Figure 7
Two graphs are arranged side by side horizontally. On the left, the graph is labeled “Annual energy summary one of the house”. The vertical axis is labeled “Energy in kilowatt hours”, ranging from 0 to 8000 in increments of 2000. The horizontal axis is labeled “Output capacity of the heating element in kilowatts”, ranging from 0 to 4 in increments of 0.5. The legend shows an “Annual imported energy”, “Annual energy use of the heat pump”, and “Annual energy use of the heating element”. Annual imported energy is high at about 5900 kilowatts. Annual energy use of the heat pump is high at (0, 2100). Annual energy use of the heating element is high at (4, 2850). On the right, the graph is titled “Annual energy summary two of the house”. The vertical axis is labeled “Annual P V self-consumption slash self-sufficiency”, ranging from 0.0 to 1.0 in increments of 0.2. The horizontal axis is labeled “Output capacity of the heating element in kilowatts”, ranging from 0.0 to 4.0 in increments of 0.5. The legend shows “Annual P V self-consumption” and “Annual P V self-sufficiency”. The annual P V self-consumption (0, 0.251), (0.44, 0.28), increases at (1.0, 0.34), (3.0, 0.38), and ends at (5, 0.38). The annual P V self-sufficiency curve begins at (0.0, 0.41), rises to a peak near (2.5, 0.52), and ends at (4.0, 0.52). Note: All numerical data values are approximated.Annual energy summary of the house with the large DHW and high electrical load profiles at different output capacities of the heating element (threshold: 5 kW, and battery capacity: 0 kWh). Source: Authors' own work