Introduction
The ThermokSolar-4A is 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.
Pictured above: Front and back of ThermokSolar-4A, with RS-232 and counter options
Applications
The ThermokSolar can be used in both Solar Hot Water and Solar Hot Air configurations. Click here for diagrams illustrating these applications.
Live Internet Data
APRS World offers our 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 going on site.
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 |
| Power |
| 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, 4 position |
| Data compatible with our World Data internet service |
| 9600 to 57600 baud |
| Can enable / disable Morningstar Tri-Star based on temperature |
| Physical |
| Mounts in double gang electrical box or panel |
| 3.7cm (1.45”) deep |
Pricing and Purchasing
Now you can purchase these products directly through our sister website: 
ThermokSolar-4A starter package
$240.00 USD
ThermokSolar-4A, module only
$220.00 USD
ThermokSolar-4A module only. Provided with four #6-32 machine screws and KL nuts. Packaged in pink anti-static bubble bag. No accessories provided.
ThermokSolar-4A, module only, with RS-232 and counter options
$250.00 USD
ThermokSolar-4A module only. Includes RS-232 port and counter input port. Provided with four #6-32 machine screws and KL nuts. Packaged in pink anti-static bubble bag. No accessories provided.
ThermokSolar Accessories and Replacement Parts
LiPo+ battery for ThermokSolar
$20.00 USD
Required for operation of ThermokSolar directly from PV panel. These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cell outputs a nominal 3.7V at 860mAh. Comes terminated with a standard 2-pin JST connector - 2 mm spacing between pins.
Thermistor, NTC, 10k, #6 ring terminal, 152 mm (6 in) long
$4.00 USD
10k ring terminal thermistor. Manufactured by Ametherm as part number PANR 103395-408. A data sheet is available.