Tesla Motors Club
I have recently subscribed to my utility grid services through Tesla where Tesla uses renewable energy stored in battery during peak hours. The incentive is based on average kWh used:
Tesla app says Powerwall exported 17.5kWh that day and is confirmed above. But the 'grid_services_energy_exported' shows only 10.98kWh that day. Other days are lower depending on how much solar production happens at the time, and how much the house uses.
So it seems that Tesla is computing the net exported from the Powerwall to the grid (minus solar production and house use).
I guess the wording from the program is not clear on what "used" mean. But the estimate dollar amount on average is much lower than the gross amount used by Powerwalls.
For reference, this is the Connecticut incentive with Eversource. Battery Storage Demand Response
Incentives for home batteries are based on the average kilowatt (kW) used per event, averaged over the season.
But I have looked at Tesla API which provides historical data, and stumbled at this for one of the days last week:
'period': 'day', 'installation_time_zone': 'America/New_York', 'time_series': [{'timestamp': '2020-08-20T01:00:00-04:00', 'solar_energy_exported': 62240.605277817696, 'generator_energy_exported': 0, 'grid_energy_imported': 12591.912777781487, 'grid_services_energy_imported': 81.56046702025924, 'grid_services_energy_exported': 10982.20399170497, 'grid_energy_exported_from_solar': 21980.641008299426, 'grid_energy_exported_from_generator': 0, 'grid_energy_exported_from_battery': 10982.20399170497, 'battery_energy_exported': 17590, 'battery_energy_imported_from_grid': 81.56046702025924, 'battery_energy_imported_from_solar': 20238.43953297974, 'battery_energy_imported_from_generator': 0, 'consumer_energy_imported_from_grid': 12510.352310761227, 'consumer_energy_imported_from_solar': 20021.52473653853, 'consumer_energy_imported_from_battery': 6607.79600829503, 'consumer_energy_imported_from_generator': 0}]}
Tesla app says Powerwall exported 17.5kWh that day and is confirmed above. But the 'grid_services_energy_exported' shows only 10.98kWh that day. Other days are lower depending on how much solar production happens at the time, and how much the house uses.
So it seems that Tesla is computing the net exported from the Powerwall to the grid (minus solar production and house use).
I guess the wording from the program is not clear on what "used" mean. But the estimate dollar amount on average is much lower than the gross amount used by Powerwalls.
For reference, this is the Connecticut incentive with Eversource. Battery Storage Demand Response