Net energy is the total amount of energy your home imported from or exported to the utility grid. To see net energy in MyEnlighten, your system must have consumption metering hardware installed.
Net energy is calculated by subtracting the energy produced by your solar energy system from the energy consumed by your home. For systems with storage (using the Enphase AC Battery), this value also takes into account the energy that was stored in or discharged from the batteries.
You can see a daily net energy measurement on the overview screen for any day during the lifetime of your system. On days when your home exported more energy to the grid than it imported, the net energy is positive. On days when your home imported more energy from the grid than it exported, the net energy is negative.
The graph on the MyEnlighten overview screen shows net energy for 15-minute periods throughout the day. The blue bars represent solar energy production and the orange bars represent your home’s energy consumption.
The darker shaded areas of the graph indicate the net energy measurements. If more energy was produced than consumed during a 15-minute period, the darker area is in the blue bar, indicating that the net energy is positive. If more energy was consumed than produced, the darker area is in the orange bar, indicating that the net energy is negative.
In this example, the highlighted period of 8:30 – 8:45 am has a net energy of -177 Wh. This is calculated by subtracting the amount of energy consumed during that time (300 Wh) from the amount that was produced (123 Wh).
If your system includes Enphase AC Batteries, the graph shows you how much energy from each period was imported from or exported to the utility grid (shown in grey) vs. how much was discharged from or stored in the AC Batteries (shown in green).
In this example from 12:30 – 12:45 pm, the solar energy production (686 Wh) exceeded the home’s energy consumption (79 Wh). Part of the excess (139 Wh) was stored in the batteries, and the remainder (468 Wh) was exported to the grid. So, for this 15-minute period, the net energy measurement was +468 Wh.
Comparing this graph from day to day provides insight into your home’s energy consumption trends relative to when your solar energy system is producing power.