An EV panel upgrade is the honest first step when a load calculation shows the existing service cannot carry a Level 2 circuit. We upgrade the service or add a subpanel, then run the charger circuit onto capacity it actually has — rather than squeezing a 48-amp circuit onto a maxed-out Bend panel and living with nuisance trips and a hot panel.
Why the panel sometimes comes first
A Level 2 charger is a continuous load, and the panel has to have real headroom to carry it. When the load calc shows the service is already near its limit — a full 100-amp panel with a range, dryer, and AC, or no open breaker spaces — the right sequence is to upgrade the service or add a subpanel first, then land the EV circuit. Skipping that is how an undersized panel ends up tripping breakers or running hot once the car is charging nightly.
Upgrade the service or add a subpanel?
If the main service itself is undersized, the fix is a service upgrade — often to 200 amps — coordinated with the utility, permitted, and inspected. If the service has capacity but no open slots, or you are wiring more than one EV or an ADU, a subpanel adds circuit spaces more simply and cheaply. The load calc tells us which one your house needs; we will not sell a full service change when a subpanel solves it.
- Load calc. Existing connected load against the service rating — the deciding number.
- Service upgrade. When the main is undersized; utility-coordinated, permitted, inspected.
- Subpanel. When you need spaces or are adding multiple circuits.
- Then the EV circuit. Sequenced as one job so the charger lands on real capacity.
Sequenced as one job
We plan the upgrade and the Level 2 install together so nothing is wasted and nothing trips. If you are wiring for more than one car or an ADU, see multi-unit charging, and for the full picture on whether you even need this step, read do I need a panel upgrade for an EV charger and what amperage you need.