As the back-end software provider for thousands of EV charger deployments, we can confidently report that the #1 cause of issues for EV charger deployments is connectivity.
In order to track charger usage, enable power management, and collect pay-per-use fees from EV drivers, your EV chargers must have a reliable connection to the internet. There are three common ways to connect EV chargers to the internet, and in turn, cloud management software: Wi-Fi, Ethernet, and cellular data (currently 4G networks).
It is important not to overlook the importance of connectivity. This can lead to unexpected issues down the road, from EV drivers not charging to crucial data for utility programs not being reported. Here are our top tips for EV charger connectivity:
- Installing Wi-Fi mesh networks or testing 4G connectivity is not the specialty of most certified electricians. Communicate transparently with your installer about connectivity. If they are not an expert, ask them to recommend a local service provider that specializes in commercial building connectivity. There are many installers of lobby Wi-Fi, security cameras, and other smart building technologies that are well-equipped to help connect your EV chargers.
- Test connectivity before installing your EV chargers. Everywhere you plan to install an EV charger, you should aim for:
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- 4G signal strength of −80 dBM or greater if you are using 4G connectivity.
- Wi-Fi signal strength of −67 dBM or greater if you are using Wi-Fi connectivity.
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- Signal strength varies throughout a site and even from one parking space to the next. Check connectivity at the exact location every EV charger will be installed.
- Most EV chargers support multiple connectivity modes and can be installed with one as a primary and another as a backup. For example, a 4G primary connection with Wi-Fi as a backup. Or Wi-Fi primary connection with Ethernet as a backup. Running two types of connectivity to every EV charger adds costs, but can be worth the investment. Especially if your EV chargers are critical to fleet or public infrastructure.
- Make an action plan for what happens if there are connectivity issues. The platform will automatically notify you when chargers go offline. Identify in advance who will address these issues: your own facilities management specialist, your electrician/installer, or your smart building connectivity expert.
Many EV chargers can be configured to offer free charging even when they become disconnected from the network, or to allow offline charging for authorized RFID card users who will be billed when the charger comes back online. Make sure to speak to your installer about setting up these offline redundancies. Communicate with your users about ordering RFID cards if relevant.
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