I have an 18.6 kW solar system with 3 Powerwall 2s (40.5 kWh stored power). We have just bought a Tesla Y and have a Tesla wall charger gen 3 installed. We only have 1 car which we recharge at night as it is not at home during the day (mon to fri). We want to use the Powerwalls to recharge the car.
We recently completed a trip and returned home with 36% car battery charge. We plugged in the wall charger and in the morning the car had recharged (42 kWh) yet the powerwalls were showing 78% charge. This looks like the car bypassed the powerwalls and recharged from the grid. That's not what we want. We want to recharge preferentially from the powerwall and avoid using the grid. We are not worried about draing the powerwalls as we produce enough solar during the day and export o daily average = 30 kWh.
We don't need to fully recharge the car as we can top up from solar during the weekend when the car is at home.
Any suggestions as to why our wall charger seems to be bypassing the powerwalls?
We recently completed a trip and returned home with 36% car battery charge. We plugged in the wall charger and in the morning the car had recharged (42 kWh) yet the powerwalls were showing 78% charge. This looks like the car bypassed the powerwalls and recharged from the grid. That's not what we want. We want to recharge preferentially from the powerwall and avoid using the grid. We are not worried about draing the powerwalls as we produce enough solar during the day and export o daily average = 30 kWh.
We don't need to fully recharge the car as we can top up from solar during the weekend when the car is at home.
Any suggestions as to why our wall charger seems to be bypassing the powerwalls?