I’m seeing occasional nonsense data for the energy statistics for my Apex 300.
Here’s an example:
Notice how the grid shows 53kWh, with all of it happening across 6 hours (10:00, then 16:00-20:00).
These numbers are literally impossible, as my Apex300 is connected with a 120VAC power input. Grid input is set to 12A, so even if it were taking grid input at the maximum (12 x 120 = 1440W, roughly 1.5kW) this would only account for 1.5*6 = 9kWh. Even if it were running at maximum input for 24 hours, that would still only be under 36kWh. There’s simply no way you can get 53kWh out of a 1.5kW grid input in a day.
Most dates do not show this bug - here’s a more normal looking day with data that is believable:
If I zoom in on one hour, I see this:
Somehow the Apex300 is reporting that in one hour (19:00 to 19:59) it pulled nearly 15kWh from a 1.5kW input. Nonsense.
Now that I look more closely, I’m seeing other days with impossible values.
Here’s the 12th of may (yesterday):
Notice the spike at 0800 hours:
Again, there’s no way the Apex300 could physically pull 6kWh from a 1.5kW grid input in one hour.
As far as I can tell, the PV and AC data looks normal to me, it’s only on the Grid input where I’m seeing these anomalies.
Here is the Power Input data for that time period (Grid: blue, AC : orange)
The power data looks correct to me: I’m in self-consumption mode. i ran a tea kettle which ran on battery power. Afterwards the Apex300 used grid input to recharge. There is a spike in Grid input, but it’s about 1.5kW, and it lasts about 15 minutes, which adds up to about 1.5 / 4 = 0.375 kWh.
If I zoom in on the Grid portion only for that one hour period, I see this:
As a rough estimate, this is:
- baseload of 400 watts x 1 hour = 0.4 kWh
- two spikes, small one of 0.2kWh, big one of 0.4kWh.
- total should be about 1.0kWh
yet the Apex is reporting 6.0kWh!
It seems like the Grid calculation math is simply faulty?
