Hi I have a new version of my Solar Controller Kit for low to medium power systems. The new version uses the same circuit and PC board as my high power kit but replaces the more expensive 75 amp FET and two 8 amp shottkey diodes with a less expensive 12 amp FET and a 3 amp shottkey diode. This version also does not need the heat sink on the FET as well. I have added another couple of pages to the documentation with information on proper sizing of the battery and panel as well as a color photo of the completed board, bringing it up to six pages total.
The new low power version will work with solar panels from 3 watts to 35 watts (I include information on increasing this to 70 watts) It can charge SLA batteries from 1 amp/hour to over 100 amp/hour ratings with proper sizing of the solar panel. A 3 watt Volkswagen panel, a 1 to 3 amp hour SLA battery and this controller is perfect for a KX1 or K1. For a QRP K2 a 10 to 15 watt panel and 3-7 amp battery is ideal. This controller could even run a K2/100 for several hours per day with a 30 watt panel and a 35 amp/hour battery. The price for this new low power version is $20 or $35 for two kits with one set of documentation. Cash check or money order. I have also been supplying the high power version of the Solar Charge Controller Kit for several years. This controller will keep a SLA or LA 12 volt battery charged from solar panels of 3 to about 200 watts. Batteries of 2 amp hour to 110 amp/hour have been used with these controllers. This kit includes the above documentation and the high power FET, diodes and heat sink to allow up to a maximum of about 200 watts of solar panels to be connected. The kit is $30 or $55 for two kits with one set of documentation. Cash check or money order. The kit includes a 2x3 inch silk screened and solder masked fiberglass circuit board, all the parts and documentation required to build the controller, less a box to mount it into. There is also a 6 volt version available. These controllers use a precision regulator IC in an analog design that does not generate RF noise. There are no adjustments required and the assembly and check out time should be under one hour. I also still have about 6 of the low power version one of the controller. This controller will handle up to 1.5 amps or about 20 watts. This version will power a KX1, K1 or QRP K2. The price for this version is $16. The above low power controller will replace this version when these are gone. order from: Don Brown KD5NDB 19132 Falls Creek Drive Flint, Texas 75762 The price includes US postage Thanks Don _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
