As an existing customer, you will not see any changes to your billing or rate plan, yet. The Solar Billing Plan (NEM 3) agreement allows existing customers who began service on NEM 2 to remain on NEM 2 for 20 years from the date that permission to operate (PTO) was granted.
It is important to recognize that this agreement is from when you received PTO, not from The Solar Billing Plan (NEM 3) implementation date of April 15, 2023. If you received PTO in 2017 for instance, you would keep your grandfathered NEM 2 rate until 2037.
It is also important to point out that if you need to upgrade your system beyond 10% or 1 kW (whichever is greater) of its existing size during that time frame, you will need to get a new PTO and therefore, may be transitioned sooner.