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ART TEC Solar DTC-1 differential controller  ART TEC Solar DTV-AT differential controller 
DTC-1  $85.00
the original 		 DTC-AT  $120.00
adjustable
see below to order

 DTC1 hookup diagram

Designed specifically for photovoltaic (PV) powered solar heating applications, these controllers operate from any 12 or 24 Volt PV panel and/or battery and switch power to a DC circulation pump.  They use standard 10K temperature sensors to sense water temperatures.  If the temperature of the water coming from the solar collector is hotter than the stored water in the tank, the pump is turned on. If the collector is cooler than the tank the pump is turned off.  What could be simpler?

These controllers will prevent the loss of stored heat when collector temperatures dip below the stored water temperature by preventing the pump from circulating cooler water into the storage tank.  This typically happens on cold sunny mornings and in the afternoon when the storage tank temperature has peaked and the sun on the collector is dropping.  The solar panel will have enough power to continue running the pump long after the collectors have become cooler than the storage tank.  At this point flat plate collectors become radiators -- effectively removing heat from your storage tank.

To read the specifications or download manuals click here

 

SECURE ORDERING

Solution Graphics

Use your credit card or PayPal account or click here for a printable mail order form.

US orders ship via
Priority Mail.
Deliver in 2-3 days		 Outside the US orders ship via
Air Express Mail or Priority International
Delivery in 5-10 days

Most orders ship the same day.
 All sales are final, no refunds or exchanges other than for damaged or missing items.

See SPECS page to learn more about these products
DTC-1 box Item Name: Solar Differential Temperature Controller
specifications
Item Number: DTC-1
Price: $85.00
For larger quantities click here
Item Name: Solar Differential Temperature Controller
specifications

 Item Number: DTC-AT
Price: $120.00
For larger quantities click here
ACCESSORIES
Item Name: Pack of 2 10K 1% NTC Thermistor with 6" Teflon insulated 24 gauge leads with #8 lug.

Item Number: T-1
Price: $20.00 (for 2 thermistors as shown)
Wall Transformer Item Name: Wall Transformer
input: 120VAC 60Hz  40W
output: 12 Volt 1.5A with 12 ft. power cord
 Item Number: WT
Price: $12.00

Operate the controller and a 12 Volt DC pump rated up to 20 Watts from AC power.
DC Solid State Relay Item Name: DC Solid State Relay
input 3.5 - 32VDC
output 12 - 480VDC @ 20A
Item Number: DCR
Price: $35.00
Recommended for pumps rated over 5 Amps (60 Watts).  Input terminals connect to output of DTC-1, Output switches power to pump.  Red LED indicator built in.
DC Solid State Relay item Name: AC Solid State Relay
input 3.5 - 32VDC
output 40/480VAC @ 10A
Item Number: ACR
Price: $27.00
Control pumps rated for 120/240 Volts AC at up to 10 Amps with heatsink.  Input terminals connect to output of DTC-1, Output switches power to pump.  Red LED indicator built in.  Should be mounted in an electrical box.