I also have an Envoy-R, installed in 2010, which shows this currently. Serial and MAC address have been cut off.
I hit F5 in the browser on the page to refresh it over the course of several minutes. The kW data did not change. However, the “Last connection to website” time increased, and then reset back to 0, in much less than 15 minutes. So, it seems the firmware may be polling the micro-inverter data and average it over 15 minute periods. But it’s definitely trying to upload data more frequently than every 15 minutes.
The data being uploaded to Enlighten is more detailed.
This could be because two of the 40 micro-inverters have powerline communication issues. Even after hardware replacement with the newest hardware revision last December, they continue to do so. They eventually report the total kWh either late in the day after dark, or the next day. But power curves throughout the day are all wrong because of these 2.
I have my Envoy integrated in HomeAssistant, which just polls data from that page .
The data in HomeAssistant indeed looks like sawtooth graph, with data changing almost exactly at 15 minute intervals. It’s wrong, because it’s based only on the homepage real-time kW, which are wrong due to the PLC problems with 2 micro-inverters.
Funnily, Enlighten reports this - no communication with any of the micro-inverters (0 communicating), which is wrong :
If I check the “power today” page in Enlighten, I see that it hasn’t been received any real-time data update for the last couple hours, since about 1pm.
Going back to 12:50pm, I see this :
Note the 12.2 kW “system power” at the bottom left. Very interesting, given that my system is only 9.4 kW DC. This is not just for that particular time, too. Looks like it started going over 10 kW around 9:35am. In the very same screenshot, on the top right, under “Today”, peak is shown to be 6.49 kW at 12:45pm, which sounds correct. I looked at data for yesterday, and I see the same bug. I had never seen tat before.
Data in pvoutput shows like this. Production dta is coming from Enlighten API . Consumption is coming from Wattvision cloud, which has my Rainforest Eagle data, and updates much more frequently than every 15 minutes - 15 seconds from the Zigbee smartmeter, not sure what interval in Wattvision.
As a result, the “Power used” is always off. I know from the Eagle/Wattvision my house consumes at least 1.2 kW at night even when we sleep with everything off, and zero solar production. Yes, I’m working on reducing that …
At this point, all the production data from all sources appears to be wrong, both in Enlighten, probably because of display bugs, and locally on the Envoy device itself, because of two micro-inverters that fail to communicate.
The data in HomeAssistant appears to be more correct than in the Enlighten web site.