How to Charge Two EVs at Home: Tesla Group Power Management Guide

The Problem — Two EVs, One Panel

The most common Bay Area scenario: a household goes from one EV to two. The first Wall Connector was installed three years ago. Now the second car is in the garage and the question is — how do we charge both? Most homes weren't wired for one EV, let alone two, and a 100A or 125A panel doesn't have room for a second 60A breaker without load management.

You have two real options: add a second dedicated circuit, or use Tesla's Group Power Management to share the circuit you already have. Each is right in different situations.

Option 1: Two Separate Circuits

Two separate 60A circuits — one for each Wall Connector — let both cars charge at full 48A / 11.5 kW simultaneously. No load management, no shared bandwidth, no waiting. This is the right answer when:

• You have a 200A panel with comfortable headroom
• Both drivers regularly need 200+ miles of overnight range
• You've already added solar plus battery and have generous service
• You want the fastest possible charging without any throttling

Cost: roughly 1.7–2x a single Wall Connector install — call it $3,000–$5,500 in the Bay Area for two circuits, two units, conduit, and permit, depending on panel work and conduit length.

Option 2: Group Power Management

Group Power Management is Tesla's wireless multi-charger feature. Up to six Gen 3 Wall Connectors wire onto a single shared circuit and coordinate with each other directly — no hub, no app, no internet required. When two cars are plugged in, they split the available current. When one finishes, the other automatically ramps to full speed.

The wireless coordination happens between Wall Connectors during commissioning (we pair them with the Tesla Pros app). After that, the chargers handle load sharing locally. You don't configure anything in the Tesla app day-to-day — it just works.

On a 60A shared circuit with both cars plugged in, each gets ~24A (5.7 kW, ~22 miles per hour). When one car unplugs, the other ramps to 48A / 11.5 kW. Over a typical 8-hour overnight charge, both cars gain 80–150 miles of range — more than enough for almost any commute pattern.

Cost comparison: a Group install adds roughly $1,200–$1,800 per additional Wall Connector beyond the first — meaningfully cheaper than running a second dedicated circuit. The savings come from sharing one panel breaker, one conduit run, and one permit instead of two of each.

Real-World Scenario: A Burlingame Family

A Burlingame couple bought a Model Y in 2022 — ChargeWizards installed a Gen 3 Wall Connector on a 60A circuit in their garage. The home is a 1960s build with a 100A panel. In 2025 they added a second Tesla, a Model 3.

We installed a second Universal Wall Connector six feet from the first, wired in parallel on the same 60A circuit, and paired them via Group Power Management. Total install time: 3.5 hours. Total cost: $1,650 (second unit, conduit, parallel wiring, commissioning, permit). They drive ~50 miles total per day across both cars — nowhere near the 80 miles per hour the shared circuit can deliver overnight.

No panel upgrade. No second permit. No second meter pull from PG&E. Both cars charge fully every night.

What About Non-Tesla EVs?

Group Power Management coordinates only between Tesla Gen 3 Wall Connectors. It will not load-share with a ChargePoint, Wallbox, Enel X, or any other brand. You have two clean options:

• Two Universal Wall Connectors in a Group. The Tesla Universal Wall Connector has both NACS (Tesla) and J1772 (everything else) connectors built into the same unit. A Rivian, Ford Lightning, Hyundai Ioniq 5, or Polestar plugs into the J1772. This is the simplest answer for most mixed-brand households.
• A brand-agnostic load management panel. If you already own a non-Tesla charger you want to keep, or you need to coordinate >2 brands, we install a load management panel that monitors the main and throttles each charger as needed. More expensive than a Group setup, but brand-flexible.

Call (650) 542-8877 and we'll lay out which is cheaper for your specific cars and panel.