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My Save The Earth Porjects

Humming Bird Wings beating about 53 times per second

Candace's Home Energy upgrade

    Candace broght a home in 2015. We have made this an energy efficient home.

    • Replace 4 old inefficent Ceiling Fans
    • Add R30 Attic insulation with use of Radiant barrier
    • Energy efficient appliances
    • Weather strip all doors and windows
    • Replace wood burning fireplace with the most efficent gas burning fireplace
    • Took out all the ductings and HVAC system and replace it with eight zones radiant floor heating system
    • Replace Furnace with Knight boiler
    • Replace water heater with water tank that powered by Knight boiler
    • Add water heater blanket
    • Insulated all hot water pipings
    • Native plants
    • Replace whole house lighting to LED lights
    • Install 75Amp Open EVSE and add 3 240V outlet in garage for EV charging
    • Outdoor light sensors and timers
    • Install 10.540kW Solar PV system with Enphase micro inverters
    • Energy monitor usage and production for the entire property

    • PV System layout can be viewed here.
      PV System Wiring Diagram can be viewed here.

      System Specification:

Hong Kong Residential Roof Top Solar PV System

    In the Spring of 2015, I decided to put a PV system on my sister's roof in Hong Kong. I did not realize until after I started the project that PV is not popular in Hong Kong. Hence, I have to deal with convincing the local Utility CLP (China Light and Power), the local housing authority, as well as to design and build the system. It is a 3-phase system and I learn a lot from this project. Since this is the first solar PV project that deploys micro inverters, I also have to coordinate between Enphase and CLP to create a 50Hz grid profile.

    After 3 months of hard works, a 15.3kW PV system with Enphase micro inverters was born. The wiring diagram can be viewed here; and here is the array layout.

    System Specification:

Retrofit Darren's Home for Energy efficient

    Darren broght a home in 2013. We have put in a few items to make it an energy efficient home.

    • Replace doors and windows to double pane
    • Whole House Fan
    • Ceiling Fan
    • Retractable awnings to avoid summer heat get in the house
    • Add R30 Attic insulation with use of Radiant barrier
    • Energy efficient appliances
    • Weather strip all doors and windows
    • Replace dumb thermostats with programable thermostats
    • Six zones radiant floor heating
    • Add water heater blanket
    • Add timer for hot water circulation
    • Add irrigation smart controllers
    • Native plants
    • Replace whole house lighting to LED lights
    • Install Tesla HPWC and add 240V outlet in garage for EV charging
    • Battery backup
    • Outdoor light sensors and timers
    • Whole House Energy Monitor down to plug level
    • Mini-split heatpump 21 SEER HVAC
    • Install 8.64kW Solar PV system with Enphase micro inverters

    • PV System layout can be viewed here
      PV System wiring diagram can be viewed here

      System Specification:

Turning Alex's Home to a Net Energy Production House

Turning Jenny's Home to a Net Energy Production House


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