This is an alternative to the expensive yearly winterization.  I'm using this on myTige inboard V-drive in Minnesota instead of paying the $700 cost for annual winterization.  This kit includes two WiFi capable thermal controllers that individually power two portable heaters that can be located in the engine compartment to keep it above freezing.  The WiFi controllers regulate power to the heaters within user defined temperature parameters and provides notifications via free mobile app to your mobile phone if the temperature goes outside of user set parameters.  See photo examples of the trend lines available in the free mobile app - in the screen shots you can see an example when the temperature drops below the trigger point of 45 degrees F, activating the heater and warming up the engine bay to the upper limit.  There is also an example of what the low temperature alarm notification looks like in the App.  In the event of a low temperature alarm, in addition to the notification received on your mobile phone, the temperature controller also emits an audible alarm and it is also indicated in the app.  There is also an alarm notification if the controller goes offline either due to loss of WiFi or power.  

 

I use two heaters with two independent controllers as a means of redundant backup should one controller or one heater fail.  The temperature controllers include a temperature probe that I recommend placing on the opposite side of the engine bay from the heater (this is to assure in the event of a controller or heater failure, the single heater heats up the entire engine bay to above the setpoint rather than only the side the heater is on).  You could potentially use just 1 controller and heater, but a failure of either could then be catastrophic to your engine.

 

This kit includes two temperature controllers, each one WiFi capable, two portable space heaters and instructions for suggested setup.  Temperature controllers without WiFi are also available for less money.  If you wish to make adjustments to the contents of the kit (for example if you want to purchase only the controllers and desire to use your own heaters) please reach out and I can customize a listing for you.

 

IMPORTANT NOTE:  I make no guarantees or warranty with regards to the components or overall performance.  Due to the many different makes and models of boats, weather conditions and storage options, I make absolutely no guarantee that this will work for your specific application.  I highly suggest installing this along with a proper winterization and monitoring its performance in the free mobile app for the first year to verify that it is capable of keeping your engine bay well above freezing.  Any purchase of this kit acknowledges that I bear no responsibility or liability with regards to any damage incurred.  You are responsible for making sure your boat is adequately protected from fire and/or freezing.