As the days get shorter and the evenings cooler, we are lighting the wood fired kitchen stove most nights now. This old stove, that I have lovingly maintained and repaired for the past 40 or so years, cooks our food, heats our hot water, through its bronze firebox boiler, which is connected to our kitchen hot water system. It also heats the kitchen and us while we work, cook and eat.
In the hottest couple of months of summer, we cook on the gas stove and rely on the solar hot water panels to heat the hot water. We have had to cover the solar panels with wire mesh, as we had a pine cone drop onto one of them shattering the tempered glass.
It may seem strange that we have our solar panels on the ground. I have a good reason. We have a full copper hot water system, with a copper hotter tank, a bronze boiler in the stove and copper solar panels, all connected in series, so that either or both heat sources can heat the tank depending on the weather and time of year. I used all silver soldered copper piping to connect the system, so there isn’t a separate heat exchanger needed in the system to eliminate electrolysis. A full copper system has no electrolysis issues. Eliminating the heat exchanger makes the system much more efficient. I designed the system so that the solar panels are on the ground, so that the hot water will rise up into the tank by natural thermo-siphon. No pump is need in the system to circulate the hot water to the tank. (as is necessary when the panels are on the roof.) This is another added efficiency and saving on energy. By designing systems like this and others in our hand-made home, we have managed to reduce our energy usage in our home to 1.7 kW/hrs per day for the house alone. If we add in charging the electric car and firing the electric kiln from the solar system, then our total usage rises up to 5.7 kW/hrs per day.
When we add in our kiln and car, Janine and I still use only half of what a ‘normal’ single occupant household uses. Or just one-third of a ‘normal’ 2 person household. We are quite pleased with this outcome.