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3G Cellular Technology Set to Sunset

The 3G sunset is here. This year, major telecommunications providers are phasing out support of more than 22 million 3G communications devices. This includes the CDMA modem your solar system uses to measure, record and communicate production data. AT&T phased out its 3G network in February and T-Mobile will stop supporting the Spring CDMA network by March 31, 2022. 

NRG Clean Power has partnered with 365 Pronto to remove and dispose of old 3G modems, replacing them with new 4G/LTE/5G modems.

While there is no penalty for not having this equipment upgraded, system owners choosing not to replace their modems will lose the ability to monitor their solar system’s production. Without solar monitoring:

    • You won’t be able to monitor production levels.
    • Problems that reduce production won’t automatically reported. 
    • Impacts to production aren’t known until the unpleasant surprise in your energy bill.

Pricing, Payment, and Rollout

You are responsible for the cost of replacing this equipment. NRG Clean Power is committed to lowering our customers’ costs, so we have partnered with 365 Pronto to provide preferred pricing.

The 3G sunset impacts devices across the world. Demand for 4G/LTE/5G equipment is extremely high, so replacements are booked on a first-come, first-served basis. If you don’t register the replacement by May 4th, we cannot guarantee your preferred price.

Next Steps

To register your system, complete this simple, step-by-step form. The application takes less than 10 minutes. You’ll be asked to:



    1. Verify the accuracy of records about your system and site location.
    2. Make an initial payment for the work to commence.
    3. Provide the contact information for a local provider to schedule the work.


Current estimates are 14-16 weeks for equipment delivery. Once your 365 Pronto service provider has the equipment they will reach out to schedule the installation. In many cases, you don’t have to be present during the installation.

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