Is it possible to set the powerwall 2 to charge to 80% between 1 and 3 am and then starting at 6 am start discharge when there is a need for electricity and store and excess solar power during the day (when possible)?
I don't want the battery to discharge during the night when power is very cheap and my car is charging?
Is there any kind of manual available yet?
I got an e-mail that powerwall 2 installations start in August in my region (Chicago).
Currently there is no option to set specific times to charge and discharge.
Solar will always supply the home demand first, then any excess will charge the PW.
There are currently 2 modes, Self Powered and Backup
Backup mode is strictly that, backing up your whole home or circuits you select at time of installation.
Charging in backup mode will charge your PW to 100% using excess solar and power from the grid. PW can only charge at 5kwh max so any excess coming from solar will go back to the grid.
Self Powered mode allows you to set a reserve to the PW's percent of discharge. Again solar will power the home demand first, if the home demand is higher than solar can provide then PW will start to discharge. If demand is too higher for Solar and PW then the grid will make up the rest.
Charging in Self Powered mode has a few scenarios
PW charge % lower than set reserve %
PW will be charged using solar and the grid to get to the reserve % as quickly as possible. When reserve is met, strictly excess solar will be used to charge till 100%
PW charge % higher than set reserve %
PW will discharge if home demand is higher than solar production. Excess solar will go to the grid.
So you are able to get the PW to charge and discharge at certain times but you need to play with the reserve to meet your needs. According to Tesla, an update will come out to allow time - of - use or TOU and load shifting to be accomplished. Hopefully in the next few months.
One thing to note, the PW are capable of discharging at 5kwh continuous. Having your water heater and stove on at the same time will most likely exceed this. I have two PWs so this allows for 10kwh continuous which is better suited for whole home backup / off grid use.
Regarding the manual, it is very simple. It does not explain a lot.
Hope this all helps