Smart PDU Power Distribution Unit

A 19-inch rack-mount RV distribution hub: 15 individually controlled DC load channels, built-in coulomb meter for direct energy measurement, integrated water-level, temperature and tire-pressure acquisition, plus centralized charger / inverter management — with a 7-inch touch control panel and offline voice control.

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Smart PDU

Whole-Vehicle Power on One Screen

On top of a conventional distribution box's water-level, temperature and load switching, the Smart PDU integrates energy metering, charge/discharge info, charger & inverter management, tire-pressure monitoring, voice control and operation logs into one 19-inch rack hub.

Distribution Capacity

15 Channels

8×10A + 4×20A + 3×30A — independent per-channel control and status LEDs. One hub manages the whole vehicle's DC loads.

12V system, max charge 50A / discharge 70A
Dedicated 30A / 20A / 10A load connectors
Blade fuses + per-channel status LEDs, quick replacement from the service port
Cable spec: B−/P− 4AWG · B+/30A/20A 8AWG · 10A 10AWG

Built-In Coulomb Meter

0.01V / 0.01A

Energy metering integrated directly in the PDU — no separate shunt meter needed. 1 sample/second with automatic charge/discharge direction detection.

Voltage 8–24V / current 0–50A measurement
Ah 0–9999.99AH · kWh 0–9999.99kWh
Accuracy ±2% (V) / ±5% (A)
Five-layer protection: over/under-voltage, over-current, over-power, over-temp

Touch Panel + Voice

7" + Voice Control

The 7-inch TFT touchscreen shows battery state, remaining time, water levels, tire pressure and charging info; an onboard MIC enables offline voice load switching.

CAN power & communication, 169×122mm flush cutout
Historical data and error logs viewable
Voice wake-up + 15-channel voice on/off
Charger / inverter centralized management; UPS channel keeps the fridge powered

Sensing & Networking Summary

Item	Specification
Water level	TANK1–4, 4 channels (6-segment)
Temperature	T1–T2, 2 channels PT100 (-40℃ ~ 100℃)
Tire pressure	Up to 6 sensors (433MHz), IP67 / 0–100PSI
CAN ports	4 (RJ45, cables included)
Remote upgrade	Remote upgrade module (optional)

Specifications

Technical Parameters

Smart PDU Main Unit	Specification
Model	Smart PDU (19-inch standard rack housing)
System voltage	12V
Max charge / discharge	50A / 70A
Load outputs	15 channels: 8×10A + 4×20A + 3×30A (independent control)
Water level	TANK1–4, 4 channels (6-segment)
Temperature	T1–T2, 2 channels PT100 (-40℃ ~ 100℃)
Tire pressure	Up to 6 sensors (433MHz)
Display	7-inch TFT touch panel (169×122mm flush cutout)
CAN ports	4 (RJ45, cables included)
Fuses	10A / 20A / 30A blade type, top service port, per-channel status LED
Operating / storage temp	-20℃ ~ +60℃ / -40℃ ~ +85℃
Size / weight	440 × 150 × 69 mm; main unit 4kg, 7" panel 318g
Warranty	1 year from purchase (non-human-induced issues)

Built-In Coulomb Meter	Specification
Voltage	8–24V, resolution 0.01V, accuracy ±2%
Current	0–50A, resolution 0.01A, accuracy ±5%
Temperature	0–100℃
Capacity	0–100% display
Power	0–72kW, resolution 0.001W
Ah / Wh	0–9999.99AH (0.001AH) · 0–9999.99kWh (0.01WH)
Sampling rate	1 / second
Protection	Over/under-voltage, over-current, over-power, over-temp — alerts + buzzer
Smart detection	Auto charge/discharge direction detection; live battery capacity, external source and charger status

Alarm & Protection

Graduated Alarm & Protection Strategy

The system responds by severity: warnings first, safety-critical events cut loads immediately — all visualized on the panel.

Condition	System Response
Total output > 80A	Red alarm + 7 beeps (~50dB), all loads auto-disconnected
Total output 70–80A	Yellow alarm + 3 beeps; unacknowledged → yellow warning icon; auto-recovers below 70A
SOC ≤ 5%	Battery info area turns red
Water level lowest / sensor missing	Water level shown in red
Temperature > 55℃	Temperature shown in red
Battery overheating	All DC load outputs shut off, red alarm + continuous buzzer; auto-recovers when temperature normalizes
Fuse fault	Per-channel LED at the service port; replace with same-rated fuse (never increase the rating)

15 ch

Independently controlled DC loads

70A

Max discharge (charge 50A)

1 /s

Coulomb meter sampling rate

80A

Total-output protection cutoff

Standard & Optional

What's in the Box & What's Optional

The main unit and control panel are standard; water-level, tire-pressure and other sensors are optional per vehicle.

Standard	Contents
Main unit & panel	Smart PDU main unit, 7" touchscreen
Temp sensor	PT100 temperature sensor (1m cable)
Wiring kit	T25-8 lugs, connector pack (10A / 20A / 30A / sensors)
Mounting kit	Screw pack, screwdriver
Documentation	User manual, packaging box

Optional	Specification
Tire-pressure sensors	433MHz, 2.1–3.3V, response <5s, IP67, -30~+70℃, 0–100PSI, 2–3 year battery life
Threaded level sensors	150 / 175 / 200mm; BSP1 1/4 steel head, 304 stainless rod, 0–190Ω output, reed-switch sensing, -40~+75℃
Remote upgrade module	With dedicated cable, supports remote firmware updates
Fuse box	With 80A fuse
Spare fuses	10A / 20A / 30A / 80A