I guess I may be one of the few homeowners on this forum that don't actually own an EV. But I went for PV+ESS first due to the urgency (at the time) around the federal investment tax credit.
Now I'm looking forward to trying to get a EV, and more importantly an EV charger in my home. I'm kind of confused where this EV charger would be wired. My debacle PV+ESS project morphed from a partial home backup to a whole home backup.
I have a 200 A service coming into my main panel, and this feeds the Tesla Energy Gateway 2 (TEG2). The optional internal panelboard is used as a generation panel (3 Powerwalls) and is connected the backup side of the TEG2. The other backup lugs are connected to a 200 A sub-panel that ultimately feed and backup all of my home loads.
So for options:
1) The EV charger could be fed from the 200 A sub-panel that serves the rest of my home. But if there is a power outage at night, the EV could take all my battery power and leave my home with nothing. Unless, somehow the EV chargers can be intelligently load-shed or triggered to turn off in the event of a grid power outage. I guess this approach would be cool if ever they allow V2Grid (or V2Home)
2) The EV charger could go on a new non-backup sub panel that feeds off of the left side of the Gateway 2. But I don't know if the TEG2 still has room to access the non-backup lugs when the optional internal panelboard is in place. If I were able to do this approach, would I need to get an authorized Power Ranger back to my house to add CTs and configure the TEG2? Or is the TEG2 already smart enough to sense loads on the non-backup side without adding CTs or doing any admin/setup?
3) The EV charger could be put directly into the 200 A main panel. If allowed, I guess I'd definitely need to get a Power Ranger out here to add the CTs so the PV energy could find its way to the EV charger.
This all made perfect sense to me back when I was doing a partial home backup since there was a sub-panel all raring to go for non-backup loads like an EV charger. I didn't really think about how to add an EV charger to a "whole home" backup until now.
Now I'm looking forward to trying to get a EV, and more importantly an EV charger in my home. I'm kind of confused where this EV charger would be wired. My debacle PV+ESS project morphed from a partial home backup to a whole home backup.
I have a 200 A service coming into my main panel, and this feeds the Tesla Energy Gateway 2 (TEG2). The optional internal panelboard is used as a generation panel (3 Powerwalls) and is connected the backup side of the TEG2. The other backup lugs are connected to a 200 A sub-panel that ultimately feed and backup all of my home loads.
So for options:
1) The EV charger could be fed from the 200 A sub-panel that serves the rest of my home. But if there is a power outage at night, the EV could take all my battery power and leave my home with nothing. Unless, somehow the EV chargers can be intelligently load-shed or triggered to turn off in the event of a grid power outage. I guess this approach would be cool if ever they allow V2Grid (or V2Home)
2) The EV charger could go on a new non-backup sub panel that feeds off of the left side of the Gateway 2. But I don't know if the TEG2 still has room to access the non-backup lugs when the optional internal panelboard is in place. If I were able to do this approach, would I need to get an authorized Power Ranger back to my house to add CTs and configure the TEG2? Or is the TEG2 already smart enough to sense loads on the non-backup side without adding CTs or doing any admin/setup?
3) The EV charger could be put directly into the 200 A main panel. If allowed, I guess I'd definitely need to get a Power Ranger out here to add the CTs so the PV energy could find its way to the EV charger.
This all made perfect sense to me back when I was doing a partial home backup since there was a sub-panel all raring to go for non-backup loads like an EV charger. I didn't really think about how to add an EV charger to a "whole home" backup until now.