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Cellular

GOES

900MHz

Teledesign TS4000 900MHz UHF/VHF

eTracker
True cloud-based sensor configuration, logging, reporting and data analysis all-in-one.

Bluetooth

Shark (RS232/RS485 Bluetooth Serial Adapter)

Software

Stevens-Connect
A cloud-based interface to configure hardware, visualize data, analyze measurements, manage alarms, calculations, and set up data routing.


MEASUREMENTS TO MIND (M2M) is a growing suite of Stevens products that embraces cloud-computing with an all-inclusive vision of shortening the communication path from the sensors to data on-line. That is, what the sensors MEASURE the MIND sees.


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Power

SOLO (smart SDI-12 power manager)
JL-2 (solar charge controller)
Batteries
Power Supplies
Solar Panels

SOLO
Smart SDI-12 power manager that also provides remote power cycling.


The product finder lets you explore our catalog visually and filter products by type of monitoring, manufacturer, and more.


The product finder lets you explore our catalog visually and filter products by type of monitoring, manufacturer, and more.


JL-2 Solar Charge Controller

Part # 70009

JL-2

The Stevens JL-2 is a temperature compensated, tapered charge controller that has been independently tested and proven to extend the performance life of a battery beyond leading regulators. The JL-2 has set-point adjustable float chargers that can be used with PV arrays or power supplies having power ratings as high as 40 watts (higher panel wattage can be handled under controlled conditions).

The regulator features low current consumption (typically less than 50 microamps), and battery temperature sensing and compensation. The optional external temperature sensor is held in contact with the battery case via an 8 foot cable. The float threshold is adjustable between 11 and 16 volts via a trimpot. The float level of the regulator changes by approximately -23 mV/degree C; colder temperatures causing a higher float level.

The JL-2 charge controller will charge a fully discharged battery at the full current output of the solar panel and will automatically taper the charging current to zero as the terminal voltage of the battery approaches the float level of the charger. The JL-2 then provides the required trickle current to maintain the battery at the float level, assuming sufficient sunlight.

An LED is illuminated from the solar panel current signifying ample current for battery charging and proper operation of the regulator.
The automatic current charge management and temperature compensation feature ensures the battery will not be damaged by overcharging and will increase the battery’s performance life.

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Technical Specifications

Power

Max. inut voltage

28 V

Max. charging current and/or power dissipation

4 A
JL-2 will handle 10 A if the power dissipated by the controller does not exceed 15 W.

Solar panel wattage

40 W

Operating current consumption

50 µA

Environmental

Operating temp range

-50° C to +50° C

Compensation

-23 mV / °C

Storage temp range

-55° C to +85° C

Physical

Dimensions

4.8” x 3.0” x 1.6”
(120 mm x 76 mm x 3.9 mm)

Weight

0.46 lbs (210 g)