This is the last test using the 48v as an incoming source; later converted to 110~volt~ as the source
Coincidentally, although no longer being energized by direct energy pending a cash windfall that will allow me to purchase enough solar panels for the project, I've found that the rock is still exercising it's purpose gained from the firewood stove. In other words, the ton of rock is still absorbing and later releasing the heat from the firewood stove just fine all by itself.
Although I have yet to test #1 DEA for current, I believe it has failed (my fault...solder was used only on element #1, and of course the element encased in rock are going to melt the solder).