DC Air Conditioner for Outdoor Hybrid Off-Grid Solar Systems (-48VDC)

Full-inverter -48VDC air conditioner for outdoor hybrid off-grid solar stations. Battery cabinet cooling at 25–28°C, soft start, high airflow, RS485/Modbus.IP55 level

Outdoor hybrid off-grid stations commonly combine solar PV, diesel generator backup, and a lithium battery system. In these sites, the DC air conditioner is primarily used for battery cabinet temperature control, keeping the battery compartment stable at 25–28°C to support battery performance, reliability, and service life—especially in harsh environments such as the outback (high ambient temperature, strong sunlight, dust, and remote maintenance conditions).

This is a true industrial full-inverter DC air conditioner, fundamentally different from modified residential units. It is engineered for large airflow, low enthalpy difference, and a high sensible heat ratio (SHR)—optimized to remove sensible heat from batteries and power electronics efficiently.

Typical Hybrid Station Configuration

A hybrid off-grid outdoor station may include:

• Solar PV array (primary energy source during daytime)

• Lithium battery energy storage system (BESS / battery bank) (main supply for night and low-sun periods)

• Diesel generator (backup and battery charging support)

• DC power distribution for telecom or industrial loads

In many deployments, the battery cabinet may also house power electronics such as DC/DC modules, chargers, rectifiers, and controllers—adding continuous internal heat and increasing the need for stable cabinet cooling.

Primary Application: Battery Cabinet Temperature Control (25–28°C)

The main goal of the DC air conditioner in hybrid sites is stable battery thermal management, not comfort cooling.

Recommended control target:

• Battery compartment temperature: 25–28°C

• Typical setpoint: 27°C with a 1–2°C control band to reduce frequent cycling

Why this matters:

• Stabilizing battery temperature reduces thermal stress and helps maintain consistent charging/discharging behavior.

• Preventing hot spots improves long-term reliability in outdoor and remote conditions.

• Controlled temperature supports safer operation under high ambient temperatures and strong solar radiation.

Key Features (Industrial DC Full-Inverter Design)

-48VDC Power Supply for Hybrid/Telecom DC Systems

• Input power: -48VDC ±20%

• Designed to operate reliably on battery/rectifier DC buses commonly used in hybrid energy stations.

Soft Start (No Voltage Shock)

• Soft-start operation minimizes DC bus disturbance during startup.

• Helps protect batteries, rectifiers, and sensitive controllers from voltage dips caused by inrush current.

PID Intelligent Control

• PID main controller enables precise temperature regulation and stable operation.

• Supports smooth inverter modulation instead of frequent ON/OFF cycling.

High Airflow, High SHR Cooling

• Large airflow and high sensible heat ratio (SHR) are optimized for cabinet loads (batteries + power modules).

• Low enthalpy difference design focuses energy on removing sensible heat efficiently.

DC Centrifugal Fan (High Static Pressure)

• DC centrifugal blower delivers strong airflow and higher static pressure.

• Better suited for sealed cabinets with filters and duct resistance (dusty outdoor environments).

DC Rotary Compressor + R134a Refrigerant

• DC rotary compressor supports variable-speed (inverter) cooling.

• R134a refrigerant is applied for stable cabinet cooling performance.

Optional Monitoring & Alarms (Recommended for Remote Sites)

• RS485 / Modbus RTU communication (optional)

• Alarm dry contacts (optional): fault, high temperature, fan/compressor alarm, door/filter status (as required)

  
  

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  PID Intellgent Control

  

  RS485 Communicaiton

  

  IP55 Level

Typical Applications (A / B / C)

A. Remote Telecom Hybrid Sites

Outdoor telecom cabinets and power cabinets powered by PV + battery + diesel backup.
The DC air conditioner stabilizes battery compartment temperature and protects power electronics in sealed outdoor enclosures.

B. Remote Microgrids / Small BESS Nodes

Small battery cabinets used as part of microgrid nodes or distributed storage.
Cabinet-level DC cooling helps keep batteries within the target thermal window and reduces local hot spots.

C. Containerised / Deployable Hybrid Power Systems

Deployable hybrid power units used for temporary or mobile sites.
DC air conditioning supports cabinet-level cooling with soft start and optional monitoring for quick deployment and remote management.

Cooling Capacity Range (Product Series)

Available cooling capacities:
300W / 500W / 800W / 1000W / 1.5kW / 2.0kW / 3.0kW / 4.0kW / 5.0kW

For small outdoor battery cabinets, the most common selection is:
500W–1.5kW

Quick selection guidance:

• 500W: compact battery cabinet, shaded/insulated cabinet, lower internal heat

• 800W: typical small outdoor battery cabinet, balanced choice for hot + dusty sites

• 1000W: battery + control/power modules in the same cabinet, stronger solar exposure

• 1.5kW: high heat load, direct sunlight, weak insulation, or higher peak ambient temperature

  
  

Installation & Use Notes for Outdoor Hybrid Sites

• Ensure good cabinet sealing to prevent dust and moisture ingress.

• Consider solar radiation and cabinet insulation—outdoor heat gain can be significant even with moderate internal heat.

• Use proper airflow organization inside the cabinet to avoid battery hot spots (recommended: defined supply/return path).

• For remote sites, monitoring interfaces (RS485/alarms) are recommended to reduce maintenance trips.

Inquiry Checklist (For Fast Recommendation)

To recommend the best 48VDC model (500W–1.5kW), please provide:

1. Cabinet size (W×D×H) and mounting type (door / side / semi-embedded)

2. Peak ambient temperature (45°C or 55°C) and sunlight exposure (shaded or direct)

3. Battery capacity (kWh) and whether power modules share the same cabinet

4. Required monitoring (RS485/Modbus, alarms)

DC Air Conditioner Photos