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It did exactly what I hoped. No discharge till 6pm, then it discharged at 5 kW till it reached my reserve. Solar added and house draw decreased the actual grid export, but it registered 9.6 kWh exported to the grid after 6 pm.I think I'll leave my settings alone for now and see what it does today. (Export Everything, Time Based, 20% Reserve, Grid Charging allowed)
Change the peak time to start later so you will still use solar instead of your PW when the sun is still high enough to cover you. My utility peak time starts at 4:00 pm, but this time of year I set it to 5:30. In July I had it set at 6:00pm.My export to the grid hit the powerwall reserve limit at about 730 pm, and the house started pulling from the grid at peak rates. Unfortunately the AC also started so we were pulling 5kW. I need to run some numbers to see how well we did on this event. If the events continue to be timed for when there is limited solar generation because of clouds it may not be reasonable to participate in future events.
I'm having trouble finding the reference again, but I believe the baseline is probably calculated as the average of the five days with the highest power consumption out of the previous ten non-event weekdays for the same hours as the event. The previous ten non event days would be 8/3-8/5, 8/8-8/12 and 8/15-8/16. The five days with the highest net consumption (or least export) from 6-9pm would be averaged to get the baseline that represents "normal" usage.
I downloaded the data from the Tesla app and shared it through Gmail with myself to get the data as a CSV file in 5 minute intervals which includes data for the Grid. You can then use Excel, Google Sheets or whatever Apple calls their app to open the CSV and sum the "Grid (kW)" data from 6:00-9:00pm. Finally multiply the total by 5/60 (min/hour) to get kWh.How to find how much power I sent to the grid for the event?
Thank you for taking your time to share this with me.I downloaded the data from the Tesla app and shared it through Gmail with myself to get the data as a CSV file in 5 minute intervals which includes data for the Grid. You can then use Excel, Google Sheets or whatever Apple calls their app to open the CSV and sum the "Grid (kW)" data from 6:00-9:00pm. Finally multiply the total by 5/60 (min/hour) to get kWh.
Doing this for my data I got 22.97 kWh for my Powerwall discharge and -17.61 kWh for the Grid export. The Tesla app reported 22.9 kWh for my Powerwall discharge which is likely based on instantaneous flow versus incremental. PG&E should be measuring this in increments of 15 minutes, so this calculation should be a match.
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