Download PDF· Rev 1.0.0 CoolMax Datasheet

Battery Sense

Remote Temperature and Voltage Sensor

18–200VdcVoltage sense input

CANRJ45To the CoolMax SRX

12V / 2 AFloat output relay

0.1WIdle consumption

Specifications

Battery Sense · BAT-SENSE

The Battery Sense is an accessory for the AERL CoolMax SRX solar charge controller. Mounted beside the battery bank, it measures the battery’s temperature and its voltage at the terminals and sends them to the SRX over CAN bus, so the controller compensates its charging for temperature (factory default 50 mV/°C per bank, set in AERL Link) and monitors the battery more accurately. Use it on banks that do not report their own temperature, typically flooded or sealed lead-acid; a battery whose BMS reports its temperature over CAN, such as an AERL LiFe², needs no Battery Sense.

Battery Sense top view with the three LEDs — Top view, voltage input and termination switch sides, connector side (CAN · USB · RLY · IN). Not to scale.

Voltage input side, 18–200 V — Top view, voltage input and termination switch sides, connector side (CAN · USB · RLY · IN). Not to scale.

General

Weight: 0.25 kg
Enclosure type: Indoor Type 1 / IP20
Mounting: Double-sided adhesive tape
Voltage input connector: Screw terminals, 0.5–2.5 mm²
Terminal torque: 0.5 N·m

Electrical

Voltage input range: 18–200 Vdc
Power supply: 5 V from the SRX CAN port
Self-consumption at idle: 0.1 W
Float indication output: NO relay, 12 V / 2 A, fused
Float switch input: NO, voltage-free
Status indicators: Active, Fault, CAN activity

Communication

Interface: CAN bus (RJ45)
Maximum cable length: 10 m, CAT6
Termination: 120 Ω, switchable
Controller: CoolMax SRX

Environmental

Operating temperature: −20 to 50 °C
Storage temperature: −30 to 70 °C
Relative humidity: 95%, non-condensing
Maximum altitude: 2000 m

Temperature-compensated charging from the battery’s own temperature
Battery voltage read at the battery terminals
Float switch input and float indication relay for other chargers
Data and power over one CAN cable to the SRX

AERL reserves the right to change any product, product specifications and data without notice to improve reliability, function, or design or otherwise.

Manufactured by

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

Origin and warranty

Australian made2-year warranty

Contact

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