Know Your Battery—Anywhere, Anytime
Stop guessing State of Charge. The KL-F Bluetooth Battery Monitor measures voltage, current and coulomb count up to 120 V / 600 A, pushing live data to your phone so you can protect expensive LiFePO, AGM or lead-acid banks in RVs, solar cabins, boats and forklifts.
Key Features
- 0–120 V, 100 A · 400 A · 600 A Options—choose the shunt that fits your system.
- Coulomb Counting & SOC %—accurate amp-hour tracking for true capacity insight.
- Bluetooth + Free App—configure alarms, view historical curves, push OTA firmware.
- Smart Protections—relay-driven cut-off for over-voltage, under-voltage, over-current, over-temp.
- Color-Code Current Flow—green = charging, blue = discharging at a glance.
- Self-Calibration & 0.4 W Stand-By—long-term accuracy without draining the pack.
Typical Use Cases
- Off-grid & RV solar systems—balance charge/discharge cycles on LiFePO.
- Marine & yacht house banks—avoid deep-discharge damage while cruising.
- Golf-cart / forklift conversions—monitor high-amp lithium upgrades.
- Telecom backup & UPS cabinets—24 V / 48 V SLA or LFP strings.
- DIY powerwalls & battery labs—log AH / WH for cell testing.
Technical Specifications
| Model | KL110F | KL140F | KL160F |
|---|---|---|---|
| Voltage Range | 0–120 V (self-power 10–80 V) | ||
| Current Range | 0–100 A | 0–400 A | 0–600 A |
| Resolution | 0.01 A | 0.1 A | 0.1 A |
| Accuracy | Voltage ±2 % + 3d; Current ±5 % + 10d | ||
| Bluetooth Range | ≈ 10 m / 33 ft | ||
| Sampling Rate | 1 Hz | ||
| Protections | OVP, UVP, ±OCP, OPP, TEMP | ||
| Power Draw | ≈ 0.4 W | ||
Package Contents
- KL-F Battery Monitor Display
- Matching Shunt (100 A / 400 A / 600 A)
- 4-pin & 3-pin Cables
- Temperature Sensor Probe
- Ring Terminals & Mounting Screws
- User Manual (EN)
Why Buy from MCOOH?
- 🚚 Free worldwide shipping & 30-day returns
- 🛠️ 1-year warranty · lifetime tech support
- 📦 Ships within 3 business days