SMA Solar Technology AG Appendix
User Manual SWebBox-BEN111033 89
15.6 Sunny WebBox with GSM Modem
15.6.1 Notes on GSM Card Contract
In contrast to land line telephones, cell phone network providers distinguish between voice and data
services. For example, cell phone network providers provide different telephone numbers for voice
and data for GSM devices.
If both outgoing and incoming data connections are necessary, a GSM device will need its own data
number for CSD data services. The Sunny WebBox does not support other data services. A standard
SIM card with additional data connectivity has two telephone numbers (multi-numbering). You can
apply for additional data connectivity with your service provider when obtaining a contract. Outgoing
data connections from the Sunny WebBox (access to an Internet service provider) are possible
without an additional data number.
15.6.2 Selecting the GSM Tariff
Select a GSM tariff based on the data volume of the connected devices. Refer to the following table
to find out about the inverter’s expected monthly data volume.
Sunny WebBox with...
*These values represent estimated data volume. No responsibility is taken for the correctness of this information.
Base Number of measured values in the interval
Period Length of the measurement interval in seconds
TimeStamp Time stamp, at which the average was calculated
Selecting the right GSM tariff
The specified data volumes only serve a rough guide. They are based on the number of
connected devices and their settings. Contact SMA if you have any questions about which
tariff to choose.
GPRS data transmission
The Sunny WebBox's GSM modem supports GPRS data transmission.
...up to 5 devices ...up to 30 devices ...up to 50 devices
ca. 30 MB per month* ca. 300 MB per month* ca. 400 MB per month*
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