For Bay Area folks, I asked EA and found this out re Signet vs non-Signet chargers:
Signet:
100019 – Target - Rocklin, CA (last one going East from Sacramento before you'd get to Tahoe)
non-Signet:
600002 – Target (Riverside Blvd) - Sacramento, CA (Manufacturer: BTC)
100027 – Save Mart - Truckee, CA (Manufacturer: ABB)
Santa Rosa, CA (Manufacturer: ABB)
Walmart 2458 - Salinas, CA (Manufacturer: ABB)
I've pinged about a few more and will post when I find that out
Edit:
Looks like Rocklin is the only Signet one to avoid in the area (at least where I may need to top off). Great to see the S Lake Tahoe one is open now!:
600137 - Walmart 4393 - North Highland, CA : BTC
110011 - South Lake Tahoe, CA 1-139 : ABB
110010 - Folsom Premium Outlets - Folsom, CA : ABB
600136 - The Cannery - Sacramento, CA : BTC
600001 - 16th & L Street Parking Lot - Sacramento, CA : BTC
600006 - Target T0312 Fulton Ave - Sacramento, CA : BTC
600139 - Riverpoint Marketplace - Sacramento, CA : BTC