http://nusun.netfirms.com/blog2 Thu, 12 Nov 2009 16:27:16 +0000 http://backend.userland.com/rss092 en nuSun, inc. sells complete solar evacuated tube type water heater collectors.  But we also sell the various individual components that go to make up a complete system, including a really nice Solar Water Heater Controller.  While the solar evacuated tubes are very efficient, they are pretty expensive and require some ... http://nusun.netfirms.com/blog2/?p=59 Solar hot water heaters require periodic maintenance, no matter flat plate or evacuated tube types. That is why I would not advise putting the collector on the roof, unless you have a safe and convenient way of accessing the collector. I am not too familar with the flat ... http://nusun.netfirms.com/blog2/?p=57 I installed my own evacuated tube solar hot water heater system. It was and still is a learning experience. One thing I learned is that you must take serious precautions against collector overheating. An overheated collector can leave you with evacuated tubes that are no longer running ... http://nusun.netfirms.com/blog2/?p=58 Good control of your solar water heating circulating pump with appropriate set points can make a big difference in the efficiency of the solar water heater.  On my system I set the turn ON point for the pump when the temperature of the collector rises 6 degrees C above the ... http://nusun.netfirms.com/blog2/?p=54 We have been having some pretty cloudy weather lately, and that has been a challenge for those of us who depend on our solar hot water systems. But I have noticed that even on days when there is cloud cover all day we still make some hot water. ... http://nusun.netfirms.com/blog2/?p=53 Today, here in the mountains, was overcast and light rain on and off all day. But the solar evacuated tubes out back made hot water off and on all day. Sure enough the water was not scalding hot but the collectors made water that was warmer than what ... http://nusun.netfirms.com/blog2/?p=52 Traffic signals in small towns and rural intersections that are equipped with either simple timed signals or simple timed signals with vehicle detection, wastes a tremendous amount of motorist's fuel and time.  The shame of it is that there is absolutely no good excuse for this waste.  Because, with a ... http://nusun.netfirms.com/blog2/?p=51 The evacuated tube as solar heat collector is an amazing piece of technology.  It is said that the evacuated tube for solar heating was invented in Germany and then sold to a Chinese company some 30 years ago.   The tubes are relatively more efficient than flat plate collectors, but they ... http://nusun.netfirms.com/blog2/?p=49 Carolina Electric Boats has developed a super electric fishing and leisure boat. They refer to it as Twin Troller, because it has two powerful electric motors in hollowed out channels underneath. This patent pending design makes for a very maneuverable boat that can turn in a very ... http://nusun.netfirms.com/blog2/?p=45 The EM 2500 SP Energy Monitor is one neat power tracking device. It features (1) twice the voltage range (220 volts) of the el cheapo versions. (2.) has clamp on current sensors, so no need to disconnect wires and thread them into a toroidal core, (3.) a bright display ... http://nusun.netfirms.com/blog2/?p=39