Victron GlobalLink 520:
We believe that having insight into your installation is a key factor in maintaining and operating your off-grid energy solutions. Off-grid should not mean off-line, so we have created the GlobalLink 520. This device will bring 4G LTE-M connectivity to all VE.Direct enabled devices without any monthly fees or subscriptions, for the first five years.
Manual:
https://www.victronenergy.com/upload/documents/GlobalLink_520/GlobalLink_520-en.pdf
