100 kW PCS inverter liquid cooling unit: flat frame, six fans on top, pump and pipework visible in the lower frame

ISO 14001

ISO 45001

ISO 9001

PCS Inverter Liquid Cooling Unit (40–⁠100 kW)

For PCS manufacturers and BESS integrators: the 100 kW model rejects heat from 58 °C high-temperature loops; the 40 kW model supplies 20 °C coolant.

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Key Metrics

40–⁠100kW

Cooling

Rooftop

Mounting

3N~400V

Voltage

-30~55°C

Ambient

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Product Features

Low-power cooling

100 kW of heat rejection for 8 kW of rated power input, so cooling a high-temperature loop takes little electricity.

Low-power cooling

100 kW of heat rejection for 8 kW of rated power input, so cooling a high-temperature loop takes little electricity.

Sub-ambient coolant

Power devices that need coolant colder than the outside air take the 40 kW model, which keeps supplying low-temperature coolant on hot days.

Wide setpoint range

The 100 kW model's outlet temperature can be set anywhere between 10 and 60 °C to match the coolant inlet temperature the PCS calls for.

Rooftop mounting

Both models sit on the enclosure roof, leaving the floor inside the PCS enclosure to converter cabinets and distribution.

Cold-climate start

The 100 kW model has a heating function that warms the coolant at low ambient, so units in cold regions keep running through winter.

Roof integration

Unit and PCS enclosure are designed on one drawing set with interfaces aligned before shipment; the unit is also supplied on its own.

Product Details

PCS liquid cooling unit selection diagram against ambient: 100 kW model outlet 58 °C, 40 kW model outlet 20 °C

Outlet temperatures of the two models at 45 °C ambient: the 100 kW model above ambient, the 40 kW model below

The two models are divided by how the coolant temperature relates to the ambient air. At 45 °C ambient the 100 kW model is rated at 58 °C outlet, 13 °C above the air, so its heat passes through the heat exchanger and fans straight to the atmosphere. The 40 kW model supplies 20 °C coolant, 25 °C below the air, which takes compressor cooling and 17 kW of rated power input. Which one fits depends on the maximum coolant inlet temperature set by the PCS manufacturer. Where the 100 kW model runs at an outlet temperature below 58 °C, its cooling capacity is calculated for the project's conditions.

Outlet temperatures of the two models at 45 °C ambient: the 100 kW model above ambient, the 40 kW model below

The outline is 1200 × 920 × 1300 mm and the weight about 265 kg, with one large fan on top and a guarded heat exchanger on the side. Coolant temperature is controllable from 10 to 30 °C, rated pressure is 2.5 bar and noise no more than 75 dB(A), on a three-phase 400 V, 50 Hz supply. It is the smaller of the two and takes about 40% of the 100 kW model's roof area.

The 100 kW model is built as a flat frame, 2000 × 620 × 1800 mm and about 400 kg, with six fans in two rows on top and the pump and pipework in the lower frame. Coolant temperature is controllable from 10 to 60 °C, rated pressure is 2.5 bar and noise no more than 85 dB(A). At -30 °C ambient its rated heating capacity is 7 kW (10 °C outlet).

The coolant is a 50% ethylene glycol solution, and supply flow is selected against the flow rate and pressure drop of the PCS cooling loop. The unit communicates over RS485, with CAN reserved, and joins PCS or EMS monitoring on a point list agreed per project. When ETENZ integrates it with the PCS enclosure, the roof mounting beams, the penetrations and the coolant piping from the roof down to the converter cabinets are drawn together, and the three-phase 400 V supply is taken from the enclosure's auxiliary distribution.

Delivery Scope Options

Scope 1

Equipment supply

Scope 1

Equipment supply

The model is selected against the heat load of the PCS power devices and the coolant inlet temperature and flow they require, then shipped as a complete unit with outline and mounting dimensions, hydraulic connection data and communication documents.

Scope Includes:

Outline and mounting dimensions

Hydraulic connection data

Communication documents

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Scope 2

Integrated with the enclosure

Scope 2

Integrated with the enclosure

Delivered with a PCS or BESS enclosure, the roof mounting beams, penetrations and their sealing, the coolant piping inside the enclosure to the converter cabinets and the auxiliary supply are designed and built together, with both sides of every interface on one drawing set.

Scope Includes:

Roof beams and penetration sealing

Internal piping and auxiliary supply

Factory installation and testing

Inquire

Specification Comparison

Detailed technical specification comparison to help you choose the most suitable model configuration

Mounting

Rooftop

Rated cooling capacity

100 (outlet 58 °C, ambient 45 °C)

Rated power input

8.0 (same conditions)

Rated heating capacity

7.0 (outlet 10 °C, ambient -30 °C)

Temperature control range

10–⁠60

°C

Rated pressure

2.5

bar

Supply flow

Confirmed per project

Coolant

50% ethylene glycol solution

Power supply

3N~400 V, 50 Hz

Ambient operating temperature

-30~55

°C

Noise

≤ 85

dB(A)

Communication

RS485 (CAN reserved)

Dimensions (W × H × D)

2000 × 620 × 1800

Weight

approx. 400

Finish

RAL7035 fine texture

Parameter	100 kW	40 kW	Unit
Mounting	Rooftop	Rooftop	-
Rated cooling capacity	100 (outlet 58 °C, ambient 45 °C)	40 (outlet 20 °C, ambient 45 °C)	kW
Rated power input	8.0 (same conditions)	17 (same conditions)	kW
Rated heating capacity	7.0 (outlet 10 °C, ambient -30 °C)	—	kW
Temperature control range	10–⁠60	10–⁠30	°C
Rated pressure	2.5	2.5	bar
Supply flow	Confirmed per project	Confirmed per project	-
Coolant	50% ethylene glycol solution	50% ethylene glycol solution	-
Power supply	3N~400 V, 50 Hz	3N~400 V, 50 Hz	-
Ambient operating temperature	-30~55	-30~55	°C
Noise	≤ 85	≤ 75	dB(A)
Communication	RS485 (CAN reserved)	RS485 (CAN reserved)	-
Dimensions (W × H × D)	2000 × 620 × 1800	1200 × 920 × 1300	mm
Weight	approx. 400	approx. 265	kg
Finish	RAL7035 fine texture	RAL7035 fine texture	-

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Product FAQs

A battery unit has to bring the coolant below ambient, which takes compressor cooling. PCS power devices accept much warmer coolant, so the 100 kW model is rated at an outlet temperature above ambient and rejects its heat straight to the air through the heat exchanger, at far lower rated power input. Where batteries and PCS share one liquid-cooled enclosure and a single unit is preferred, look at the dual-loop rooftop unit.

It comes down to the coolant inlet temperature the PCS manufacturer specifies: below ambient calls for the 40 kW model; a higher permitted inlet temperature suits the 100 kW model. When the 100 kW model runs below its rated outlet temperature, its cooling capacity is calculated for the project's conditions.

Yes. The coolant is an ethylene glycol solution, and the 100 kW model has a low-temperature heating function that warms the cooling loop in winter.

It is selected against the flow and pressure drop of the PCS cooling loop and stated per project with the quotation.

Both models are designed for the roof of a PCS or BESS enclosure. The roof mounting beams are sized to the unit's weight and fixing holes, and the penetrations with their waterproof sealing are drawn at the same time.

The unit communicates over RS485 with CAN reserved; the point list for the PCS or EMS is agreed per project.

Any liquid-cooled power electronics loop can be assessed, with the selection based on the coolant temperature, heat load and flow the equipment requires.

The heat load of the PCS power devices, the required coolant inlet temperature and flow, the site's maximum and minimum temperatures and altitude, the supply system, communication protocol and quantity, and whether the unit is supplied standalone or integrated with the PCS enclosure.