Solar Glazing and Panels
Sun-Lite® Glazing Material
Sun-Lite® Prefab Glazing Panels
Sun-Lite® Shoji Panels
Aerogel® Super Insulated Skylights  Vinyl Pane 8 mil Window Material

Greenhouses and Solariums
Build Your Own Solar Room

Solar Storage
Thermal Storage Tubes

Solar Hot Water Heating
SOL 27 Solar Collector
Solar Storage Tanks
Complete System Packages
Differential Controls

Solar Air Heating
Sun-Lite® Solar Airheater Kit

Window Insulation and Shading
Warm Window Roman Shade System 
Window Shading

Fans and Controls
Fans, Blowers, Thermostats 

Solar Pool Heaters

Misc. Related Products
Solar Gardening

Aerogel For Sale

Solar Controls


Goldline GL-30 Differential Control #16760

The GL-30 is the newest generation of solar differential controllers. It is field adjustable, accepts 115 VAC or 220 VAC. Hardwire.

Key Features

  • Adjustable "on" differential (8 to +25 degrees F)
  • Adjustable high limit shut-off (105 to 212 degrees F or of
    is standard equipment
  • Provides 24 VAC power
  • UL Listed
  • E.S.D., E.M.I., and R.F.I. protected
  • Utilizes 10K ohm sensors
  • For all Closed Loop, Open Loop, Drain Back, Drain Down, and Air systems.

Download the GL-30 Manual



Goldline GL-30-LCO  Differential Control #16762

Same as GL-30 above but with line cord and outlet for pump or fan.



SB Sensor #08550

10K sensor for use with Goldline GL-30 control above. Flexible copper for bolt on or strap on installation.

$ 15.00



Stiebel-Eltron SOM 6 Plus Differential Control #14499

The Stiebel-Eltron SOM 6 controller for standard solar thermal systems. The SOM 6 controller provides a clear operating concept and is equipped with the newly developed illuminated combined display with system-monitoring. Flashing symbols for sensors, pumps and valves enable an immediate allocation of temperatures, temperature differences and active actuators.

  • Illuminated system-monitoring-display
  • Includes 2 temperature sensors
  • Function control

Download the SOM 6 Plus Manual