Reference Designs

The SolarMagic™ SM3320-RF-EV reference design integrates a power optimizer and a low-cost 2.4GHz radio to add a remote shutdown feature to a PV system. The remote shutdown feature can be used during installation: maintenance: or emergency situations to de-energize the PV system.Although its principal purpose is to communicate shutdown intent: this RF system is 2-way and can be used for a wide variety of communication applications: including monitoring: security and identification. One of the unique features of the SM3320-RF-EV is its use of the DC power lines as an RF antenna and transmission line. This enables the SM3320-RF-EV to maintain radio communication even when it is mounted in the junction box of the module.The SolarMagic™ SM3320-RF-EV is based off of the SM3320-1A1 power optimizer: and shares all of its best-in-class power optimization features. This includes its ability to mitigate real-world mismatch: its 99.5% peak efficiency: and its Panel-Mode operation. In addition: the same ultra-low profile form factor of the original SM3320-1A1 is maintained so that it can be integrated into the same junction box designs. This evaluation board should work as a power optimizer even without a transmitter.