating matches your selected model) Communication Cable, 16.4 ft / 5 m × 1 Red Positive Cable, 3.3 ft / 1 m × 1 Quick Start Guide × 1 V. Installation Notes Installation should be performed by a qualified person familiar with battery electrical systems. The shunt installs on the battery's negative line; all loads and chargers must connect through it. Always disconnect power before installation or maintenance. Full wiring diagrams are included in the Quick Start Guide. VI. FAQ Q1: What's the difference between a shunt battery monitor and a voltmeter? A voltmeter estimates charge from voltage, which is unreliable — especially with LiFePO4's flat voltage curve. A shunt-based monitor measures actual current in and out (coulomb counting), so your state of charge stays accurate. Q2: How