Question Why is micro inverter saying its wifi connection is 433 mhz? I thought wifi is 2.4 GHz or 5.8 GHz ?

[miogpsrocks]

Why is micro inverter instructions saying its wifi connection is 433 mhz? I thought wifi is 2.4GHz or 5.8GHz ? Is this some kind of metric thing?



https://www.inverter.com/images/upl...37cXAfkbv5p8RfQO6xFvuNKcGy5TCeDNDE95o9SLa06Jp

 

[lantis3]

Probably labeled wrongly, should be 433 Mbps.

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Well, I could be wrong though, some specialty electronics might use non standard frequency.
https://www.amazon.com/Wireless-Transmitter-Receiver-Arduino-Raspberry/dp/B0C5QWRZ6R

 

[JohnMGotts]

The system you show is a subsystem using the 433Mhz signal to broadcast to its own modem which in turn sends 2.4Ghz to your in-home router.
It requires separate equipment for monitoring.

 

[kanewolf]

Why is micro inverter instructions saying its wifi connection is 433 mhz? I thought wifi is 2.4GHz or 5.8GHz ? Is this some kind of metric thing?



https://www.inverter.com/images/upl...37cXAfkbv5p8RfQO6xFvuNKcGy5TCeDNDE95o9SLa06Jp

The "WIFI modem" is a device that converts the 433Mhz to standard WIFI. It would be from the manufacturer of the micro inverter. That is why it is a "modem". It converts one communication standard to another.

 

[bill001g]

Looks like you need another device that they call a modem. This documentation is extremely poorly written it appears to be a translated document so some things are hard to figure out. If you search for WVC modem you will find other vendors that sell similar equipment that are somewhat better in explaining how this is setup.

 

[miogpsrocks]

Seems like this company or maybe in China they treat this "433Mhz "like we treat Bluetooth.

This "modem" seems to be like their version of a Bluetooth gateway only the frequency is not Bluetooth.

Odd why they would not just use Bluetooth or even just plan old normal WIFI to relay the data.

 

[kanewolf]

Seems like this company or maybe in China they treat this "433Mhz "like we treat Bluetooth.

This "modem" seems to be like their version of a Bluetooth gateway only the frequency is not Bluetooth.

Odd why they would not just use Bluetooth or even just plan old normal WIFI to relay the data.

400Mhz carries much further than 2.4Ghz. A solar array could be spread out. The manufacturer's documentation says one modem can support 40+ inverters.

 

[lantis3]

According to OP's documentation link,

The vendor said:

433MHz Long distance communication. The communication method of 433MHz is a short connection method, that is, the signal is disconnected after sending / receiving.​

​

The device for data collection with the inverter is WiFi-MODEM. The communication channel is civilian channel. Long-distance wireless transmission (open area up to1800 meters, good wall penetration capability, air baud rate 500bps)​

This is for (long distance) data collection only, and the baud rate is only 500bps, even lower than the 1200bps modem that people used to get on line to BBS (bulletin board system) in early days. Once data collection is completed, the connection is disconnected immediately.