Here is where the comparison comes in. I have not been able to find any output values for the 12 volt streamliner, other than they produce 225W (15 amps) at 19mph, whereas the standard heavy duty charger only puts out 14 amps at 23mph. Obviously the larger propeller can take advantage of slower speed winds. One thing I'd like to know is what the cut-in wind-speed would be, I assume it would be somewhat slower than the standard charger? I charted a basic line graph of what I estimate the ampere output to be, starting the Streamliner at 5 1/2mph and the Heavy Duty at 9mph. From the graph you can see that the 7 1/2' propeller gives about 4 amperes more than the standard charger at most windspeeds. The greater output would be exceptionally useful for keeping my battery charged, as it is rare to get more than an few hours a month with enough wind (23mph) to get good output from a 1222H charger.
This leads to to my second question, what is the functional difference between a standard 12 volt Heavy Duty charger and the 12 volt Streamliner? Electrically the generator looks to be identical, however I could be wrong as I have never seen a streamliner in person. Mechanically, all I can tell is the streamliner has a larger 7 1/2' prop. with larger (edit: learned it is a 32") governor. Maybe the tail would need to be longer, but I don't know. I am not that familiar with wind energy but it seems to me that one could install the larger propeller assembly on a standard Heavy Duty charger, and get the increased output at low winds, just like with a Streamliner.
If this is the case I could hunt down a Heavy Duty charger and stick a 7 1/2' propeller on it. This would produce a much better output with the wind I get, compared to a factory 6' propeller. What do you all think?
In case anybody wants to see, this is my current lighting plant; 220AH 12 volt battery charged manually from a couple 100w panels. This runs 12 volt lights and once I find some, a couple tools for my off-grid workshop. (Anybody have any corded 12 Volt Milwaukee drills for sale
