

Over 1,500 companies worldwide rely on WhereverSIM
Whether it’s a solar power system, wind farm, battery storage system, or substation: Decentralized power generation systems rely on a reliable data connection. This is the only way to transmit operational data and reliably monitor systems so they can be accessed remotely when needed.
If connection interruptions occur or network coverage is insufficient, maintenance costs rise and important information is no longer available in real time.
The good news is that a reliable mobile solution can help avoid many of these challenges right from the start.


Energy facilities are meant to generate electricity, not create additional administrative burdens. WhereverSIM provides the stable data connection needed for the efficient operation of your infrastructure. This allows you to reduce service calls, manage your SIM cards centrally, and lay the foundation for cost-effective facility operation.
With WhereverSIM, you benefit from an IoT SIM card that is specifically designed to meet the needs of solar power systems, wind farms, and other energy facilities.
Access to multiple mobile networks within a country (national roaming), e.g., in Germany: Telekom, Vodafone, and o2.
Thanks to network roaming, you always have access to the strongest mobile network in your location by default, regardless of the carrier.
>485 networks in over 189 countries for your M2M project. Near borders, devices automatically connect to networks in neighboring countries.
No throttling. The fastest possible local speed at all times.
As standard, our M2M SIM cards support data transmissions and SMS, voice calls on request.
For efficient energy control: Whether you are a municipal energy supplier, electricity producer or PV project developer - with our M2M and IoT SIM card, we offer you access to the strongest mobile network on site at every location. This means that generation and consumption data is automatically, reliably and securely transmitted at all times.
Modern energy management requires the consistent and reliable use of data. With our M2M solution, we enable your end devices to transmit data via mobile radio so that you have all the relevant data at your disposal. Whether for monitoring the energy production of an offshore wind farm or for remote reading of smart meters. You benefit from flexible M2M tariffs and maximum network availability.

Unlike consumer SIM cards from network operators, our M2M SIM cards are not tied to a specific mobile network. Instead, they enable IoT devices to access all available mobile networks at their respective locations via national roaming. Since our M2M SIMs are set to unmanaged roaming by default, they allow devices to connect to the strongest mobile network at their location rather than to that of a preferred carrier.
Worldwide, devices that meet the minimum technical requirements can connect to over 485 mobile networks using our M2M SIM card. In Germany, our M2M SIM cards support all mobile networks operated by the three carriers—Telekom, Vodafone, and o2—with a single plan.
In general, our IoT SIM cards work in any router. However, commercially available routers are usually not designed for professional use and may cause malfunctions or downtime, resulting in unnecessary costs.
For fast, stable and, above all, secure operation, we recommend M2M routers optimized for commercial and industrial use. With our PreConfig package, for example, we offer you pre-configured M2M routers with which you can easily bring your devices online - plug & play.
If you need further assistance in selecting the right hardware, our M2M experts will be happy to help.
No, our SIM cards are intended exclusively for use by businesses. We do not sell them to private individuals, either as individual SIM cards or in bulk. The M2M SIMs, however, are suitable for businesses of all sizes and across all industries.
Yes, in principle, almost any solar system can be equipped with an M2M SIM card for remote monitoring—provided that the hardware used supports a cellular connection or can be retrofitted accordingly.
Using an M2M SIM card is particularly useful for solar power systems in locations without a reliable Internet connection or where no additional network infrastructure is to be installed. Operational data, energy yield figures, and fault reports can be transmitted remotely at any time via the cellular network.
For residential PV systems—whether solar modules or solar roof tiles —on single-family homes, connecting via the existing home network is often sufficient. For commercial solar systems, ground-mounted systems, or distributed solar parks, however, a cellular connection offers significant advantages: Data transmission works independently of the local network and enables reliable monitoring even at hard-to-reach locations.
Yes. In fact, M2M SIM cards are particularly well-suited for use in remote locations. Mobile networks are available almost everywhere and, as an established technology, are standardized even across national borders. In more rural or remote regions, connecting machines via cable is usually too complicated or too expensive; wireless connectivity via mobile networks is a more cost-effective and faster solution in these areas.
Thanks to national roaming—a unique feature of M2M SIM cards—a device can connect to different cellular networks. WhereverSIM’s M2M SIMs are designed by default to always connect to the strongest network available at a given location. This increases connection availability and ensures reliable data transmission—even in rural areas or hard-to-reach locations.
This makes M2M SIM cards ideal for applications such as solar power systems, wind turbines, environmental and agricultural sensors, and other IoT devices in remote areas.
More than 20 years of experience, 100% focus on the customer, Hanseatic reliability. WhereverSIM stands for reliable and secure M2M SIM cards for remote monitoring of energy generation plants such as wind farms and ground-mounted PV systems or in the smart grid. We use our IoT SIM to connect energy suppliers, solar projects and offshore wind farms to the internet in Germany and around the world.
Together with strong international partners, we are continuously developing our services, always at the cutting edge of technology, always with the needs of our corporate customers in mind, always on an equal footing. Perfect for applications in the smart grid, smart metering or for monitoring and maintaining systems remotely.
Competent service and support in and from Germany.
All services are hosted in Europe and are subject to the strictest data protection regulations.
With 2-factor authentication, you can protect access to your WhereverSIM portal.