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Here is our official recommendation. 

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High Performance (12.5") blade: 6-7 MPH 3-Blade (18" swept diameter) blades with hub: 6 MPH 5-Blade (18" swept diameter) blades with hub: 5 MPH It's important to keep in mind that although our mini wind turbines are extremely portable, they are still prone to the same issues as larger wind turbines.  This can be a great thing because the mini turbines can help determine if a large turbine is a good investment for your location. Here are some tips for getting the most power out of your wind turbine: Generally, if you aren't getting enough output or if your turbine...

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The light bulb feature on most solar charge controllers are usually called "load" or something similar. From what we have seen, it seems to be designed for lighting applications. When the controller senses a charging current from your panel, it will turn the load off. Then, when it stops sensing power from your panel, it realizes that it must be dark outside, so it turns the load on. Usually you can also set the load to be on for 24 hours if you want. Other more sophisticated charge controllers can let you define which hours you want the load on. If...

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Questions and Answers -

"I'm concerned about catching the boat on fire"

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