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

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miogpsrocks

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Dec 6, 2019
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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

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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.
 
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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.
 
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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.
 
miogpsrocks said:
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.
Click to expand...
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.
 
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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)​
Click to expand...

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.
 
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433mhz is typically used for Home assistant stuff for home automation. It's very low bandwidth, but carries much better through walls and distance than wifi. If all you need are a status message and a few bytes of data, then it's vastly superior to wifi in a practical sense.

As said before, the 433mhz carries the data from the inverter to the wifi modem, which then connects to you home 2.4ghz/5ghz wifi.
 
gggplaya said:
433mhz is typically used for Home assistant stuff for home automation. It's very low bandwidth, but carries much better through walls and distance than wifi. If all you need are a status message and a few bytes of data, then it's vastly superior to wifi in a practical sense.

As said before, the 433mhz carries the data from the inverter to the wifi modem, which then connects to you home 2.4ghz/5ghz wifi.
Click to expand...

Is 433 the same as "RF" remotes?
 
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