Powering the Future from Home

As the world moves towards sustainable transportation, electric vehicles (EVs) have emerged as a promising solution to reduce greenhouse gas emissions and combat climate change. Charging EVs at home is convenient and helps optimize charging costs. To ensure efficient load sharing and maximize the charging rate, homeowners may consider upgrading their service to 320A. In this blog, we will explore load-sharing techniques for home EV charging and the scenarios in which upgrading to a 320A service becomes essential. Additionally, we’ll look at some products that facilitate load sharing for multiple EVs.

Understanding Load Sharing for EV Charging

Load sharing in the context of EV charging refers to the distribution of electrical power between multiple charging stations to prevent exceeding the maximum capacity of the electrical system. When charging two or more EVs simultaneously, the total energy demand can exceed the capacity of the existing electrical service. Load sharing allows for an equitable power distribution while ensuring that each EV charges optimally.

When to Consider Upgrading to a 320A Service?

Two Tesla Wall Connectors

Multiple EVs in the Household

If your household has two or more EVs, upgrading to a 320A electrical service is highly recommended. With two EVs charging at once, each requiring 40-60 amps, along with other household loads, the standard 100-200A service may not be sufficient to prevent overloading the electrical system.

J1772 Charger in EV charge port

Fast Charging

Faster charging requires a higher power supply. If you wish to charge your EVs at the maximum rate, a 320A service will ensure each vehicle receives the required power without compromising charging speeds.

SPAN Installer Wiring


If you plan to add more EVs to your household or expect an increase in overall electricity demand, upgrading to 320A will future-proof your electrical system.

Products for Load Sharing Charging Stations

Some EV charging stations come equipped with built-in load-sharing capabilities. These stations can communicate with each other and adjust charging rates based on the available power supply.

Wallbox Chargers

Use energy management software such as dynamic load balancing with POWER BOOST to keep the EV charger from exceeding the power capacity of the electrical panel, regardless of whether other appliances are on simultaneously. Plus, you can charge multiple EVs at once with Wallbox chargers and divide the charging power evenly among various chargers on the same circuit. And you can charge different car models at once.

Tesla Gen 3 Wall Connector

Power sharing on the Gen 3 Wall Connector allows up to six chargers to share and charge multiple vehicles simultaneously. The power sharing occurs via the Wi-Fi connection between the units. You’ll need to identify the lead Wall Connector to set up power sharing between the chargers. If you have multiple Tesla EVs, you’ll have no problem power sharing between the Wall Connectors. Unfortunately, they must all be Gen 3 wall chargers and only Tesla EVs.

Benefits of Load Sharing and Upgrading to 320A service

Optimized Charging

Load sharing prevents the electrical system’s overload and ensures that each EV charges optimally without compromising charging speed.

Cost Savings

Efficient load sharing can help you avoid peak demand charges and reduce the electricity costs of charging multiple EVs.

Reduced Environmental Impact

By maximizing the use of renewable energy sources and off-peak electricity, load sharing contributes to a greener charging process. Wallbox has the Eco-Smart feature, automatically sending excess solar energy to your EV.

Convenient and Seamless Charging

Load-sharing solutions with Wallbox and Tesla’s Wall Connectors can be automated, providing a hassle-free charging experience for EV owners after the initial installation.

Upgrade How You Power Your Future

Load sharing is crucial to home EV charging, especially when multiple EVs are involved. By distributing electrical power efficiently, load sharing prevents overloading the electrical system and optimizes charging rates for each vehicle. For households with two or more EVs and a desire for faster charging, upgrading to a 320A service becomes essential. With a reliable 320A service and load-sharing products, you can enjoy the benefits of electric mobility without worrying about power limitations, making your home EV charging experience seamless and sustainable.

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Manuel Larrain
Manuel Larrain is a Chilean-born US citizen who studied business and sustainability at Western Washington University. Solar energy is his passion, as it is transforming how Washingtonians power their lifestyle. He believes we can address climate change, environmental justice, and steward a brighter future for all of us through renewable energy.