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ThermokSolar-4A, module only

1.00 LBS
Calculated at checkout

Product Description


ThermokSolar-4A Module

Off Grid Options presents the ThermokSolar-4A - a solar heating differential temperature controller for PV and DC powered applications. It is configured with four temperature sensor channels, an LCD display for real-time view and easy programming and two solid state DC relay outputs. Designed to run directly from a PV panel, the ThermokSolar-4A is unique in the industry in that it requires no outside power.

ThermokSolar-4A module only. Provided with four #6-32 machine screws and KL nuts. Packaged in pink anti-static bubble bag. No accessories provided.


Solar Hot Water Diagram


Live Internet Data

Through APRS World, LLC, Off Grid Options offers World Data service free for our customers. Using an optional internet gateway module, our products can send live data to our hosted data service. Using your web browser you can view live and historical performance data and graphs. This allows your customer to see how their system is performing and allows you to troubleshoot the system without getting in your truck.


Technical Specifications

Measurement Inputs

  • Four 10K Thermistor: Typically measure -40°C to 150°C (-40°F to 302°F), screw terminals and RJ-45 wired in parallel
  • Optional Pulse Counter: Screw terminals

User Interface

  • 16x2 Character LCD, backlit
  • Three push buttons
  • Temperatures update once per second
  • Relay / alarm status visible


  • Lithium polymer battery (included)
  • Charging input, 7 to 38 volts DC
  • Can run directly from 12 volt PV panel for batteryless and gridless systems

Relay / Alarm Outputs

  • 2 x DC relay, solid state, 6 amps @ 39 volts DC max
  • Independently programmable for:
        Differential Control
        On above temperature set point
        Off above temperature set point
        Always On
        Always Off

RS-232 Communications (Optional)

  • ASCII or binary data, selectable
  • Screw terminal, four position
  • Data compatible with our World Data Internet service
  • 9600 to 57600 baud
  • Can enable / disable Morningstar Tri-Star based on temperature


  • Mounts in double gang electrical box or panel
  • 37 mm (1.45 in) deep


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It starts with ultra tough UV stabilized Delrin™ 507 (acetal co-polymer) plastic, 304 stainless steel, and corrosion resistant anodized 5052-H32 aluminum. The internal potentiometer has 360° rotation, 355° electrical angle (5° dead-band), a machined aluminum body, and an integrated ball bearing. Besides the potentiometer bearing, there is also a precision stainless steel ball bearing. Metal Oxide Varistor (MOVs) help protect the wind vane against lightning and static buildup. All of the machining, anodizing, assembly, and testing of the wind vane is done in the USA. The wind vane comes with a rubber

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