AERL technical documentation

CoolMax SRX 48 V — Datasheet Rev 2.0.3

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Download PDF· Rev 2.0.3 CoolMax Datasheet

SRX

SRX 600/70‑48 · 4032 W Charge Power

AERL CoolMax SRX charge controller
600VdcMax PV input
70AMax charge current
4032WNominal @ 48 V
96.2%Peak efficiency
aerl.com.au MPPT Charge Controller · 48 V Datasheet · Rev 2.0.3 · 2026

Specifications

SRX 600/70-48

The CoolMax SRX is a Maximum Power Point Tracker (MPPT) and battery charger built on over thirty years of AERL MPPT and charging experience. High conversion efficiency, intelligent thermal management and accurate tracking make it a key component of a high-quality DC-coupled power system.

General

Weight
5.65 kg
Dimensions (W × H × D)
192 × 432 × 89 mm
Enclosure
Indoor Type 1 / IP20
Mounting
Wall mount bracket
I/O power connectors
Screw 8–35 mm²
Communications
RS485 / CAN / USB
Cooling method
Active (serviceable)
Max conversion efficiency
96.2%
MPPT tracking loss
< 0.5%
Self-consumption @ idle
3 W
Warranty
2 yr · 5 yr registered · 10 yr (Plus 5)

Battery (output)

Nominal battery voltage
24 V / 48 V
Battery voltage range
18–30 Vdc (24 V)
40–60 Vdc (48 V)
Max charge current
70 A
Nominal charge power @ 24 V
2016 W
Nominal charge power @ 48 V
4032 W
Charging method
3-stage CCCV
Temp. compensation
50 mV/°C (default)

PV input

Max PV input power
Nom × 2.0 (48 V) · × 1.3 (24 V)
Max PV input voltage (Voc)
600 V
Nominal device voltage
336 V
MPP voltage range (Vmp)
170–540 V
Min PV voltage (MPPT)
100 V
Max PV input current (Imp)
18 A
Max PV short-circuit (Isc)
25 A
Startup voltage
60 V and ≥ Vbat + 10 V
Total backfeed (Ibf Total)
0 A

Safety & environment

Overload behaviour
Power limitation
PV reverse-polarity protection
Yes
Pre-charge protection
Yes
Earth-leakage detection
Yes
Overvoltage category
DC II
Overvoltage protection
DC Type II
Safety protection class
I
Pollution degree (int. & ext.)
III
Max altitude
2000 m
Operating temperature
−20 to 50 °C
Storage temperature
−30 to 70 °C
Relative humidity
4–95% NC

High input voltage for easier installation

On-board ground fault detection

PV array oversizing up to 200% at 48 V, 130% at 24 V

Compatible with most battery systems

Reverse polarity & current protection

Built-in overload & thermal protection

Designed for long‑term reliability

Australian engineered

Engineered and supplied by

Australian Energy Research Laboratories
1/75 Bluestone Circuit, Seventeen Mile Rocks QLD 4073

Certifications

TÜV certified

Contact

1800 950 865
[email protected]
aerl.com.au