Drain Water Heat Exchanger to recover heat from drain water and use it to preheat the water going to the heater to reduce energy needed to heat water by 30% or more and reducing wear and tear on the water heater and stopping this energy from being wasted down the drain.
3.93kW grid tied PV system on the roof.
1.4kW battery charging PV system with small wind turbine and 500aH Nickel/Iron battery pack with custom control made by me to automatically turn on the inverter and send power into the house when batteries are fully charged. This charges all phone and other device batteries as well as emergency lighting.
2000 VW Golf diesel running on used vegetable oil filtered in my basement.