Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1294
| Posted: 08:58pm 22 Dec 2025 |
Hi Gaspo, thanks for your post and the information, isn't it great to see "0" imported power
. I like your add on to keep track of the connector temperature - I haven't had the top cover off mine yet - probably the first thing I've ever owned and not done that 
. I assume that was required to get access to the connector in question? I was not aware modbus was an available option over the ethernet, you made good use of it. Does the ESP32 retransmit the inverter information via WiFi with the combined inverter plus your temperature value?I also made an incorrect assumption that the gateway unit was the WiFi point for the Sig, but the inverter itself has a WiFi antenna, so it appears the gateway communicates over I am guessing canbus or modbus or ethernet, data back to the Sig inverter for WiFi relaying?
I went out late last night to see the dormant temperature of my system around midnight.
The adjacent brick wall at the base of the inverter was at 20.4 degrees, the bottom module was 21.2 degrees. Each module was another ~0.5 degrees warmer, the inverter at the top was at ~24.5 degrees. So was there some heat growing from the bottom to the top or was the main heat at the top and reducing as it travelled downwards or probably a bit of both?
My comments about module & inverter heat thinking back, was just after dusk with the house aircon running (average 5+kW) so not a surprise for the Sig system to be noticeably warm at the time after a hot day.
This morning I took a look at the inverter data page and noticed some weird information. Maybe Gaspo (anyone?) can tell me what it is up to, here is the page;
The house load was about ~380W at the time yet phase 1,2 & 3 all have ~5A of current at ~240V the reactive power was ~4kVAR, reported power factor was ~.091, which when multiplied by the ~4kVAR equates to the ~380W of consumption.
Does this mean that the energy authority is supplying ~4KW of reactive power for my 380W load? I hope so lol its about time we got something for nothing back from them, but seriously if this is correct and there are many installations going in there will soon be a grid problem ? If its true whereas previously home owners are not hit for their reactive power, maybe this will cause change ?
Edited 2025-12-23 08:07 by wiseguy