When you think of cellular networks, you likely associate them with cell phones – but did you know these networks also enable remote monitoring for solar systems? In 2022, major mobile carriers like AT&T, T-Mobile, and Verizon are phasing out their 3G networks. This change will affect many solar system owners in the U.S. who have 3G modems integrated into their solar setups. In this article, we’ll cover the critical information about the 3G shutdown and the actions you can take to upgrade your solar system’s modem if it’s affected.
Companies are discontinuing 3G networks to accommodate the evolving needs of modern technology. Although around 10 million people in the U.S. still use 3G phones, the shift is necessary to free up resources for newer technologies. As 5G networks are being rolled out nationwide, the older 3G infrastructure is being phased out to make room for this next generation of cellular technology.
5G networks offer several advantages over the current 4G systems. They promise data speeds that can be up to 100 times faster, with near-instantaneous response times. This enhanced speed and efficiency will also support emerging technologies that require rapid data transmission, such as advanced virtual reality applications and autonomous vehicles.
How will the discontinuation of 3G networks affect your solar system?
The phase-out of 3G networks will not directly affect the operation of your solar system if it uses a 3G modem. However, if your system relies on 3G for remote monitoring, you’ll only lose this capability if you upgrade to a 4G modem or connect your system to the Internet. This loss of remote monitoring could impact your system’s payback period, as you may not be able to track performance and troubleshoot issues as efficiently.
Performance Monitoring
Keeping track of your energy consumption and generation helps you understand your electricity expenses. It’s also crucial to ensure that your system is operating correctly. If a problem arises with your system, monitoring apps can alert you to issues such as lower-than-expected production. In many cases, installers can remotely diagnose and resolve issues. Without this monitoring capability, you might miss signs of system underperformance, potentially leading to missed savings.
Performance-based incentives
Cellular modems play a crucial role in solar systems, especially in areas with performance-based incentives like solar renewable energy certificates (SRECs). These incentives use remote monitoring to track your system’s production and compensate you accordingly—earning one SREC for every megawatt-hour (MWh) generated. If you have a 3G modem and decide not to upgrade or connect to the Internet, you’ll stop receiving your quarterly SREC payments, which could significantly extend your system’s payback period.
For instance, in Massachusetts, the bid price for an SREC is $287. If you have an 8-kilowatt (kW) solar system generating about 8 MWh of electricity annually, you could miss out on nearly $2,300 each year if you don’t upgrade from a 3G modem.
How can you upgrade your modem?
If you’re looking to upgrade your system, you have several options. The simplest—and often most cost-effective—approach is to follow the recommendations from your inverter manufacturer. Enphase and SolarEdge inverters are featured in over 90 percent of quotes on the PEP Solar. You may also have the option to connect your system to the Internet instead of upgrading the modem.
Enphase
If you own a solar system with Enphase microinverters and have a 3G modem, you’ve likely been contacted by Enphase about an upgrade. Their program has been underway for several months, upgrading many customers to 4G modems. If you’re unsure whether your modem needs an upgrade, refer to Enphase’s guidelines on checking your modem information; systems installed before 2018 are most likely due for an upgrade.
For those who haven’t upgraded yet, there are a few options. In December 2021, Enphase acquired 365 Pronto, a company specializing in technology and maintenance, to handle modem upgrades for their systems. Alternatively, if you’d prefer to install the modem yourself, Enphase offers a DIY video guide and FAQ. The replacement modem is priced at $381, but if your system is relatively new, the cost might be lower.
SolarEdge
If your system uses SolarEdge string inverters, you’ve probably received a notification from SolarEdge or your original installer, mainly if you went through a larger company. To ensure the 3G shutdown doesn’t affect your system, you can either contact your installer or email SolarEdge directly.
Are you willing to upgrade your SolarEdge modem? Start by contacting your original installer for help with the installation. If they’re unavailable, you can use a form to reach a SolarEdge-authorized provider. If you prefer a DIY approach, you can follow an installation video, which should take about 20 minutes. However, you’ll need to buy the new modem through a distributor, as SolarEdge doesn’t sell them directly to customers. The cost will vary depending on the distributor or installer.
Once you replace the modem, your system’s communication plan will automatically extend to December 31, 2028.
Are the upgrades of the modem covered under warranty?
Unfortunately, the warranty typically doesn’t cover the cost of a replacement modem for both Enphase and SolarEdge systems. However, SolarEdge is offering 12-year modems free of charge (though labor costs are not included). For Enphase, the cost of the new modem may be prorated based on the age of your system.
Connecting the system to the Internet without upgradation
You don’t necessarily have to upgrade your modem. Both Enphase and SolarEdge systems can connect to the Internet. Enphase offers a step-by-step guide for connecting to your home WiFi, while SolarEdge allows for an Ethernet cable or wireless card connection. However, you’ll need an installer to remove the inverter cover.
However, be aware that opting for an Internet connection instead of upgrading to a 4G modem may cause monitoring disruptions or impact SREC earnings if the connection is unstable.
Explore more solar options with PEP Solar
Are you planning to install a solar system? The great news is that 4G modems will remain relevant for the foreseeable future, ensuring you have the latest solar technology. To maximize your return on investment, it’s best to compare quotes. On the PEP Solar Marketplace, you can receive personalized quotes from local installers to help find and install the right system that fits your needs and budget.