Click this link if you want to start at the beginning:
FIRST BLOG ENTRY
This is about a 12 minute video which shows what this unit is capable of. We hope to use it to save as much propane as possible...
This oven lead me to invent one more item. This will be a SOLAR HOT WATER HEATER. On the boat we have a 12 gallon hot water tank that either heats water with shore power (110 volts AC) or the engine, which has coolant line going to and from the engine. Thus when the engine is running, the coolant travels through an element inside the hot water tank and makes hot water. If we are at anchor for any period of time we will not be hooked up to shore power and we would prefer not to run the engine just to make hot water. So the Solar Hot Water Heater should do the trick.
If you can see the terrible diagram I drew, you see that I will add a 3 way valve to the supply and return coolant lines which will take the engine in and out of the heating loop. With the valves in one direction, the engine will heat the water as it always has, however, when the valves are the other way, then with the help of a small 30 gallon per hour 12 volt pump, we will circulate coolant through 2 (or maybe 4) black tube coils inside a sealed black box with a clear Lexan lid. To power the motor I will use a small solar panel. Lastly the whole thing can be put in and taken out with 2 quick connect couplers. If it all works the way it should, whenever the sun is out I should be making hot water with NO draw on our existing electrical system. And when the sun goes down the solar panel will stop supplying the motor and the system will turn itself off until it next "sees" the sun. With all the bits and pieces I hope to make this for around $100... I have found the 2 valves for $20 each and the pump motor for $20. I'll post an update on this when I have these 2 solar appliances working.